CN102783496B - Composite bactericide comprising prochloraz and use thereof - Google Patents

Abstract

The invention discloses a compound fungicide containing prochloraz, its components and weight content are: 10% to 90% of component A and 90% to 10% of component B; component A is prochloraz Amines, component B is pyraclostrobin, pyraclostrobin or triaconazole. The compound fungicide can be made into emulsion type fungicide, powder/granule type fungicide. The compound fungicide can be used to prevent and control diseases of vegetables or fruit trees, such as cucumber anthracnose, tomato anthracnose, pepper anthracnose, fruit tree dry rot, bamboo rust, strawberry anthracnose, grape anthracnose, hickory dry rot, etc. .

Description

Compound fungicide containing prochloraz and its application

technical field

The invention relates to a fungicide, in particular to a compound fungicide used for preventing and treating vegetable and fruit tree diseases.

Background technique

Prochloraz [Prochloraz, the chemical name is N-propyl-N[2-(2,4,6-trichlorophenoxy) ethyl] imidazol-1-formamide], which was developed by the British Boost company in 1974 It was synthesized for the first time in 1977 and introduced to the market in 1977 as an agricultural fungicide with trade names such as Sporatk, Mirage and Sporgon. Prochloraz is a kind of fungicide with certain systemic action, and its mechanism of action is to destroy the cell membrane function of the fungus by inhibiting the biosynthesis of one of the main components of the fungal cell membrane, ergosterol (sterol). Its target in bacteria is the C14 demethylase (C14-demethylase) in the ergosterol biosynthesis pathway in fungi, which belongs to the demethylation inhibitors in the ergosterol biosynthesis inhibitor fungicides (SBIs) ( DMIs). The pure product of prochloraz is in the form of white crystals, the solubility in water is 55g/L, and the organic solvents such as dichloromethane and toluene are more than 600g/L; it is relatively stable under acidic, alkaline or general storage conditions, but it is unstable to sunlight. Degrades rapidly with UV light. The acute oral LD ₅₀ of rats is >1600 mg/kg, which belongs to low toxicity compounds.

Prochloraz has a good control effect on plant diseases caused by various pathogenic fungi of the genus Fusarium, Penicillium and Colletotrichum, and is currently mainly used for seed treatment to control rice rot. Seedling disease, etc.; post-harvest treatment to prevent and control citrus blue (green) mildew, etc., spray treatment to prevent and control tropical fruit crown rot, etc. As an old product with a large tonnage, prochloraz has been widely used in Europe, America, the Middle East, Japan, China, South Africa and other countries and regions for many years. It is one of the main fresh-keeping agents and fungicides for melons and fruits. The dosage has been in the forefront of fungicides. In recent years, my country has become a major producer and user of prochloraz in the world, and continuous use will enable the accumulation and formation of prochloraz-resistant subgroups of pathogenic fungi. It is particularly worth noting that most of the prochloraz products used in the prevention and control of plant diseases in my country are single doses, which will make the resistance situation of prochloraz more severe. There are only a few compound preparations such as prochloraz, benzimidazole fungicides, triadimefon, etc., because the compatible drug itself is a single-site inhibitor drug that has already developed drug resistance, it is very important for delaying and treating prochloraz. The role of drug resistance is also very limited. At present, the control effect of rice bakanae disease and various tropical fruit diseases has declined due to drug resistance, and drug resistance has become the main factor restricting the application of prochloraz. In addition, the antibacterial spectrum of prochloraz is concentrated, and the limitation of disease prevention spectrum and application spectrum also limits its greater role.

Contents of the invention

The technical problem to be solved by the present invention is to provide a compound fungicide containing prochloraz, which can be used to prevent and control diseases of vegetables or fruit trees.

In order to solve the above technical problems, the present invention provides a compound fungicide containing prochloraz, the composition and weight content of the compound fungicide are: 10%~90% of component A and 90%~10% of Component B; Component A is prochloraz, and component B is procetaxel, pyraclostrobin or triaconazole.

The present invention also provides an emulsion-type bactericide made by using the prochloraz-containing compound bactericide, and each L of the emulsion-type bactericide contains 50-900 g of the prochloraz-containing compound bactericide.

The present invention also simultaneously provides a powder/granular fungicide made using the prochloraz-containing compound fungicide, the weight content of the prochloraz-containing compound fungicide in the powder/granule fungicide is 10% to 90%.

The present invention also provides the application of the prochloraz-containing compound fungicide at the same time: it is used for preventing and treating diseases of vegetables or fruit trees. The above-mentioned diseases include cucumber anthracnose, tomato anthracnose, pepper anthracnose, fruit tree dry rot, bamboo rust, strawberry anthracnose, grape anthracnose, hickory dry rot and so on.

The preferred version of the present invention is as follows (the following proportions represent the weight ratio):

1. When used to prevent and control cucumber anthracnose, prochloraz: disenlian = 1:2.8~3.2, the best is prochloraz: disenlian = 1:3;

2. When used to prevent and control strawberry anthracnose, prochloraz: pyraclostrobin = 2.8~3.2: 1; the best is prochloraz: pyraclostrobin = 3: 1;

3. When used for the prevention and treatment of capsicum anthracnose, prochloraz: disenlian = 1:2.8~3.2, the best is prochloraz: disenlian = 1:3;

4. When used to prevent hickory dry rot, prochloraz: triazol=2.8~3.2:1; the best is prochloraz: triazol=3:1;

5. When used to prevent and control grape anthracnose, prochloraz: pyraclostrobin = 1:2.8~3.2, the best is prochloraz: pyraclostrobin = 1:3.

6. When used to prevent and control bamboo rust, prochloraz: triazol = 2.8~3.2:1, the best is prochloraz: triazol = 3:1.

In actual use, the compound fungicide containing prochloraz (hereinafter referred to as the compound fungicide) of the present invention can be processed into various pesticide preparations with different contents and dosage forms according to different control objects, such as emulsion-type fungicides and Powder/granular fungicide. Each L of emulsion-type fungicide contains 50-900g of compound fungicide, and the remaining components are 1%-45% solvent (including emulsifier), 1%-20% auxiliaries and water (constant volume with water, About 1%~40%), the above percentage refers to the volume content of this component in the emulsion type fungicide. The components and weight content of the powder/granule fungicide are: 10%-90% compound fungicide, 9%-75% adsorbent or filler and 1%-20% auxiliary agent.

Due to the different content of components, emulsion type fungicides can be divided into suspension concentrate (SC) and microemulsion type (ME), powder/granule type fungicides can be divided into wettable powder (WP) and water dispersible granule (WG) . The various formulations of the above-mentioned compound fungicides are all formulated from the compound fungicides of the present invention using conventional production processes, and the emulsifiers, solvents, auxiliary agents, adsorbents/fillers, etc. involved in the components are all pesticides The conventional varieties used at the time. For example: Nongru 33#, Nongru 700# or Nongru 602# can be used as emulsifier, xylene, DMF or ethanol can be used as solvent, diatomite, white carbon black or perlite can be used as adsorbent/filler, etc. Auxiliaries can be selected from organic silicon, polyethylene glycol and the like.

The present invention is aimed at the situation that prochloraz, which is widely used in the existing production, has high efficiency but drug resistance has appeared and the spectrum of antibacterial and disease prevention is limited; With the characteristics of low toxicity, safety, good environmental compatibility and wide spectrum of antibacterial and disease prevention, it provides a group of compound fungicides for the prevention and treatment of vegetables, fruit trees and bamboo diseases (especially prochloraz-resistant diseases). By compounding the above-mentioned fungicides with different functions - prochloraz (component A) and (component B) (component B is one of pyraclostrobin, pyraclostrobin or triaconazole) , make use of each other's strengths to achieve the purpose of improving the effect, delaying and controlling drug resistance. The compound fungicide of the present invention can be used to prevent fungal diseases such as cucumber anthracnose, pepper anthracnose, bamboo rust, strawberry anthracnose and grape anthracnose or fruit tree fungal canker and fruit tree dry rot, and belongs to new type, high efficiency, Low toxicity fungicide.

The inventor provided the technical and theoretical basis for the present invention through the research on the occurrence, evolution and treatment technology of drug resistance of bacteria, the antibacterial mechanism and drug resistance of prochloraz. The present invention carries out compound screening by using prochloraz and component B (component B is pyraclostrobin, pyraclostrobin or triaconazole), and its goal is to control drug resistance and reduce production costs. Expand the application spectrum of disease prevention. The invention mainly prevents and treats anthracnose and the like resistant to DMIs such as prochloraz. The invention meets the needs of the current production of green and pollution-free agricultural products.

Prochloraz in the compound preparation has high activity against anthracnose, etc., but it has developed drug resistance, and the application spectrum of disease prevention is not wide; The application spectrum of disease prevention is wide, especially there is no cross-resistance with prochloraz. After the combination of prochloraz and prosenlian or pyraclostrobin or triadol, the efficacy of the drug is significantly increased, the application spectrum of disease prevention is obviously broadened, and the production cost is 10% to 30% lower than that of single use. The control effect can be stabilized at more than 68%.

The results of indoor bioassay and field drug efficacy test of the present invention show that the two components are compatible with each other, safe to use, remarkable in effect, and can effectively prevent and treat diseases such as anthracnose. Compared with other pesticides, the present invention has the following advantages:

1. The formula product of the present invention is a high-efficiency, low-toxicity, low-residue, and environmentally compatible pesticide, which has both protective and therapeutic effects, and meets the requirements of green agricultural product production and environmental protection.

2. In addition to solving the drug resistance problem of prochloraz, the present invention can also effectively solve the problem of narrow disease prevention spectrum of prochloraz. The invention is particularly useful for controlling drug-resistant anthracnose.

3. The method of using the product of the present invention is simple, the cost is low, and all farmers can accept it.

4. The present invention is safe for crops and has a good effect of preventing and treating anthracnose, etc., and the effect can be stabilized at more than 68%, and it is not easy to produce drug resistance.

When the compound fungicide of the present invention is actually used in the field, the preparation of the compound fungicide is diluted with water to an effective concentration (that is, the concentration of the compound fungicide) of 0.1 to 5 g/L, and the method of use is spraying; until The plant surface is completely wetted until water drips down. Therefore, generally speaking, 2.5-50 grams of active ingredients are used per mu (this data is the amount of compound fungicides containing prochloraz, that is, the effective amount of emulsion-type fungicides or powder/granule-type fungicides).

Detailed ways

Embodiment 1, indoor formula screening:

Toxicity and synergistic coefficient were determined by dissolving prochloraz technical substance and 70% Dysenlian WP respectively in acetone and sterile water according to different weight ratios, and using the mycelium growth method to determine the effect on cucumber anthracnose bacteria (Table 1). Inhibition was followed by calculation of _EC50 values and synergistic coefficients.

According to the main prevention and control objects, select the ratio of synergistic coefficient (SR) ≥ 1.5, and carry out appropriate dosage form processing.

Table 1. Screening of formulas for controlling cucumber anthracnose

Note: The above parentheses refer to the weight ratio of the two components (prochloraz and promethazine), SR=theoretical EC ₅₀ value/measured EC ₅₀ value.

Embodiment 2, indoor formula screening:

Toxicity and synergistic coefficients were determined by dissolving prochloraz and pyraclostrobin in acetone at different weight ratios, using the mycelium growth method to measure the inhibitory effect on strawberry anthracnose bacteria (Table 2), and then calculating EC ₅₀ values and synergistic coefficients.

Table 2. Formula screening for preventing and treating strawberry anthracnose

Note: The above brackets refer to the weight ratio of the two components, SR=theoretical EC ₅₀ value/measured EC ₅₀ value.

Embodiment 3, indoor formula screening:

Toxicity and synergistic coefficient are determined by dissolving the prochloraz technical substance and 70% Disenlian WP respectively in acetone and sterile water according to different weight ratios, and adopting mycelium growth method to determine the effect on pepper black spot anthracnose bacteria (Table 3 ) inhibition, and then calculate the EC ₅₀ value and synergistic coefficient.

According to the main prevention and control objects, select the ratio of synergistic coefficient (SR) ≥ 1.5, and carry out appropriate dosage form processing.

Table 3. Formula screening for preventing and controlling pepper anthracnose

Note: The above brackets refer to the weight ratio of the two components, SR=theoretical EC ₅₀ value/measured EC ₅₀ value.

Embodiment 4, indoor formula screening:

Toxicity and synergistic coefficients were determined by dissolving prochloraz and triadol in acetone at different weight ratios, and using the mycelium growth method to determine the inhibitory effect on pecan dry rot bacteria (Table 4) , and then calculate the _EC50 value and synergy coefficient.

According to the main prevention and control objects, select the ratio of synergistic coefficient (SR) ≥ 1.5, and carry out appropriate dosage form processing.

Table 4, the formula screening of preventing and treating pecan dry rot

Note: The above brackets refer to the weight ratio of the two components, SR=theoretical EC ₅₀ value/measured EC ₅₀ value.

Embodiment 5, indoor formula screening:

Toxicity and synergistic coefficients were determined by dissolving prochloraz and pyraclostrobin in acetone at different weight ratios, using the mycelium growth method to measure the inhibitory effect on grape anthracnose bacteria (Table 5), and then calculating EC ₅₀ values and synergistic coefficients.

Table 5. Formula screening for preventing and controlling grape anthracnose

Note: The above brackets refer to the weight ratio of the two components, SR=theoretical EC ₅₀ value/measured EC ₅₀ value.

Embodiment 6, field efficacy test

A compound fungicide, its component and weight content are: 10% of prochloraz and 30% of daisenlian compound fungicide (that is, the component and weight content of the compound fungicide are: 25 % prochloraz and 75% disenlian) to make a wettable powder (WP) with an effective weight content of 40%, that is, 400g of compound fungicide per kilogram of wettable powder (WP) (that is, 100g Prochloraz and 300g of Disenlian). This wettable powder is hereinafter referred to as 40% Midi WP. The above-mentioned wettable powder (WP) was used to control cucumber anthracnose. The experiment was set up in the suburbs of Hangzhou City, each test area was 0.50hm ² , and the test objects were cucumbers with the same growth conditions. Spray the medicine for the first time on May 10, 2010, spray the medicine for the second time on May 17, spray 2 times altogether. The application concentration is 40% Midi-Dai WP125 mg/L (that is, 40% Midi-Dai WP is diluted with water, so that the sum of the weights of prochloraz+Daisenlian as active ingredients contained in each L of medicine is 125mg/L, the following are similar, that is, the concentration refers to the content of active ingredients) and 375mg/L, the control agent 25% prochloraz WP375 mg/L; spray until the plant surface is completely wet and water droplets flow down (that is, every hm ² The volume of the diluted drug solution is 320L).

The control effects are shown in Table 6. The control effects of 40% Midai WP125 mg/L and 375 mg/L on cucumber anthracnose were 68.25% and 79.62%, respectively. Under the premise of the same effective dosage, the present invention is superior to the contrast agent prochloraz, and the difference is significant.

Table 6, 40% rice generation WP (embodiment 6) control effect of cucumber anthracnose

*: Repeat 1-4 value to be the disease index, prevention effect=100*(CK disease index-treatment disease index)/CK disease index. Different lowercase letters behind the value in the same column indicate significant difference at P=0.05 level.

Comparative example 1-1, "10% prochloraz and 30% prochloraz compound fungicide" in Example 6 was changed to "15% prochloraz and 25% prochloraz compound bactericidal agent agent", all the other are the same as in Example 6.

The control effect is shown in Table 6-1.

Table 6-1, 40% Mimidai (comparative example 1-1) WP control effect of cucumber anthracnose

Comparative example 1-2, "10% prochloraz and 30% prochloraz compound bactericide" in Example 6 was changed to "5% prochloraz and 35% prochloraz compound bactericidal agent agent", all the other are the same as in Example 6.

The control effect is shown in Table 6-2.

Table 6-2, 40% mimidai (comparative example 1-2) WP control effect of cucumber anthracnose

Comparative example 1-3,

With above-mentioned embodiment 6, comparative example 1-1, 3 kinds of " 40% mites on behalf of WP " described in comparative example 1-2, be all diluted into application concentration and be 416 mg/ L and carry out the prevention and cure of pecan dry rot Effect test: the control agent is 25% prochloraz WP, the application concentration is 416 mg/L, and the 70% prochloraz WP application concentration is 1458 mg/L, and the hickory tree is sprayed until the plant surface is completely wetted with water droplets until it flows down (that is, the amount of diluted medicinal solution per ^hm2 is 480L).

4 replicates were set up for each treatment, and 5 hickory trees were arranged randomly in each replicate. In April-May, 2009, after the peak period of the disease, the pesticide was applied continuously for 2 times, and the interval of application was 10 days, and the results were investigated 7 days after the second application.

The control effect is shown in Table 6-3. The disease control effects of prochloraz and disenlian alone were poor, respectively 38.9% and 32.6%, indicating that neither of them can be directly used to prevent and control hickory dry rot. After the two are compounded, they show obvious synergistic effect, and the control effect of 40% Mi Dai WP (Example 6) on hickory dry rot reaches 67.4%. It shows that the scope of compounding of prochloraz and disenlian will be expanded, and the application prospect will be more extensive.

Table 6-3. Control effect of 40% Mi Dai WP on hickory dry rot

Embodiment 7, field efficacy test

A compound fungicide, its components and weight content are as follows: 10% prochloraz and 30% pyraclostrobin compound fungicide are made into a suspension concentrate (SC) with an effective weight content of 40%, That is, each L of suspension concentrate contains 400g of compound fungicide (that is, 100g of prochloraz and 300g of pyraclostrobin per L of suspension concentrate). This suspending agent is hereinafter referred to as 40% imidazole SC. The above-mentioned suspension concentrate (SC) was used to control grape anthracnose. The test was set in the suburb of Quzhou City, with an area of 0.50hm ² for each test, and the test objects were grapes with the same growth conditions. Spray the medicine for the first time on May 21, 2011, spray the medicine for the second time on May 28, spray 2 times altogether. The application concentration was 40% Mipyridine SC200 and 350 mg/L. The control drug 25% prochloraz WP 350 mg/L. Spray separately until the plant surface is completely wet and water drops flow down (that is, the amount of diluted medicinal solution per ^hm2 is 320L). The control effects are shown in Table 7. The control effects of 40% Mipyridine SC200 and 350 mg/ L on grape anthracnose were 67.51% and 85.03%, respectively. Under the premise of the same effective dosage, the present invention is superior to the contrast agent prochloraz, and the difference is significant.

Table 7, 40% Mipyril SC (Example 7) Control Effect of Grape Anthracnose

Comparative example 2-1,

Change the compound fungicide in the 40% suspension concentrate (SC) in Example 7 to be composed of 15% prochloraz and 25% pyraclostrobin, and the rest are the same as in Example 7; the control effect is shown in the table 7-1.

Table 7-1, the effect of 40% Mipyridine SC (comparative example 2-1) on controlling grape anthracnose

Comparative example 2-2,

Change the compound fungicide in the 40% suspension concentrate (SC) in Example 7 to be composed of 5% prochloraz and 35% pyraclostrobin, and the rest are the same as in Example 7; the control effect is shown in the table 7-2.

Table 7-2, the effect of 40% Mipyridine SC (comparative example 2-2) on controlling grape anthracnose

Embodiment 8, field efficacy test

A compound fungicide, its components and weight content are: 30% prochloraz and 10% triazol compound fungicide (that is, the components and weight content of the compound fungicide are: 30% % prochloraz and 10% triazol) to make a microemulsion (ME) with an effective weight content of 40%, that is, every L of suspension contains 400g of compound fungicide (that is, contains 300g of prochloraz and 100g of triazol). This suspending agent is hereinafter referred to as 40% rice powder ME. Bamboo rust was tested using the microemulsion (ME) described above. The test is set in the suburb of Lin'an City, with a test area of 0.50hm ² , and the test objects are bamboos with the same growth conditions. Spray the medicine for the first time on April 25, 2011, spray the medicine for the second time on May 2, spray 2 times altogether. The application concentration is 40% rice·powder ME 350 and 500 mg/L. The control drug 25% prochloraz WP was 500 mg/L. Spray separately until the plant surface is completely wet and water droplets flow down (that is, the amount of diluted medicinal solution per ^hm2 is 480L).

The control effects are shown in Table 8. The control effects of 40% rice powder ME 350 mg/L and 500 mg/L on bamboo rust were 68.1% and 81.6%, respectively. Under the premise of the same effective dosage, the present invention is superior to the contrast agent prochloraz, and the difference is significant.

Table 8, 40% rice powder ME (embodiment 8) prevents and treats bamboo rust effect

potion repeat 1 repeat 2 repeat 3 Repeat 4 average Average control effect (%) 40% rice powder ME 350 mg/ L 0.11 0.12 0.1 0.12 0.1125 68.1 40% rice powder ME 500 mg/ L 0.05 0.08 0.05 0.08 0.065 81.6 25% Prochloraz WP 500 mg/ L 0.13 0.15 0.11 0.15 0.135 61.7 CK (water control) 0.35 0.32 0.36 0.38 0.3525 /

Comparative example 3-1, "30% prochloraz and 10% prochloraz compound fungicide" in Example 8 was changed to "25% prochloraz and 15% prochloraz compound fungicide agent", all the other are the same as in Example 8.

The control effect is shown in Table 8-1.

Table 8-1, 40% rice powder ME (comparative example 3-1) control effect of bamboo rust

Comparative example 3-2, change "30% prochloraz and 10% prochloraz compound bactericide" in embodiment 8 into "35% prochloraz and 5% prochloraz compound sterilization agent", all the other are the same as in Example 8.

The control effect is shown in Table 8-2.

Table 8-2, 40% rice powder ME (comparative example 3-2) control effect of bamboo rust

Embodiment 9, drug resistance control effect measurement

A compound fungicide, its components and weight content are as follows: 10% prochloraz and 30% prochloraz compound fungicide are made into granules (WG) with an effective weight content of 40%, that is, every One kilogram of granules contains 400g of compound fungicide. This suspending agent is hereinafter referred to as 40% Mimidai WG. The above-mentioned wettable powder granule (WG) was used to test the resistance of capsicum anthracnose to prochloraz. This experiment was carried out simultaneously in Lin'an City and Hangzhou City (with the same natural environment), each test area was 0.60hm ² , and the test objects were peppers with the same growth conditions. Spray the medicine for the first time on April 20, 2009, and spray once every 10 days during the epidemic period of the disease, and continue until June 10, 2012. The application concentration of 40% Midi WG is 375mg/L; the application concentration of the contrast agent 25% prochloraz WP is 375mg/L; respectively spray until the plant surface is completely wetted with water droplets flowing down (that is, every ^hm2 The amount of diluted medicinal solution is 320L).

Sampling was taken on April 20, 2009 and June 10, 2012, and brought back to the experiment to isolate the bacteria and analyze the development of resistance to prochloraz before and after the treatment. At least 30 strains were isolated from each treatment, and the frequency of drug resistance was determined by the differential dose method. The strains that could not grow on the PDA (potato dextrose agar) medium containing 3 mg/L prochloraz were classified as prochloraz-sensitive strains. The strains that can grow on PDA containing 3 mg/L prochloraz are resistant strains. Drug resistance frequency = number of resistant strains of the treatment/total number of strains of the treatment; drug resistance control effect (%)=100*(resistance frequency before treatment - resistance frequency after treatment)/resistance frequency before treatment.

The governance effect is shown in Table 9.

The control effect of 40% mi·dai WG on the resistance of pepper anthracnose was 44.0%. However, the control effect of 25% prochloraz WP alone on the resistance of pepper anthracnose was -137.3%. This proves that the present invention preferably solves the problem of disease, especially the resistance of anthracnose to prochloraz.

Table 9 The control effect of 40% Mi WG (Example 9) on pepper anthracnose resistance

*: drug resistance control effect (%)=100*(frequency of drug resistance before treatment - frequency of drug resistance after treatment)/frequency of drug resistance before treatment.

In Comparative Example 4-1, "10% prochloraz and 30% prochloraz compound fungicide" in Example 9 was changed to "15% prochloraz and 25% prochloraz compound fungicide ", all the other are with embodiment 9; Obtain comparative example 4-1.

Comparative example 4-2, "10% prochloraz and 30% prochloraz compound bactericide" in Example 9 was changed to "5% prochloraz and 35% prochloraz compound bactericidal agent Agent ", all the other are with embodiment 9; Obtain comparative example 4-2.

The governance effect is shown in Table 10. The 40% mii generation WG described in comparative example 4-1 is 34.6% to the drug resistance control effect of pepper anthracnose; 30.9%; and 25% prochloraz WP alone, the resistance control effect on pepper anthracnose was -137.3%. This proves that the present invention preferably solves the problem of disease, especially the resistance of anthracnose to prochloraz.

Table 10, 40% Mi Dai WG (comparative example 4-1 and comparative example 4-2) control effect on pepper anthracnose resistance

Finally, it should be noted that the above examples are only some specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims (3)

1., containing the application of composite bactericide in control Strawberry anthracnose of Prochloraz, it is characterized in that this composite bactericide containing Prochloraz is made up of the component of following weight content: the component A of 10% ~ 90% and the B component of 90% ~ 10%; Described component A is Prochloraz, and described B component is pyraclostrobin; Prochloraz: the weight ratio of pyraclostrobin is 3:1.

2. the application of composite bactericide in control Strawberry anthracnose containing Prochloraz according to claim 1, it is characterized in that: the composite bactericide containing Prochloraz is made emulsion-type bactericide, containing the composite bactericide of 50 ~ 900g containing Prochloraz in described often liter of emulsion-type bactericide.

3. the application of composite bactericide in control Strawberry anthracnose containing Prochloraz according to claim 1, it is characterized in that: the composite bactericide containing Prochloraz is made powder/grain type bactericide, the weight content of the composite bactericide containing Prochloraz in described powder/grain type bactericide is 10% ~ 90%.