JPS58109403A - Method for combatting small insect pests - Google Patents

Abstract

PURPOSE:A composition consisting of gum Arabic or a water-soluble macromolecular substance mainly composed of the same, an inorganic phosphate salt, a water-insoluble fine powder and an inorganic carbonate salt is dissolved in water and sprayed to combat small insect pests with no injury to plants and no environmental pollution as well as with high efficiency and steadiness. CONSTITUTION:Gum Arabic or a water-soluble macromolecular substance mainly composed of the same, such as Arabic gum incorporated with guar gum or carrageenan is combined with an inorganic phospahte salt such as sodium primary phosphate, sodium secondary phosphate, sodium pyrophosphate, a water-insoluble fine powder such as bentonite and an inoragnic carbonate salt such as sodium carbonate or potassium carbonate, when necessary, additionally a surfactant such as lauryl sulfate salt and an acidic or alkaline substance for adjusting pH. The resultant composition is dissolved in water and sprayed to small insect pests to control them. It shows high combatting effect against even insect pests resistant to chemicals.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a composition prepared by adding a phosphate, a water-insoluble fine powder, a carbonate, and, if necessary, a surfactant and a pH adjuster to gum arabic or a polymeric substance based on gum arabic. It relates to a method for killing microscopic pests by dissolving them in water and spraying them on microscopic pests.

Methods of controlling insect pests using the properties of polymeric substances have been put to practical use in the past, such as ``fly paper'', lotill for catching goya, and insecticides that use the hibernation period of fruit trees to control insects such as scale insects. However, in recent years, the head of synthetic medicine, Jt.
The occurrence of pests with high drug resistance due to JJ stool has increased significantly, and various methods of physically controlling pests using polymer resins and the like have been proposed as countermeasures against these pests.

However, regardless of when it is used in situations where there are no living plants or when plants are dormant, in the field of controlling pests of general crops that occur during the active period of plants (8), the mere insecticidal effect alone is not practical. In addition to ensuring safety for crops at the actual application level, sufficient consideration must also be given to non-contamination. It must be something that can be satisfied.

In this way, when we look at the known proposals from a comprehensive perspective of pest control, we find that these methods are not necessarily satisfactory; in fact, there have been no examples of practical application so far. I don't see it.

In particular, it is difficult to see that sufficient consideration is given to the development of chemical damage caused by continuous application, high W) application, or long-term application.

As a result of extensive research into highly practical control methods targeting microscopic insect pests that parasitize crops during their active stage, the present inventors have discovered gum arabic or a water-soluble polymer mainly composed of gum arabic. Mix phosphate, water-insoluble fine powder, and carbonate with
l (adding an acidic or basic substance for adjustment, dissolving the resulting composition in an appropriate amount of water, and applying this suspension to extremely harsh insect pests that parasitize garden crops and vermilion plants, etc.) When we carried out practical spraying, we were surprised to find that it did not cause any chemical damage to even extremely soft crops in a wide yoke area, and showed excellent control effects, and did not cause any contamination to the crops. It was discovered that it does not give any harmful effects and has excellent applicability, and the main subject of the present invention was completed.

To obtain an ideal pest control method that is completely safe for both humans, livestock, and crops, by making each component of the composition used in the history consist of substances that are safe for humans and animals, and applying the same amount of oil. Successful.

Furthermore, according to the method of the present invention, it is possible to control not only adults and larvae of microscopic pests, but also insecticides that are conventionally inert.
It has the advantage of being able to simultaneously exterminate eggs of lupus mites.

Furthermore, it has been revealed that the method of the present invention has a high control effect on so-called drug-resistant peach pests that have been given strong resistance by synthetic pesticides.
This is extremely unique as it provides an innovative solution to an important problem in modern pest control.

The method of the present invention is now applied to the larvae of the resistant Kanzawa spider mite that parasitizes melon leaves and young seedlings grown in horticultural glass chambers.
The method will be explained in detail using examples of controlling adults and eggs.

Gum arabic powder 390p, carrageenan 10g1 monobasic sodium phosphate 40#, 250 mesh bentonite 40
Mix 10 g of sodium lauryl sulfate as a surfactant with 64.9 g of sodium bicarbonate, dissolve this in 501 g of water, and apply it to melon leaves where resistant Kanzawa spider mites were abundant.
1 with a power sprayer with an allocation of 4001 per 10 ares.
When sprayed using the usual method, the mortality rate of Kanzawa spider mite adults and larvae after 12 hours was l'i98.1.
%, and the mortality rate of eggs was 96.6% per day.

Bis(chlorphenyl) as a conventional pesticide
The trichlorethanol emulsion was prepared at a standard dose of 10
When sprayed on Kanzawa spider mites in the same glass room at a rate of 2001 per area, the mortality rate of adults and larvae was 622% after 12 hours, and the mortality rate of eggs was 21% after 10 hours.
It was 5chi. Also, after 24 hours of this chanting, severe dehydration symptoms were observed in the melons.

Next, as a severe phytotoxicity test, the upstream composition solution of the present invention was sprayed on young melon seedlings at a rate of 4001/10 ares for 8 consecutive days, and no phytotoxicity was observed even after 2 months. After 10 consecutive days of rotting, a slight symptom of growth inhibition was observed in the lower leaves after 4 weeks, but after 2 months, there was no effect on the quality and ripeness of the melon fruit.

As a historically severe test, the above composition according to the method of the present invention was dissolved in 10 ml of water to prepare a highly concentrated solution, and this was dissolved in 10 ml of water.
When it was sprayed on young seedlings in a melon greenhouse at a rate of 4,001 g/are, no chemical damage to the seedlings was observed after 4 weeks.

Moreover, in this case, almost no staining on the appearance of melon leaves and fruit due to the cough composition was observed, and the crystallinity of the fruit was not removed. In addition to the specific effects of this water-soluble polymer, it is also possible that the substance promotes adhesion of pests and the coating effect of the substance tested, but these effects naturally extend to crops as well. , crops should suffer from phytotoxicity due to inhibition of respiration and inhibition of photosynthesis, and in fact, from the composition obtained by the method of the present invention: from which mef&salt, water-insoluble fine powder, and carbonate have been removed, the composition is 50 times more When dissolved in water and sprayed on melon leaves at a rate of 4001/lO are,
Although it was acknowledged that a large amount of damage would be caused to crops, if only one method of the present invention is used, it is extremely safe as already explained. A,...,,Y 7.4 E is suitable for water-soluble polymers. 1. There are no particular restrictions on the type of pseudomolecular substances added to gum arabic, but when using the present invention as a method that is harmless to humans and animals, guar gum, carrageenan,
Natural substances such as starch, casein, dextrin, starch, milk powder, etc., and synthetic substances such as C, M, C, xanthan gum, etc. are used, and particularly preferably guar gum, xanthan gum, carrageenan, C, M,C,
, agar can be used in a mixture of one or two or more agars.

The amount of polymeric substances added to gum arabic varies depending on the type of the polymeric substance, but it is generally preferable to use each in an amount of 1 to 40% by weight relative to gum arabic.

Next, the phosphates used in the method of the present invention include monosodium phosphate, disodic phosphate, acidic sodium pyrophosphate,
Potassium phosphate, dipotassium phosphate, 1 ammonium to phosphoric acid,
Ammonium phosphate and potassium acid pyrophosphate are suitable; if other phosphates are used, it is difficult to expect the desired effect described above. In the present invention, the phosphate salt is used in a range of 002 to 2 times the weight ratio of the polymeric substance [j4A]. If the amount of phosphate is outside this range, the releasability of the polymer thin film will deteriorate, which is undesirable. Potassium carbonate is a carbonate,
Soda carbonate, potassium bicarbonate, sodium bicarbonate, sodium sesquicarbonate, and potassium sesquicarbonate are suitable, and are used in an amount of 0.03 to 3 times the weight of the polymeric substance. If the amount of carbonate is outside this range, peeling of the polymer thin film will be restricted, which is undesirable. In addition, phosphates and carbonates are greatly involved in cross-agent applicability in the method of the present invention, and by adding a mixture of the two, the composition of the present invention can be easily dissolved or suspended in water. has.

Next, the non-water bathable fine powder used in the method of the present invention is:
The particle size and amount used have a great effect on insecticidal efficacy and crop damage, but in general, it is appropriate to use fine powder with a particle size of 50 to 350 mesh, 1 to 10 times the weight of the polymeric substance, and it is particularly preferred. is used in an amount of 0.2 to 5 times by weight. If the amount of fine powder in the grain exceeds this range, the insecticidal efficacy will of course be reduced, and there is a risk of inhibiting photosynthesis of crops and clogging the sprayer nozzle, which is not appropriate. On the other hand, if the particle size and amount are less than this, the effect of the stones in exfoliating the polymer thin film will not be sufficiently combined with the effect of the stones, which is not appropriate.

There are no particular restrictions on the type of water-insoluble fine powder, but -1
The cane used is bentonite, kaolin, talc, white clay, talc, diatomaceous earth, and other materials that are safe for humans and animals and are often used as conventional pesticides.

The surfactant used as necessary in the method of the present invention is not particularly limited other than that it is water-soluble, but when considering safety to humans and animals, harmless surfactants such as lauryl sulfate, sucrose fatty acid ester, etc. It is better to use a sexual substance. Incidentally, methods of killing pests using only surfactants have been used for a long time, and mainly utilize the spiracle-occluding effect of pests, but the surfactants used in the method of the present invention are simply It is added within the range of ordinary means for improving the dispersion or spreadability of agricultural chemicals in drug formulation methods. Furthermore, as with the surfactant, there are no particular limitations on the pH adjuster that may be added as needed, as long as it is water-soluble, and when the composition of the present invention is dissolved in water, the aqueous solution is neutral or However, if safety for humans and animals is considered, it is appropriate to use acidic or basic salts that are harmless to humans and animals.

The concentration of the aqueous composition solution used in the method of the present invention is also
The water added to the composition used in the method of the present invention affects insecticidal efficacy, crop damage, crop contamination, uniformity of spraying, discharge performance from a sprayer, difficulty in preparing an aqueous solution, etc. The appropriate amount is generally 20 to 500 times the weight of the pigeon molecule substance.

Hereinafter, actual examples of the method of the present invention will be shown and explained in more detail. However, these are only examples to facilitate understanding of the method of the present invention, and it goes without saying that the method of the present invention is not limited only to these examples, and is not limited in any way by these. In addition, all parts in the examples represent parts by weight.

Example 1 05 parts of gum arabic, 01 parts of acidic sodium pyrophosphate, 20 parts
0-300 mesh bentonite 05 parts, carbonated soda 0
125 parts, 00 sucrose fatty acid ester as a surfactant
As a result of adding 25s and dissolving it in 50 parts of water and spraying it at a rate of 20 to 601 per acre on cultivated plants where false mites live, the mortality rate of adults and larvae after 2 days and The mortality rate of eggs after 7 days is the highest
As shown in the table, both treatments were extremely effective. In addition, no symptoms of chemical damage to persimmons were observed even after severe spraying.

Table 1 Example 2 0.5 parts of gum arabic, 0.05 parts of guar gum, 0.05 parts of monobasic potassium phosphate, 0.1 part of bentonite of 250 to 300 mesh, 0.07 parts of bicarbonate of soda, and 0.03 parts of sodium lauryl sulfate, 10 to 50 parts of water. When each aqueous solution was sprayed on facility-grown eggplants inhabited by Thrilaps at a rate of 401/are, the insecticidal effect on Thrilaps and the chemical damage to eggplants were as shown in Table 2, and the insecticidal efficacy was Of course, the safety of harsh spraying on crops was also confirmed.

Table 2 Example 3 8 parts of gum arabic, 05 parts of xanthan gum, 280-3
5 parts of kaolin, 74 parts of ammonium bicarbonate, 2nd
32 parts of calcium phosphate, 32 parts of sodium 2-ethylhexyl sulfosuccinate as a surfactant, and 50 times more of Jilt Seiichisuno, which consists of 4S1 acid 02S as a pH adjuster, to the composition. Dissolve it in water and apply it to Unshu mandarin oranges, which are infested with red spider mites, at 4 per 10 ares.
When I sprayed 1 batch of 001 two times in a row, and then sprayed once again 3 days later, the death rate of two-spotted spider mite adults and larvae was 99%.
, the egg mortality rate reached 98%. In addition, no chemical damage was observed to the Satsuma mandarin oranges, and furthermore, it was observed that the dust pollution on the mandarin orange leaves was significantly cleaned after rainfall.

Example 4 10 parts of gum arabic, 1 part of carboxymethyl cellulose, 3 parts of primary calcium phosphate, 10 parts of 200-250 mesh talc, 4 parts of calcium carbonate, as a surfactant,
An insecticidal composition containing more than 0.3 parts of sodium-N-cocoylmethyltaurine was dissolved in 15 times the weight of the composition in water, and this was applied to facility-grown chrysanthemums infested with green peach aphids at a concentration of 2,001 g/10 are. Two days later, the insecticidal effect on adult aphids and larvae was as follows:
It was 96%. No chemical damage to Mada chrysanthemums was observed, and the yield and quality of chrysanthemums did not deteriorate.

Example 5 01 part of sucrose stearate was added as a surfactant to 8 parts of gum arabic, 1 part of carrageenan, 1 part of diammonium phosphorus, 4 parts of bentonite of 200 to 30 methane, and 1 part of sodium sesquicarbonate. When the composition was dissolved in 50 times the weight of water and applied to dust mites parasitic on cyclamen grown in a glass room for greenhouse horticulture, the cyclamen wilt recovered after 7 days. There was no occurrence of drug damage.

Patent applicant: Showa Denko Co., Ltd. Sanko Chemical Industry Co., Ltd. 15-

Claims (1)

[Scope of Claims] 1) Inorganic phosphates, water-insoluble fine powder, and inorganic carbonates are mixed with gum arabic or a water-soluble polymer substance mainly composed of gum arabic, and if necessary, a surfactant and a pH adjusting agent are added. 1. A method for controlling micropests, which comprises dissolving a composition obtained by adding an acidic or alkaline substance in water and spraying the composition on micropests. 2) The method according to claim 1, wherein the polymeric substance is one or more of guar gum, carrageenan, agar, xanthan gum, C, and MC1 added to gum arabic. 3) A patent claim in which the inorganic phosphates are sodium phosphate, dibasic potassium phosphate, dibasic ammonium phosphate, dibasic sodium phosphate, dipotassium phosphate, diammonium phosphate, sodium acid pyrophosphate, or potassium acid pyrophosphate. Range No. 1.1 J4 method. 4) Claim 1 in which the ruthless carbonate is charcoal 111 tunda, potassium carbonate, soda bicarbonate, or potassium bicarbonate:
+: +'4 method. 5) Method 0 of claim 1, in which the surfactant is lauryl sulfate or sucrose fatty acid ester. 6) A patent claim in which the acidic or alkaline substance used as a water-insoluble fine powder and pF (adjustment base) is a substance that is harmless to humans and animals. ■Mu I
L4 1st term method n