CN112042638A - Pesticide preparation for preventing and treating mealybugs in pineapple - Google Patents

Abstract

The invention belongs to the technical field of pesticide research and development, and particularly relates to a pesticide preparation for preventing and treating mealybugs in pines and application thereof. A pesticide preparation for preventing and treating mealybugs is a suspoemulsion, and active ingredients comprise buprofezin and mineral oil; and the mass ratio of the buprofezin to the mineral oil is 1:20-10: 1. The pesticide preparation is used for preventing and treating the mealybugs with pines. The pesticide preparation of the invention shows different biological activities on the mealybugs and has a synergistic effect on the mealybugs when the ratio of the buprofezin to the mineral oil is 1:10-1: 5.

Description

A kind of pesticide preparation for controlling pineapple powder scale

technical field

The invention belongs to the technical field of pesticide research and development, and in particular relates to a pesticide preparation for preventing and treating pineapple scale and application thereof.

Background technique

The pineapple clean mealybug, also known as the pineapple progenitor mealybug, belongs to the order Homoptera, the mealybug family, and is widely distributed in pineapple producing areas around the world. According to reports by Hawaiian scholars, there are two main types of mealybugs that harm pineapples, namely pineapple clean mealybug and new pineapple gray mealybug. In my country, it has long been reported that the pineapple mealybug damages pineapple, while the new pineapple mealybug damage to pineapple has not been reported, but in recent years, it has developed into a major pest of sisal in Guangdong and Hainan. The pineapple clean mealybug parasites on the base, fruit, bud and root of pineapple leaves, sucking the juice, making the pineapple plant weak and the fruit stunted. At the same time, pineapple mealybugs (Pineapple zebra and new pineapple mealybugs) are important diseases of pineapple and the main vector of pine wilt disease.

The medicament provided by the invention can effectively prevent and control the pineapple scale, and further achieve the purpose of controlling the pine wilt disease by preventing and controlling the transmission medium.

SUMMARY OF THE INVENTION

The present invention specifically relates to a pesticide formulation for preventing and treating pineapple scale and its application.

The technical scheme provided by the present invention is as follows:

A pesticide formulation for preventing and treating pineapple scale, the pesticide formulation is a suspoemulsion, and its active components comprise thiazide and mineral oil; and the mass ratio of thiazide and mineral oil is 1:20-10:1.

Preferably, in the pesticide formulation, the mass ratio of the thiazide to the mineral oil is 1:10-1:5.

Preferably, the pesticide formulation further includes other auxiliary materials: one or more of wetting agents, dispersing agents, emulsifiers, thickening agents, antifreezing agents, defoaming agents, and deionized water.

Preferably, in the pesticide preparation, the percentage content of active ingredients is 5-60%.

Preferably, in the pesticide formulation, the percentage content of active ingredients is 10-50%.

The present invention also provides the use of the pesticide formulation for preventing and treating pineapple scales.

Compared with the prior art, the present invention has the following beneficial effects:

(1) in the pesticide formulation of the present invention for preventing and treating pineapple scale, the combination of thiazide and mineral oil shows different biological activities to pineapple scale, when the ratio of thiazide and mineral oil is 1:10-1 When the ratio of thiazide and mineral oil was 1:1-10:1, 1:20, it showed synergistic effect on the pineapple cleanse.

(2) The suspoemulsion prepared by the present invention has excellent formulation performance.

Detailed ways

The present invention can be better understood from the following examples. However, those skilled in the art can easily understand that the contents described in the embodiments are only used to illustrate the present invention, and should not and will not limit the present invention described in detail in the claims.

Embodiment 1 : Toxicity determination of compound composition to pineapple clean powder scale

Insect source for the test: pineapple mealybug, collected from the field, cultivated indoors to the next generation, and selected the mealybug with basically the same development as the test insect source.

Test drugs: thiazide original drug (content is 95%), mineral oil (content is 95%), all of which are commercially available.

Test method: Select leaves of the same size, remove other insects with the tip of a brush, keep healthy insects of the same age, pick them into a petri dish with a diameter of 9 cm, use the dipping method, and use tweezers to clamp the leaves with the mealybugs and immerse them into the test. Put it in the liquid for 10s. After taking it out, use absorbent paper to absorb the liquid on the leaves, dry it for a while, and then move it into a petri dish covered with filter paper, seal it with plastic wrap with small holes, 30-40 heads per dish, Then placed in an artificial climate box for rearing, and observed and recorded the number of dead mealybugs 7 days after the treatment. The death criterion is that the worm body is dark in color, shriveled, or there is no reaction when the worm body is touched with a brush, and it is regarded as dead. The experiment was repeated 3 times, and a clear water control was set.

Calculation method: The virulence regression equation, lethal concentration LC50, correlation coefficient, CTC and other parameters were calculated by Excel.

Adjusted mortality (%)=(survival rate of control group-survival rate of treatment group)/survival rate of control group×100.

The test results are shown in Table 1.

Table 1 Determination of the toxicity of the compound composition on the pineapple clean powder scale and its combined action

It can be seen from Table 1 that the combination of thiazide and mineral oil showed different biological activities on the pineapple scale. Synergistic effect; when the ratio of thiazide and mineral oil is 1:1-10:1, 1:20, it has an additive effect on pineapple cleanse.

Embodiment 2 : the preparation of thiazide pesticide suspoemulsion

①48% thiazide·mineral oil suspoemulsion

Thiazinone 8%, mineral oil 40%, calcium lignosulfonate 5%, pull powder 3%, agricultural milk 600#4%, agricultural milk 1601# 7%, gum arabic 3%, ethylene glycol 2%, Silicone 1%, deionized water to make up 100%.

Its preparation method is as follows:

Suspended phase preparation: Mix thiazide with wetting agent, dispersing agent, antifreeze agent, defoamer and part of deionized water evenly, and carry out secondary sanding through a sand mill, so that the particle size is less than or equal to 5 microns;

Preparation of water-emulsion phase: Mix mineral oil and emulsifier evenly, then add it into water, and cut it in a high-speed shearing machine for 10-30min to form an O/W emulsion;

The suspension phase is mixed with the water-emulsion phase, sheared and emulsified again in a high-speed shearing machine, and a thickener is added and stirred at a low speed to prepare a suspoemulsion.

②33% thiazide·mineral oil suspoemulsion

Thiazinone 3%, Mineral Oil 30%, Calcium Lignosulfonate 2%, NNO 7%, Agricultural Milk 1601#8%, Xanthan Gum 2%, Ethylene Glycol 2%, Silicone 0.5%, Deionized Water Top up 100%.

Its preparation method is as follows:

Suspended phase preparation: Mix thiazide with wetting agent, dispersing agent, antifreeze agent, defoamer and part of deionized water evenly, and carry out secondary sanding through a sand mill, so that the particle size is less than or equal to 5 microns;

Preparation of water-emulsion phase: Mix mineral oil and emulsifier evenly, then add it into water, and cut it in a high-speed shearing machine for 10-30min to form an O/W emulsion;

The suspension phase is mixed with the water-emulsion phase, sheared and emulsified again in a high-speed shearing machine, and a thickener is added and stirred at a low speed to prepare a suspoemulsion.

Example 3 : Determination of physicochemical properties of suspoemulsion

The determination methods of various performance indicators of the product refer to the requirements on suspoemulsion and relevant national standards in the "FAO and WHO Pesticide Standards Formulation and Use Manual".

Active ingredient content: determined by HPLC;

Dumpability: according to CIPACMT148.1;

Wet sieve experiment: according to GB/T16150-1995;

Dispersion stability: according to CIPACMT180;

Thermal storage stability: according to GB/T19136-2003;

Cold storage stability: according to GB/T19137-2003.

Table 2 Determination of physical and chemical properties of suspoemulsion

As can be seen from Table 2, each performance index of the 48% thiazinone·mineral oil suspoemulsion prepared in the above-mentioned embodiment 2 and the 33% thiazinone·mineral oil suspoemulsion all conform to the "FAO and WHO Pesticide Standard Formulation and Use Manual" Requirements and relevant national standards for suspoemulsions in China.

The above are only the preferred embodiments of the present invention. For those skilled in the art, appropriate improvements can be made without departing from the raw materials of the present invention, and these improvements are also within the protection scope of the present invention.

Claims (6)

1. The pesticide preparation for preventing and treating the mealybugs is characterized in that the pesticide preparation is a suspoemulsion, and the active ingredients of the pesticide preparation comprise buprofezin and mineral oil; and the mass ratio of the buprofezin to the mineral oil is 1:20-10: 1.

2. Pesticide formulation according to claim 1, characterized in that the mass ratio of buprofezin to mineral oil is from 1:10 to 1: 5.

3. The pesticide formulation as set forth in claim 1 further comprising one or more of a wetting agent, a dispersing agent, an emulsifier, a thickener, an antifreeze, an antifoaming agent and deionized water.

4. The pesticide formulation as set forth in claim 3 wherein the active ingredient is present in an amount of 5 to 60% by weight.

5. The pesticide formulation as set forth in claim 4 wherein the active ingredient is present in an amount of 10 to 50% by weight.

6. Use of the pesticidal formulation according to any one of claims 1 to 5 for controlling mealybugs pineapple.