Preparation and application of synergistic chlorpyrifos for poisoning contarinia citri barnes

Abstract

The invention relates to a method for manufacturing chlorpyrifos capable of homicidally poisoning Contarinia citri Barnes. Thechlorpyrifos is manufactured by the following raw materials (wt. parts) at normal temperature and under normal pressure: mixing 20mL chlorpyrifos emulsifiable stock solution 1 containing 48% active component and water 100-250 to obtain liquid A, mixing high polymer mastic stock solution 0.1kg as 1 and water 47-275 to obtain liquid B, mixing liquid A and B at a ratio of 1:0.4-8 uniformly to obtain liquid C containing high polymer mastic stock solution 0.1%-2%, chlorpyrifos emulsifiable stock solution 0.05%-0.2% and water 97.8%-99.85%. Shrubs and weeds in the fruit woodland should be cleaned before the chlorpyrifos is applied. Thechlorpyrifos is sprinkled for homicidally poisoning Contarinia citri Barnes of carya, orange and pear tree at the beginning of the Contarinia citri Barneseclosion and aging larvae burying themselves for hibernalisation. The chlorpyrifos has the advantages of delayed release, good adsorption and membrane forming effect, significant insect disinfestations, and is free from the weather interference.

Description

technical field [0001] The invention relates to a method for preparing and applying a synergistic pesticide. Background technique [0002] The pesticide Lesben sold in my country, the common name is chlorpyrifos, O, O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate, the active ingredient content is 480g / L , 48% EC is a broad-spectrum insecticide produced by Dow AgroSciences. It has three modes of action: contact killing, stomach poisoning, and fumigation, and it has poisonous effects on both aboveground and underground pests. [0003] Bud maggots (Contarinai sp) belong to Diptera, and are the main pests of hickory, tangerine, pear and other fruit trees during the flowering period. The pest has one generation per year, and the mature larvae survive the winter in the topsoil of the woodland. In the Hangzhou area of ​​my country, they begin to pupate in late March of the following year, and emerge in early April when the hickory and other fruit trees just bloom. Fly arou...

AI Technical Summary

Problems solved by technology

Regardless of the method, under the condition of mastering the growth law of flower bud maggots and applying pesticides in a timely manner, the insecticidal efficiency is within a certain range of values, and no significant breakthrough will occur. One of the main reasons is caused by the limitations of pesticides themselves. , such as cloudy and rainy weather, rapid drug release, etc., as well as the complex structure of forest vegetation, dense cover, uneven plant heights, resulting in uneven spraying and uneven spraying, etc., all of which make Leqiben unable to fully function

[0005] After retrieval and market investigation, no data or actual facts have been found on the use of synergistic Lespen and the corresponding spraying methods when poisoning the bud maggots of hickory, orange, and pear pests