Method for improving the effect of chemical agent for preventing and curing lepidopterous pests

Abstract

The invention discloses a method of improving the control effects of the lepidoptera pest of a medicine, belonging to the pest control technical field. The method is as follows: (1) the indoxacarb and the chlopyrifos are mixed according to the ratio 1:7-35 of the percentages by weight of the active ingredient of indoxacarb and the percentages by weight of the active ingredient of chlopyrifos; (2) with 8 to 40 grams of active ingredients for each mu is added with 30 to 60 liters of water to make the water solution; (3) during the crop lepidopterous larvae prime, the water solution is sprayed on the crop. The compound insecticide is capable of an oblivious synergistic action, the cotoxicity coefficient is more than 300, the drug resistance of pest is delayed, the pesticide use cost for each mu is lowered, the cost is reduced from 12 to 15 yuan for the indoxacarb single agent to 5 to 7 yuan for the mixing agent, the prevention and cure spectrum is enlarged and the high efficiency pesticide application time is prolonged. The method can be applied to control the lepidoptera pest and other pests of such crop as rice and vegetables etc.

Description

Technical field [0001] The invention belongs to the technical field of prevention and control of agricultural pests, in particular to a compound use method for improving the effect of the original medicament for preventing and treating lepidopteran pests. Background technique [0002] Cnaphalocrocis medinalis, Spodoptera litura, Plutella xylostella, etc., belong to the order of Lepidoptera and are the main pests of rice and vegetables. In recent years, their occurrence has been serious and has caused a greater impact on the above-mentioned production. At the same time, the rise of today’s pollution-free agriculture puts forward new requirements for the use of pesticides. The use of highly toxic, highly toxic, high-residue, carcinogenic, teratogenic, and mutagenic pesticides is clearly prohibited, and the amount, concentration, and period of use of pesticides available Etc. have been strictly controlled. [0003] In the past, indoxacarb (indoxacarb) has a good control effect on ri...

AI Technical Summary

Problems solved by technology

[0003] In the past, although indoxacarb had a good control effect on rice leaf roller, Spodoptera litura, diamondback moth, etc., its use cost was high (12-15 yuan / mu), and its insecticidal spectrum Narrower ones are only effective against Lepidoptera pests, but not effective against other pests; although chlorpyrifos (chlorpyrifos) has a low cost (2-5 yuan / mu), and is a broad-spectrum insecticide, it is effective against most pests , but its effect on young larvae of rice leaf roller, Spodoptera litura, and diamondback moth is better, with a control effect of more than 80%, but the effect on older larvae of the above-mentioned pests is not good, generally only about 60%, so Its efficient spraying period is narrow

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