Compound pesticide of biological pesticide and chemical pesticide

Abstract

The compound pesticide of the present invention consists of re-compounded bacillus thringiensis as biological produces and pyridaben as chemical pesticide, as well as proper amount of assistant and carrier. It has the weight ratio between parasporal crystal protein as the effective component of bacillus thringiensis and pure pyridaben is 0.143-7, and its optimal ratio results in one CTC to beet noctuid up to 214.2, one CTC to cotton bollworm up to 198.9 and obvious synergistic pesticidal effect. It has fast effect, spread pesticidal spectrum, less residue and low cost.

Description

technical field [0001] The invention relates to an insecticide for controlling vegetable and cotton pests such as beet armyworm and cotton bollworm, in particular to a compound insecticide compounded by biological pesticides and chemical pesticides. Background technique [0002] my country is the largest vegetable production and consumption country in the world. In 1997, the vegetable export volume was 12.2 billion yuan, ranking first in agricultural products. Vegetable production has become a pillar industry in my country's rural areas (Zhu Guoren, "Insect Knowledge", 2000 , Vol. 37 No. 1: pp. 59-63). According to the statistics of the National Bureau of Agricultural Research, the national vegetable planting area in 2000 increased by more than 1.8 million hectares compared with 1999, reaching 14.907 million hectares, an increase of 13.73%. Vegetable crops in some southern provinces and cities became the first after rice and wheat. Three major crops. W...

AI Technical Summary

Problems solved by technology

Although Bt has strong specificity, low toxicity, low control cost (for example, the retail price of 16,000IU / mgBt wettable powder is about 30,000 yuan per ton), and slow resistance development (as mentioned above, cotton bollworm in major cotton-producing areas of the country Bt is still at a sensitive level) and other advantages, but Bt also has defects such as narrow insecticidal spectrum, long working time, and easy to be affected by environmental conditions (such as not resistant to rain erosion, not resistant to ultraviolet rays, high temperature requirements), etc. These all limit the efficacy of Bt