Researchers from Zhenjiang Agricultural Science Institute of Jiangsu Hilly Region and Jiangsu Green Shield Plant Protection Pesticide Experiment Co., Ltd. studied the control effects of cyanofluorfen and ethreate compounding agents on rice leaf roller.
The results of indoor virulence test showed that the semi-lethal concentration (LC50) of Cnaphalocrocis medinalis was 0.8649 mg/L and the co-toxicity coefficient was 133.90 when the ratio of cyhalothrin to etofenprox was 8:5. Synergies. According to this ratio, it was processed into 26% cyanofluoromethamate suspension (16% cyanofluorfen + 10% fenthrin). The field test results showed that the mixture showed strong resistance to rice leaf roller. Stomach toxicity, contact toxicity, and persistence, the insecticidal effect of 26% cyanofluoromethrin suspension agent 600-750 mL/hm2 on rice leaf roller is 91.71%-92.63% after drug treatment; 14 to 21 days, the insecticidal effect of 26% cyanofluridate suspension agent 600 ~ 750 mL / hm2 on rice leaf roller is 80.56% ~ 95.62%, and the pesticide variety has a long-lasting effect, and it is guaranteed for rice. The effect of the leaves was good; 21 days after the drug, the leaf retention effect of 26% cyanofluoromethrin suspension agent 600-750 mL/hm2 still reached 87.76%~91.94%, which was better than the control agent fenvalerate and cyanofluorfen.
The researchers suggest that, from the perspective of control effectiveness and economy, the suitable dosage of 26% cyanomethrin suspension to control rice leaf roller is 600 ~ 750 mL / hm2, the control period should master the egg hatching period, young age At the peak of larvae, the water consumption is not less than 750 kg/hm2.
As of the end of September 2016, foreign companies exclusively registered single-dose cyanofluorfen products in China (excluding sub-package registration). Three domestic cyanofluorfen compound products were approved for registration. They are: Zhejiang Xinnong Chemical Co., Ltd. 36% cyanide chlorpyrifos colpoem (4% cyanofluorfen + 32% chlorpyrifos), the registered crops and control objects are rice stalks; 40% cyan worm of Zhejiang Xinnong Chemical Co., Ltd. · acetamiprid suspending agent (32% cyanofluorfen + 8% acetamiprid), registered crops and control objects are cabbage cabbage moth; Shenzhen Noppin Agrochemical Co., Ltd. 36% cyanofluoroindolizrate suspension ( 24% cyanofluorfen + 12% indoxacarb), registered crops and control objects are cabbage cabbage moth.
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