AN Guo-dong
Abstract
The plot test of pymetrozine 50% WDG against Nilaparvata lugens was investigated.The results showed that at the concentration of 180,240,300 g/hm2 the control efficacy of pymetrozine reached 64.28%~86.35% for 3,7 and 14 d after application.And there was no phyto-toxicity during the trial period.So it is worth taking further application.
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The plot test of pymetrozine 50% WDG against Nilaparvata lugens was investigated.The results showed that at the concentration of 180,240,300 g/hm2 the control efficacy of pymetrozine reached 64.28%~86.35% for 3,7 and 14 d after application.And there was no phyto-toxicity during the trial period.So it is worth taking further application.
Key concepts: Toxicology, Biology