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- W2369018807 abstract "[Aims] The purpose of this paper is to detect the chlorpyrifos residues on paddy rice at different dosages.[Methods] Gas Chromatographs Agilent 6890 is used to test pesticide residuals on Yongyou 6 Paddy Rice, which is sprayed by 360-1080 mL a.i./ha of chlorpyrifos 15, 20, 30, 40 days before harvest respectively. [Results] The results showed that the more times and dosage using, the more pesticide residues, and seriously higher in rice husk than in brown rice. Spray one time at the dosage of 1 080 mL a.i./ha at 15 days before or three times with the dosage of 720 mL a.i./ha at 40, 30, 20 days before, the pesticide residues were more than 0.1 mg/kg in brown rice. Chlorpyrifos was effective to control rice planthopper, and was high toxin to cyrtorrhinus lividipennis but low toxin to spiders. In addition, the spider is far less impacted than cyrtorrhinus lividipennis in the biological control agent study. [Conclusions] It was suggested to use chlorpyrifos at the dosage of lower than 1 080 and 720 mL a.i./ha 30 and 15 days before harvest respectively, and the times of spray should be controlled as few as possible." @default.
- W2369018807 created "2016-06-24" @default.
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- W2369018807 date "2013-01-01" @default.
- W2369018807 modified "2023-09-23" @default.
- W2369018807 title "The Safe Use of Chlorpyrifos in Rice Field and Effects on Rice Planthopper and Its Natural Enemies" @default.
- W2369018807 hasPublicationYear "2013" @default.
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