Toxicity and Control Effect of Several Pesticides to Diaphorina citri Kuwayama
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摘要: 在室内条件下, 采用浸虫法测定了10种杀虫剂对柑橘木虱的毒力, 结果表明, 高效氯氟氰菊酯和溴氰菊酯对柑橘木虱成虫具有较高的毒力, 其24h的LC50值分别为2.116、3.030mg·L-1, 而吡蚜酮、螺虫乙酯和吡虫啉毒力较差, 尤其以吡蚜酮的毒力最差, 其24h的LC50值为2 025.489mg·L-1;采用灌根施药法测定了4种内吸性杀虫剂对柑橘木虱成虫的防效, 4种供试验药剂各处理对柑橘木虱成虫的短期效果较差, 但10%烯啶虫胺2 000倍液、70%吡虫啉14 000倍液及7 000倍液处理灌根施药后1428d对柑橘木虱成虫的防效均保持在87%以上, 至药后28d防效高达97%以上, 持效期长。Abstract: The toxicity of 10pesticides and field control efficacy of 4systemic pesticides to Diaphorina citri were tested with dipping and root pouring respectively for effectively controlling the citrus psylla.The result of indoor determination showed that, after 24htreatment, the toxicity of pesticides against Diaphorina citri in LC50 of lambda-cyhalothrin and decamethrin was 2.116and 3.030 mg·L-1, respectively, which were higher than it of Pymetrozine, spirotetramat and Imidacloprid.The lowest toxicity was pymetrozine with LC50 2 025.489mg·L-1. Though the effect of 4systemic pesticides controlling citrus psylla in the field was low in short term with root pouring treatment, the control effects of 10% nitenpyram AS 2 000times、70%imidacloprid WG 14 000times and 7 000times were maintained at 87%during the 14-28dof the treatment and even reached higher than 97%28days after treatments.
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Key words:
- Diaphorina citri Kuwayama. /
- toxicity test /
- dipping /
- root pouring
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