9种农药对三红蜜柚柑桔全爪螨的田间防效评价

    Evaluation of the Field Control Effect of Nine Kinds of Pesticides on Panonychus Citri in Sanhong Miyou

    • 摘要: 为建立柑桔全爪螨绿色防控的农药使用技术,选取目前我国绿色食品生产允许使用的9种农药在福建省福清市三红蜜柚果园对柑桔全爪螨进行田间防效研究。结果表明:20%乙螨唑悬浮剂3 500倍液、22.4%螺虫乙酯悬浮剂4 500倍液和43%联苯肼酯悬浮剂2 500倍液速效性好,持效期长,防效高,是防治柑桔全爪螨的有效药剂,适合在三红蜜柚生产上推广应用;99%矿物油225倍液和240 g·L-1螺螨酯悬浮剂5 000倍液速效性不好,但持效期较长,可以与其他速效性好的药剂混合使用;20%苯丁锡悬浮剂1 500倍液速效性差,持效性一般,可能与试验期间温度相对较低有关;5%噻螨酮乳油1 650倍液、20%四螨嗪悬浮剂1 800倍液和5%唑螨酯悬浮剂1 500倍液速效性和持效性表现都不佳,应适当提高各自单剂使用浓度或停止使用或与其他药剂进行科学复配混合使用。建议在柑桔全爪螨密度较高时使用乙螨唑、螺虫乙酯、联苯肼酯等速效性和持效性好、防效高的农药;在柑桔全爪螨发生早期或密度较低时可使用矿物油、螺螨酯等速效性相对较差但持效期长的农药,并适当增大剂量或者与其他速效性好的农药混配以提高防效。

       

      Abstract: In order to establish the pesticide application technology for the green prevention and control of Panonychus citri, nine kinds of pesticides allowed for the production of green food in China were selected to study the field control effect on Panonychus citri in the orchards of Sanhong miyou in Fuqing City of Fujian Province. The results showed that 20% etoxazole suspension concentrate of 3 500 times dilution, 22.4% spirotetramat suspension concentrate of 4 500 times dilution and 43% bifenazate suspension concentrate of 2 500 times dilution had good quick-acting property, long effective duration and high prevention effect, which were the effective insecticides for the prevention and control of Panonychus citri, and suitable for the promotion and application in the production of Sanhong miyou. 99% mineral oil of 225 times dilution and 240 g·L-1 spirodiclofen suspension concentrate of 5 000 times dilution had poor quick-acting property but long effective duration, and could be mixed with other agents with good quick-acting property. 20% fenbutatin oxide suspension concentrate of 1 500 times dilution had poor quick-acting property and general effective duration, which might be related to the relatively low temperature during the experiment. 5% hexythiazox oil concentrate of 1 650 times dilution, 20% clofentezine suspension concentrate of 1 800 times dilution and 5% fenpyroximate suspension concentrate of 1 500 times dilution all showed poor performance in terms of the quick-acting property and effective duration. Therefore, the concentration of each single agent should be appropriately increased, or the single agent should be discontinued or mixed scientifically with other agents. It was suggested that the pesticides such as etoxazole, spirotetramat, and bifenazater with good quick-acting property & effective duration and high control efficiency when the density of Panonychus citri was high. The pesticides such as mineral oil and spirodiclofen with relatively poor quick-acting property but long effective duration could be used in the early stage of the occurrence of Panonychus citri or when it was at low density, and the control effect would be improved by appropriately increasing the dosage or mixing with other pesticides with good quick-acting property.

       

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