几种药剂及施药方式对稻纵卷叶螟的防治效果
Effects of some insecticides and the application methods on the control of riceleaffolder, Cnaphalocrocis medinalis
杨廉伟1*；陈将赞1；杨坚伟1； 戴以太2；陈素云2 ； 叶晓明2
点击：1727次 下载：0次
DOI：
作者单位：1浙江省天台县植物保护站 天台 317200； 2天台县平桥镇农业技术推广站 天台317200
中文关键词：稻纵卷叶螟， 施药技术， 防治效果， 药剂
英文关键词：rice leaf roller, Cnaphalocrocis medinalis, application methods, control effect, insecticides
中文摘要：对稻纵卷叶螟Cnaphalocrocis medinalis Guenee高龄幼虫防治药剂31%氟虫腈·三唑磷ME和当地几种常用药剂及不同施药方法对防治效果影响进行试验。结果表明：(1)毒死蜱(48%乐斯本EC)有较好速效性，药后1 d可达理想防效，三唑磷与氟出腈、氟铃脲复配的药剂（31%氟虫腈·三唑磷ME、21%氟虫腈·三唑磷EC、15%氟铃脲·三唑磷EC）药后3 d才能达到理想防效；(2)药后3 d，各处理均达到理想防效，防效依次为31%氟虫腈·三唑磷ME 15 L/hm2>31%氟虫腈·三唑磷ME 1.05 L/hm2>21%氟虫腈·三唑磷EC 1.5 L/hm2>48%毒死蜱EC 1.5 L/hm2>15%氟虫腈·三唑磷EC 1.5 L/hm2>15%阿维菌素·毒死蜱EC 1.5 L/hm2；(3)分虫龄防效统计，药后3 d供试药剂对1龄以下（施药时虫龄，后同）幼虫防效均在91%以上，对2～3 龄幼虫，31%氟虫腈·三唑磷ME保持90%以上的防效，其它处理防效明显下降，对4龄以上高龄幼虫，31%氟虫腈·三唑磷1.5 L/hm2细喷雾处理防效仍达95.6%，其它处理防效很低。(4)细喷雾可提高31%氟虫腈·三唑磷ME对稻纵卷叶螟的防治效果，尤其是对高龄幼虫，与工农16型1.8 mm孔径喷片的常规喷雾相比，1.2 mm孔径喷片细喷雾处理药后3 d防效提高5.5%，东方红18型弥雾处理防效提高7.8%，其中，弥雾处理对1～2龄幼虫防效提高4.7%，对4～5龄幼虫防效提高了20.8%。
英文摘要：The objective of this study is to compare the effects of 31% fipronil triazophos on the control of rice leaffolder Cnaphalocrocis medinalis Guene with some common insecticides, and to compare the effectiveness of different application methods. The experimental results demonstrated that: (1) 48% chlorpyrifos EC possesed the quicker knockdown effect on C. medinalis than other insecticides tested. The optimal controlling effect (OCE) was observed at one day after treatment with chlorpyrifos and at 3 days after treatment with the mixture insecticides of triazophos, fipronil and hexaflumuron (31% triazophos, fipronil ME, 21% triazophos and fipronil EC, 15% hexaflumuron and triazpphos EC). (2) All treatments provided the OCE at 3 days after application with the following effectiveness order: 31% triazophos and Fipronil ME at 1.5 L/hm2 > 31% triazophos and fipronil ME at 1.05 L/hm2 > 21% triazophos and fipronil EC at 1.5 L/hm2 > 48% Chlorpyrifos EC at 1.5 L/hm2 > 15% hexaflumuron and triazophos EC at 1.5 L/hm2 > 15% chlorpyrifos and abamectin EC at 1.5 L/hm2. (3) All the insecticides tested provided over 91% of control to the larvae under the 1st instar (at the time of insecticide treatment). When applying to the 2nd3rd instar larvae, 31% Triazophos and Fipronil ME provided the controlling effectiveness of >90%; the effectiveness for the rest of the treatments declined remarkably. When sprayed in fine mist, 31% triazophos and fipronil ME (1.5 L/hm2) still could maintain its effectiveness of 95.6% against the 4th instar larvae. In comparison, all the other treatments had lower controlling effects. (4) The application method of fine mist spray could enhance the controlling effect of 31% triazophos and fipronil ME to C. medinalis, especially for older larvae. Compared with the conventional sprayer'Gongnong 16' at 1.8 mm of nozzle diameter, the fine mist sprayer (nozzle diameter = 1.2 mm) and'Dongfanghong 18' fine mist sprayer increased by 5.5% and 7.8% of the controlling effect at 3 days after treatment, respectively. The fine mist spray with Dongfanghong 18 increased by 4.7% and 20.8% of the controlling effect to the 1st2nd instar larvae and the 4th～5th instar larvae, respectively.