不同类型杀虫剂对水稻二化螟及稻纵卷叶螟的田间防治效果评价

基于同时防治水稻二化螟及稻纵卷叶螟的杀虫药剂较少的现状,2014年采用田间小区试验探索了有机磷类、沙蚕毒素类、酰肼类、多杀菌素类、取代苯基吡唑类、缩氨基脲类、噁二嗪类、大环内酯抗生素类及双酰胺类等9类16种杀虫剂对二化螟和稻纵卷叶螟的防治效果。结果表明,200g/L氯虫苯甲酰胺SC和10%阿维·氟酰胺SC能有效控制二化螟和稻纵卷叶螟危害,且速效作用好、持效期长达28d,药后7~28d对二化螟和稻纵卷叶螟的防治效果分别为84.85%~93.37%和80.40%~86.16%。60g/L乙基多杀菌素SC、1.8%阿维菌素EC、20%氟苯虫酰胺WG、40%氯虫·噻虫嗪WG、6%阿维·氯苯酰SC和10%四氯虫酰胺SC对二化螟的防治效果好而对稻纵卷叶螟有一定的兼治作用,药后7~28d防治效果分别为81.13%~97.17%和62.17%~85.26%。240g/L氰氟虫腙SC对稻纵卷叶螟的防治效果好而对二化螟有较好的兼治效果,药后7~28d防治效果分别为76.98%~92.16%和76.37%~80.98%。1%甲氨基阿维菌素苯甲酸盐ME对二化螟及稻纵卷叶螟的防治效果较好,速效性好且持效期较长,药后7~28d防治效果分别为69.29%~83.61%和68.84%~82.95%。此外,5%丁虫腈EC和30%茚虫威WG分别对二化螟和稻纵卷叶螟高效,而20%三唑磷EC、40%水胺硫磷EC、29%杀虫双AS和240g/L甲氧虫酰肼SC难以有效控制二化螟和稻纵卷叶螟危害。在水稻生产实践中,建议轮换使用双酰胺类和大环内酯抗生素类杀虫剂、乙基多杀菌素和氰氟虫腙防治二化螟和稻纵卷叶螟。

Evaluation of control efficacy of different insecticides on the striped stem borer and rice leaf-roller in the field

Based on the scarcity of insecticides for controlling the striped stem borer,Chilo suppressalis ,and rice leaf-roller,Cnaphalocrocis medinalis ,field plot experiments were conducted to investigate control efficacy of 16 insecticides from 9 series,including organic phosphorus,nereistoxin,acylhydrazines,spinosads,substituted phen-yl pyrazoles,semicarbazone,oxadiazine,macrolides antibiotics,diamides and etc,against the two pests in 2014. The results showed that excellent and quick control effect of 200 g/L chlorantraniliprole SC and 10% abamectin· flubendiamide SC on C .suppressalis and C .medinalis could be achieved within 28 days after treatment,with the control efficacies of 84.85% - 93.37% and 80.40% - 86.16%,respectively,7 - 28 days after treatment. C .suppressalis was effectively controlled by 60 g/L spinetoram SC,1.8% abamectin EC,20% flubendiamide WG,40% chlorantraniliprole·thiamethoxam WG,6% abamectin·chlorantraniliprole SC and 10% SYP-9080 SC,and C .medinalis was also controlled to some extent,with the control efficacies of 81.13%-97.17% and 62.17%-85.26%,respectively,7 -28 days after treatment.C .medinalis and C .suppressalis were obviously controlled by 240 g/L metaflumizone SC and 1% emamectin benzoate ME,and the control efficacies were 76.98%-92.16% and 76.37%-80.98%,69.29%-83.61% and 68.84%-82.95%,7-28 d after treatment.Additional-ly,C .suppressalis and C .medinalis were effectively controlled by 5% flufiprole EC and 30% indoxacarb WG, respectively,but not by 20% triazophos EC,40% isocarbophos EC,29% bisultap AC and 240 g/L methoxyfeno-zide SC.These results suggested that the rational applications of diamides,macrolides antibiotics,spinetoram and metaflumizone could be recommended for controlling C .suppressalis and C .medinalis in rice production.