云南澜沧甘蔗灾害性害虫防控及效果评价

Control and Effect Evaluation of Disastrous Sugarcane Pests in Lancang,Yunnan

为筛选防控甘蔗大螟和草地贪夜蛾的复合高效广谱配方药剂及高效施药技术,选用35%氯虫苯甲酰胺水分散粒剂、30%甲维盐·杀虫单微乳剂不同配方组合,采用无人机飞防开展3561 hm^(2)防控示范。结果表明:(35%氯虫苯甲酰胺WG 90 g+30%甲维盐·杀虫单ME 2250 mL+农用助剂150 mL)/hm^(2)对中后期大螟具有良好的防控效果,其螟害株和螟害节防效分别为86.58%和90.22%,防控区甘蔗产量和糖分较未防控区平均增加21452 kg/hm^(2)和3.3个百分点;(35%氯虫苯甲酰胺WG 60 g+30%甲维盐·杀虫单ME 3300 mL+农用助剂150 mL)/hm^(2)对苗期大螟和草地贪夜蛾防控效果显著,防效分别为89.53%和95.7%。本研究显示,所用2个配方药剂是防控甘蔗大螟和草地贪夜蛾理想的复合高效广谱配方药剂,可在苗期或中后期大螟及草地贪夜蛾高发期,采用无人机飞防进行叶面一次性喷施。

To screen the compound high-efficiency broad-spectrum formulation and high-efficiency application technology for controlling Sesamia inferens Walker and Spodoptera frugiperda,35%chlorantraniliprole WG and 30%emamectin benzoate×monosultap ME were selected in different formulations for 3561 hm2 control demonstration by using the unmanned aerial vehicle(UAV).The results showed that(35%chlorantraniliprole WG 90 g+30%emamectin benzoate×monosultap ME 2250 mL+agrochemical additive 150 mL)×hm^(-2)had a good control effect on S.inferens in the middle and late sugarcane growth stages.The borer-damaged stalk and internodes control effects were 86.58%and 90.22%,respectively.The sugarcane yield and sucrose content in the control area increased by 21452 kg×hm^(-2)and 3.3%on average compared with those in the non-control area.(35%chlorantraniliprole WG 60 g+30%emamectin benzoate×monosultap ME 3300 mL+agrochemical additive 150 mL)×hm^(-2)had a good control effect on S.inferens and S.frugiperda in the seedling stage.The control effects were 89.53%and 95.7%,respectively.This study indicated that these two formulations used were ideal compound high-efficiency broad-spectrum formulations for the control of S.inferens and S.frugiperda,which can be sprayed on the leaves at one time by UAV at the seedling or the middle and late stages with the high incidence of S.inferens and S.frugiperda.