缓释长效多功能新药剂对甘蔗螟虫和绵蚜防控效果评价

为筛选防控甘蔗螟虫和绵蚜的缓释长效低毒低风险多功能配方新药剂及精准高效施药技术,选用10%杀虫单·噻虫嗪颗粒剂和1%Bt·噻虫胺颗粒剂根施进行田间药效试验。田间试验结果表明:10%杀虫单·噻虫嗪颗粒剂和1%Bt·噻虫胺颗粒剂对甘蔗螟虫和绵蚜均具有良好的防控效果,是防控甘蔗螟虫和绵蚜理想的缓释长效低毒低风险多功能配方新药剂,与其他药剂交替使用,可延缓害虫抗药性产生和发展。两种药剂田间使用最适宜用量均为45 kg/hm^2,可在1—7月结合新植蔗下种、宿根蔗管理或大培土,按每公顷用药量45 kg与每公顷施肥量1200～1800 kg混合均匀一次性撒施于蔗沟、蔗桩或蔗株基部覆土或全膜盖膜,对螟害枯心苗的防效可达79.2%以上,对甘蔗绵蚜的防效可达98.8%以上;甘蔗实测产量和糖分分别较对照增加41555 kg/hm^2和6.5%以上。缓释长效强内吸性多功能新药剂与底肥追肥混匀一次性根施,施用方便,精准高效,省工省时,环境友好,值得在蔗区大面积推广应用。

新型配方生物制剂不同施药方法对中后期条螟白螟防控效果评价

为筛选防控中后期甘蔗条螟白螟的新型配方生物制剂及精准高效施药技术,选用72%苏云·杀单可湿性粉剂、8%氯氟氰·甲维盐悬浮剂和3.6%氯氟氰·苏云悬浮剂进行人工和无人机飞防喷施田间试验研究。试验结果表明:72%苏云·杀单可湿性粉剂、8%氯氟氰·甲维盐悬浮剂9月中旬喷施对中后期甘蔗条螟白螟螟害株和螟害节均具有良好的防控效果。72%苏云·杀单可湿性粉剂3000 g/hm^2和8%氯氟氰·甲维盐悬浮剂750 mL/hm^2,每公顷用药量兑水900 kg,每公顷兑飞防助剂及水15 kg,叶面喷施对螟害株率的防效可达81.3%以上,对螟害节率的防效可达88.6%以上。本研究显示72%苏云·杀单可湿性粉剂、8%氯氟氰·甲维盐悬浮剂是防控中后期甘蔗条螟白螟理想的新型配方生物制剂,可在9月中旬人工和无人机飞防叶面喷施。

Prevention and Control Effects of New Biological Formulations Sprayed by Different Methods on Proceras venosatus (Walker) and Tryporyza intacta Snellen in Middle and Late Stages

To screen new biological formulations, accurate and efficient application technology, field test was conducted with 72% Bacillus thuringiensis(Bt)·monosultap WP, 8% lambda-cyhalothrin·emamectin benzoate SA and 3.6% lambda-cyhalothrin·Bt SA through manual spraying and unmanned aerial vehicle spraying. Test results and comprehensive evaluation analysis demonstrated that 72% Bt·monosultap WP and 8%lambda-cyhalothrin·emamectin benzoate SA by manual spraying and unmanned aerial vehicle spraying had good prevention and control effect on strains and internodes damaged by Tryporyza intacta Snellen in middle and late stage, which were ideal new biological formulations with high effi-ciency and low risk for prevention and control of T. intacta in middle and late stage, and could be popularized in sugarcane area. 72% Bt·monosultap WP at the dose of 3 000 g/hectare and 8% lambda-cyhalothrin·emamectin benzoate SA at the dose of 750 mL/hectare could be sprayed in mid September at the peak occurrence period of the forth and fifth generations of T. intacta and Proceras venosatus. Agents were diluted with 900 kg water per hectare, and manually sprayed with electric knapsack sprayer; or agents were diluted with 15 kg of Haoyang aerial control special addi-tives and water per hectare, and sprayed with unmanned aerial vehicle. The control effect against borer-damaged strain rate was above 81.3% and that against borer-damaged internode rate was above 88.6%.