缓释长效新药剂及轻简高效施药技术对甘蔗害虫防控效果评价

为筛选防控甘蔗绵蚜和蓟马的理想缓释长效低毒新药剂及轻简高效施药技术,选用2%吡虫啉GR根施进行田间药效试验。田间试验结果表明,2%吡虫啉GR对甘蔗绵蚜和蓟马均具有良好的防控效果,是防控甘蔗绵蚜和蓟马理想的缓释长效低毒新药剂,与其他药剂轮换使用,可延缓抗药性产生和发展。2%吡虫啉GR最适宜用量为30 kg/hm~2(有效成分600 g),可在2—6月结合甘蔗种植管理或大培土,按30 kg/hm~2用药量与40~80 kg/hm~2施肥量混匀一次性施用,对甘蔗绵蚜的防效可达98.2%以上,对甘蔗蓟马的防效可达81.1%以上;甘蔗实测产量较对照增加33390 kg/hm~2以上,甘蔗糖分较对照增加6.6%以上。缓释长效强内吸性农药与底肥追肥混匀一次性根施,施用方便,轻简高效,省工省时,环境友好,应在蔗区大面积推广应用。

Control effect evaluation of a new sustained-release and long-lasting pesticide and convenient and efficient pesticide application technology for sugarcane pestsLi Wenfeng,Pu Chunhua,Huang Yingkun,Zhang Rongyue,Yin Jiong, Luo Zhiming,Shan Hongli,Wang Xiaoyan

To screen new pesticides with ideal sustained-release, long-lasting and low-toxic to control Ceratovacuna lanigera and Baliathrips serratus, and find out convenient and efficient pesticide application technology, 2% imidacloprid GR was selected and applied in soil for field efficacy trials. The results showed that 2% imidacloprid GR had good control effect on C. lanigera and B. serratus. It was a new pesticide with ideal sustained-release, long-lasting and low-toxin to control C. lanigera and B. serratus. Therefore, we could use it with other pesticides alternately to delay drug resistance. The optimum dosage of 2% imidacloprid GR was 30 kg/hm2 (with effective ingredients of 600 g). 2% imidacloprid GR (30 kg/hm2) mixed with regular fertilizer (40-80 kg/hm2) was applied one time at sugarcane planting or'hilled up'soil between February and June. The control effect on C. lanigera and B. serratus could be more than 98.2%and 81.1%, respectively. The real yield and sucrose content increased by more than 33390 kg/hm2 and 6.6% compared with that of the control, respectively. The pesticide with sustained-release, long-lasting and strong systemic could be mixed with base fertilizer and top dressing and applied in the soil one time. This method is convenient, efficient, time saving and environment friendly, and should be applied widely in sugarcane planting area.