采用热雾施药技术防治番茄晚疫病应用研究

Research on Prevention and Control of Tomato Late Blight by Thermal Fogger's Technology and Its Application

热雾施药技术具有高效、节水、省工省时等特点,适合设施蔬菜病虫害防治。本文采用TSP-65型热雾机喷施40%噁唑菌酮·霜脲氰悬浮剂防治温室番茄晚疫病,以常规背负式手动喷雾器为对照,比较不同施药方式下药剂雾滴沉积分布和对番茄晚疫病的防治效果。试验结果表明:(1)采用热雾机施药,植株上部、中部和下部雾滴密度分布为216.98±13.52个/cm^2、125.32±7.82个/cm^2和55.28±10.45个/cm^2,药剂总沉积率为32.33%,采用背负式喷雾器施药,药剂总沉积率为22.38%,热雾机施药具有更高的药剂沉积率;(2)热雾机施药用水量为4L/667m^2,喷雾时间为5min/667m^2,背负式喷雾器用水量为60L/667m^2,喷雾时间为60min/667m^2,采用热雾机防治番茄晚疫病每亩可以节约用水56L,节约时间55min;(3)在相同施药剂量下,热雾机喷施40%噁唑菌酮·霜脲氰悬浮剂,对番茄晚疫病的防治效果为84.22%,手动喷雾器对番茄晚疫病的防治效果为69.94%,热雾施药技术具有更高的防治效果。

Thermal fogger technology is applicable for prevention and control of plant diseases and insects on various kinds of vegetables, with the characteristic of high efficiency, water - saving and time - saving. In this paper, the TSP - 65 thermal fogger was used to spray famoxadone ＋ cymoxa- nil 40% SC to control tomato late blight in the greenhouse, using knapsack sprayer as the control group. The difference between two application methods were investigated on the droplets deposition distribution and the control effect for tomato late blight. The following 3 results could been obtained from the trials ： （ 1 ） For thermal fogger application, the droplets density distribution on the upper, middle and lower parts of the plant was 216.98 ＋ 13.52/cm2, 125.32 ~ 7.82/era2 and 55.28 -＋ 10. 45/cmz, respectively, with the tested product deposition rate of 32.33% compared to that of 22.38% of the control group, which demonstrated that the thermal fogger provided a higher pesti- cide deposition rate. （2） In the trials, it used 4L water and took 5 minutes per 667mz for thermal fogger application to control tomato late blight in tomato greenhouse, while for the control group, 60 L water and 60 minutes were required, which demonstrated that thermal fogger application could save 56L water and 55 minutes per 667m2. （3） Under the same application doses, the controls a- gainst tomato late blight were 84. 22% and 69. 94% for using thermal fogger and knapsack sprayer respectively, and thermal fogger technology could provide a higher control effect.