Abstract
A new method, low volume application by fine dust formulations in green houses has been developed. The formulations whose mean diameters were under 5μ were applied at the rate of 300-500g/10a from the entrance of green house by knapsack-type power applicator. Fine dust applied had good floating ability and was deposited a large amount even on the back of plant leaves. The application showed flat diffusion of dust in green house having an areas of 200m2 and 1, 000m2. Polyvinyl chloride film as covering material was contaminated only slightly. Application time per 10a was about 5 minutes. Application of diazinon fine dust formulation (a. i. 20%) at 500g/10a gave 100% mortality against Myzus persica of egg-plant in large green house. Application of chlorothalonil fine dust formulation (a. i. 30%) at 500g/10a has resulted as good control effect as application of chlorothalonil wettable powder in Celletotrichum lagenarium of cucumber in large green house.
