農薬の効率的施用法に関する技術開発と普及
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概要
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The efficient applications of pesticide have been developed and diffused since 1953. 1. The spray by long size boom nozzle was tested against rice stem borer, Chilo suppressalis, with parathion E.C. in 1954. The spray was obtained effective results better than spray by conventional spray nozzle. 2. The physical properties of dust was studied for aerial dusting with helicopter from 1966 to 1972. The flower bility from duster of helicopter was obtained proportionally results to angle of slope and inproportionally to bulk density. The physical properties for check of large coagulative dust were dispersibility by Ueda method, 20-40. 3. We examined the relation between the efficiency of dusters with boom type below head and the physical properties of dust. When the dispersibility became larger, the remaining quantity of dusts inside the boom decreased. The dusts were inclassified usually to high and low content of active ingredient. Against pestes of rice plant, the effects of dusting with 20, 55 and 110 meters long boom were the same as conventional dusting. 4. The aerial ULV spray was studied by the small apparatus we developed from 1965 to 1970. For the ULV spray many pesticides was used for the control of major diseases and insect pests of rice plant. The pesticides obtained good effectiveness against major pests was malathion, fenitrothion, Kasugamycin of antibiotic etc. The registration of these pesticides was accepted in 1969, and aerial ULV spray developed covering more than about 0.6 million hectares of farm land and forest area in 1979. 5. The new granules was studied against major pests of rice plant from 1968 to 1973. The fine micro-granul (62-210μ) was selected best granul pesticide against major pests of rice plant in 1973. 6. 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 300-500 g/10 a from the entrance of green house by knapsack-type power applicator. The registration of several pesticides using this new method was accepted in 1979. 7. The pest control by foam spray was studied for safty spray method from 1973 to 1975. The foam spray is used by few pesticides in 1978.
- 日本農薬学会の論文
- 1980-05-20