ベンジルジチオカーバメート系除草剤に関する研究 : 第2報水稲に対する作用について

概要

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The concentrations of 50 percent inhibition of growing roots (LC_<50>) in the 3rd leaf stage of rice plants were about 100 ppm in the three benzyldithiocarbamates, TDW-63, 39 and 43, respectively, while 3 ppm in nitrofen (NIP, TOK). The minimum inhibitory concentrations (MIC) were 25 ppm in the formers and 0.8ppm in the latter. In the usual dosage of application, it was found that the three benzyldithiocarbamates were safer for 11 times than nitrofen. At the dosages of practical herbicidal activity, TDW-63, 39, and 43 had no phytotoxicities on rice plants transplanted just after the soil incorporation of these herbicides. Soil treatment of these benzyl-dithiocarbamates after transplantation of rice seedlings showed no phytotoxicity even in the shallow planting, where pentachlrophenol gave phytotoxicity. In the soil treatment after transplanting, water depth showed no effect on the phytotoxicity on rice plants. In the case of soil application in direct sowing or transplanting culture, no interaction was observed with insecticides and fungicides such as organo-phosphorus group, carbamate group, pentachlorophenyl derivatives, and antibiotics.
日本雑草学会の論文
1968-12-25