ヘラオモダカに対するピペロホス・ジメタメドリン粒剤の作用性

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The effect of 102, a granular formulation of the mixture of 4.4 % (w/w) piperophos and 1.1 %(w/w) dimethametryn, on Alisma canaliculatum A. Br. et Bouche was studied throughout the activities of its active ingredients in respect of various enviromnental conditions. Also, the effect of simetryne which has been used very widely in Japanese paddy fields was studied. The results obtained were summarized as follows: 1) Because dimethametryn was remarkably effective against A. canaliculatum and piperophos did not show any effect, the effect of CG 102 on A. canaliculatum seemed to depend on the effect of dimethametryn. But CG 102 was more effective than dimethametryn alone. 2) Although the effect of simetryne was remarkably reduced under water leakage condition, those of CG 102 and dimcthametryn were not. 3) The fluctuation of the effects of CG 102 and dimethametryn due to the growth stages of A. canaliculatulm were not recognized under water leakage condition at the rate of 3 cm/day in water depth. And CG 102 showed a practical effect on A. canaliculatwn less than 6.2-leaf stage under water leakage condition even at the rate of 5 cm/day in water depth. The effect of simetryne was hardly influenced by the growth stages and the effect was reduced by water leakage at the rate of more than 3 cm/day regardless of the growth stages. 4) The effects of CG 102, dimethametryn and simetryne were not influenced by temperatures. But the effect of simetryne was reduced by water leakage regardless of temperature.
1977-12-25

ヘラオモダカに対するピペロホス・ジメタメドリン粒剤の作用性

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