카바릴과 석회유황합제의 양봉꿀벌(Apis mellifera)과 서양뒤영벌(Bombus terrestris)에 대한 엽상잔류독성 평가

Pollination is the important natural process for fruiting. However, too high fruit bearing leads to lower quality fruit production. Thus, the flower and fruit thinning is becoming crucial. The use of the chemical agents such as carbaryl and lime sulfur is increasing because of the labor and cost benefit. We tested the foliage residual toxicity of two chemicals against the honey bee and bumble bee along with DAT (days after treatment) on buckwheat. Results indicated lower toxic effect of lime sulfur on both honey bee and bumble bee. Carbaryl showed low toxic only on bumble bee but high toxic on honey bee. Residual toxicities were higher than 60% even until 21 DAT. Foliar residues were 180, 110 and 18 ppm of carbaryl at 1, 10 and 18 DAT, respectively. This study suggests that lime sulfur is relatively safe to both bees and carbaryl is less toxic to bumble bee, B. terrestris but highly toxic to honeybee, A. mellifera even until 21 DAT.