トマトに対するBeauveria bassiana水和剤のブロワー処理高度の検討

抄録

We examined the optimal height for dusting tomato plants with Beauveria bassiana wettable powder using an electric hand blower. Conidia were detected mainly in the leaflets at a height of 60–100 cm when dusting was performed from a height of >40 cm from the ground; however, they were hardly detected in the leaflets in the same area when dusting was performed near the ground. When greenhouse tomatoes were dusted from a relatively mid-level height every 7 days, the reduction in the number of Bemisia tabaci larvae was similar to that achieved by spraying a 1,000 times diluted solution. Therefore, dusting tomato plants with B. bassiana wettable powder from a mid-level height helps to prevent B. tabaci infestation.