Abstract
Seasonal occurrence of insects pests was investigated on leaf vegetables, ‘komatsuna’ (crucifer) and ‘shungiku’ (garland chrysanthemum) in greenhouses in 2003. Damage to ‘komatsuna’ caused by leafminer flies, striped flea beetle, moths and slugs was detected in May, in August-September, in April-June, August and November and in April-May, respectively. Damage to ‘shungiku’ caused by leafminer flies, thrips, moths and slugs was detected in April-May, in June-July, in June-July and November and in April-May, respectively. Covering house-side slit with silver 1mm mesh size net and using solar radiation by covering grand with transparent polyvinyl chloride were useful for reducing the damage of leafminer flies and large size moths on ‘komatsuna’ and the damage of leafminer flies, thrips and large size moths on ‘shungiku’
