AVRDC International Cooperators'
Mungbean Insect Pests
Flowers and flower parts are brown, dried, or completely
destroyed. The flowers drop early. The petioles and leaves
have tiny holes surrounded by discolored areas. Pod
production is low and pods are deformed.
Modified piercing-sucking mouthparts. These insects are very
small and silver-shaped, about the size of a flea. They are just
barely visible to the naked eye. The young are white, whereas
adults are dark brown with a reddish tinge.
Where to look
Bean thrips prefer to feed on the flower. Inspect the flower, especially around its
reproductive parts. These insects remove plant cell contents and also feed on pollen.
Inspect the undersides of leaves that appear brown or dry. The areas around the mid-
vein are likely to harbor thrips.
Adults lay their eggs inside the leaf tissue. After the immatures have completed
feeding, they drop form the plant and pupate in the soil. Generations are continual and
populations are highest during warm and dry weather. Temperatures of around 20¢XC
favor reproduction and survival.
To be added later.
Last updated: 2001.
Information from: Field Guide: Insect Pests of Selected Vegetables in Tropical and Subtropical
Asia. 1995. B.L. Parker, N.S. Talekar and M. Skinner. Publication 94-427.
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