Sunday, February 27, 2011

Plant pathology:Clover stunt virus on beans

Downward curving leaves and thickened stems characteristic of clover stunt virus which is spread by several species of aphid including the green peach aphid and the potato aphid. Flowers and thus bean pods do not develop. This crop of dwarf butter beans was planted in early February ,which is a difficult time of year for vegetable gardening on the warm humid coast when insect pests are at their most active.The cabbage white butterflies have been seen in vast numbers during this month.

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