Bean flower thrips

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Thrips
Bean flower thrips
Bean Bean flower thrips Megalurothrips usitatus.jpg
Scientific Classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Thysanoptera
Family: Thripidae
Genus: Megalurothrips
Species: Megalurothrips usitatus
Bean flower thrips geographical distribution.PNG
Areas of confirmed M. usitatus distribution (green) and unknown (grey)
Synonyms
Bean blossom thrips

Bean flower thrips
Bean thrips
Taeniothrips usitatus
Taeniothrips longistylus Karny
Taeniothrips nigricornis (Schultz)
Physothrips usitatus Bagnall
Frankliniella vitata Schmutz
Frankliniella nigricornis Schmutz
Frankliniella obscuricornis Schmutz

Physothrips usitatus var. cinctipennis Bagnall

Bean flower thrips (Megalurothrips usitatus) are small cigar-shaped insects up to 2 mm long. The adults are dark brown with a reddish tinge. Adults lay their eggs inside leaf tissue. After feeding, the immatures drop from the plant and pupate in the soil. Generations are continual and populations are highest during warm and dry weather. Temperatures of around 20°C (68°F) favour reproduction and survival.[1]

Symptoms[edit]

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.[2]

Control[edit]

Populations of thrips can become quite large, though there is no evidence that thrips cause losses in yield. No specific control measures are needed for the management of thrips.[3]

References[edit]