Eight common insect pests - Yellow mealworm
Yellow mealworm
These insects are the largest found in stored grain. They are not common pests on farms. They infest animal feed and stored grain that is going out of condition.
Appearance and behaviour
The adult:
- Is a black beetle about 1.5 centimetres long
The larvae:
- Are yellow and 0.2 to 2.8 centimetres long
Yellow mealworms prefer dark, damp places in a granary or a feed bin. Because of their relatively large size, they are easily visible and often appear to be more numerous than they actually are. Their presence indicates poor storage conditions.
Development
The adult lives for several months. Under harsh conditions, the larvae may take one to two years to change into pupae.
Yellow mealworm image
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