Longheaded flour beetle
Latheticus oryzae Waterhouse
Primary pest (mills); grain feeder
- Adults are yellowish to brownish beetles that are slender and flattened, reaching a length of 3 mm.
- Adults have a comparatively large head with short antennae with a five segmented club.
- Larvae are pale yellow to cream in color with a dark head capsule and dark urogomphi.
- Pasta, dried cassava, oatmeal, provender, tea, sorghum, maize, cereal grains
Signs of infestation
- Disagreeable odour in the commodity is an indication of the presence of these beetles.
- Presence of large numbers is indicative of old stores of poor quality.
- Damage is not distinctive.
- Both adults and larvae feed on the commodity.
How to control
- Is distributed worldwide
- Is not known to be widely established in Canada but has been reported from ports in New Brunswick and Quebec and occurs infrequently on the Prairies
- Is not cold tolerant and thrives only in hot damp conditions
- Is considered a minor pest of stored grain
- Can be destructive in mills, granaries and holds of ships
- This beetle requires a very high minimum temperature for development to occur (25oC).
- Females lay eggs at random throughout the food source.
- Larvae actively move through the food.
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