Soil larvae
Namibian crop pests  #  88

(Unknown) Order:  Family: 

There may be two species or two different stages involved here, note the difference between the upper row and lower row of photos. (A.L.)


1. Larvae with damaged bambaranuts

2. same as photo 1

3. Second sample

4. Closeup of the 30 mm long larvae

 

Common names: 

The name Ombava is often used about a range of pests attacking at or below ground level. It usually refers to No 68 Ombava, which is a moth and to false wireworms (no number or page yet). Some farmers indicate that Ombava can also damage groundnut and bambaranut. 

Pest status:

Unknown.

Description:

The pest eats holes in the underground pods of bambaranut. The symptoms differ from termite damage as the pods are just emptied of contents, while termite-damaged pods are usually filled with soil.

A series of photos were taken of the attack and two are shown above (photo 1 & 2) They indicate a long slim larvae, whitish or grey and clearly segmented with a pale brown head. The larve looks similar to false wireworm. No specimens were taken.

A second sample was taken (photos 3 & 4). The larvae were up to 30 mm long and thicker, brown with distinct legs. The tail end has a strange, charateristic look as if it were cut off at a slanting angle. Two specimens were preserved.

The second series of photos or samples are very similar to pest No. 11 Underground beetle, a larvae that can reach a size of 60 mm. This larvae is well known by the women who weed the Pearl millet and Sorghum fields. They report that it damages the roots of these crops. 

Control:

No control is yet recommended

Other notes: 

 



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