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Agriculture for Secondary Schools

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Figure 7.3: Aphid infestation on cowpea leaves and stem

Cowpea pod borers: These are caterpillars that bore into flower buds and pods.
Damaged pods show holes and may rot. Pod borers can be controlled by hand-
picking caterpillars, using plant extracts such as neem, or spraying approved
insecticides when needed. Figure 7.4 shows cowpea pod borers and the damage
they cause.

Figure 7.4: Cowpea pod borers and the damage they cause

Bruchids: Bruchids are the most widespread pulse storage insects attacking
stored cowpea grains. They lay eggs on dry seeds. The larvae feed inside the seed,
causing holes. This reduces seed quality. Bruchids are managed by drying seeds
well before storage and packing them in airtight containers or hermetic bags and
applying the recommended insecticides. Figure 7.5 shows cowpea bruchids and
the damage they cause.

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