STEM BORERS
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2. Biological Control<br />
1) Releasing trichogrammatids<br />
(1) To control the corn borers: releasing wasps<br />
2-3 times at the initial ovipositing period, the<br />
beginning peak and peak of ovipositing respectively.<br />
10000-20000 wasps are released in 3-5 different plots<br />
each time in 667m2. This number can be increased<br />
during the egg peak. The wasp cards are about 1m<br />
from the ground. Keep the wasp cards from rain<br />
and sunlight.
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