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Egg parasitoids of cotton bollworm, Helicoverpa armigera (Hubner) in selected cotton growing areas



Egg parasitoids of cotton bollworm, Helicoverpa armigera (Hubner) in selected cotton growing areas



Philippine Journal of Science 124(3): 267-73



A study was conducted in selected cotton-growing areas of Batac and Bacarra, Ilocos Norte and at the Cotton Research and Development Institute Experimental Farm in San Juan, Ilocos Sur, Philippines, from November 1991 to May 1993. Its aim was to survey the naturally occurring egg parasitoids of Helicoverpa armigera, to determine the level of parasitism in the field and to compare parasitism between sprayed and unsprayed plots.

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