The Reproductive Potential of Ichneumonid Wasp, Eriborus argenteopilosus Cameron (Hymenoptera:Ichneumonidae) Reared on Second Instar Cotton Bollworm, Helicoverpa armigera Hubner (Lepidoptera:Noctuidae) Larvae
Leonardo T. Pascua1 and Miriam E. Pascua2
1Cotton Research Center, Cotton Development Administration
Batac, Ilocos Norte
2College of Agriculture and Forestry, Mariano Marcos State University,
Batac, Ilocos Norte
corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
The reproductive potential of Eriborus argenteopilosus Cameron on Helicoverpa armigera Hubner under laboratory conditions was calculated using life table analysis. Eriborus argenteopilosus had a net reproductive rate of 36.2 and completed its generation in 21.4 days. The egg and larvae developed within 10.6 days and the pupa in 8.3 days. The intrinsic rate of increase and finite rate of increase in numbers were 0.17 and 1.18 females per female per day, respectively. With the net reproductive rate, the population of the wasp can multiply as much as 3.2 times every week.
INTRODUCTION
In the Philippines, many naturally occurring parasitoids can play an important role in reducing the population of the cotton bollworm, Helicoverpa armigera (Hubner) in cotton fields (Cahatian 1990; Cacayorin et al. 1993; Pascua & Pascua 1965). They can be used to manage the pest in sustainable way. One of the potential parasitoid is the Eriborus argenteopilosus . . . .
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