Effects of Egg Parasitoid Chelonus phthorimaea Gahanon Potato Tuber Moth Phthorimaea operculella Zeller
DOI:
https://doi.org/10.55276/ljs.v19iA.147Keywords:
Potato tuber moth (PTM), P. operculella, egg parasitoid, C. phthorimaeaAbstract
This study revealed the significance of laboratory rearing of potato tuber moth (PTM) Phthorimaea operculella egg parasitoid Chelonus phthorimaea. The initial rearing counts of 50 parasitoid pupae imported from Tunisia were exposed to 270 potato tuber moth P. operculella eggs. During the period of this research the outcome of 9106 PTM parasitoids resulted in 15394 PTM parasitized eggs out of 34705 reared in 47 cages with an infestation rate of 21-25%. The parasitoid showed an infestation rate of 17 PTM eggs/female, with an increase of 22% in pupal parasitism. These findings were in accordance with previous reported studies. Because of high parasitoid population production, rearing of PTM was limited to 50%. The power of the ordinary least squares (OLS) model was determined for the rate of parasitoid and the coefficient of determination R² = 71.31 %. The results clearly indicated the powerful effect of the oophagous, C. phthorimaea of potato tuber moth, P. operculella under laboratory conditions.
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