Evaluation of Efficiency  the Parasitoid Trichogramma evanescens Westwood and  Parasitoid Bracon hebetor Say for Controlling Immature Stages for Potato Tuber Moth .

	Evaluation of Efficiency the Parasitoid Trichogramma evanescens Westwood and Parasitoid Bracon hebetor Say for Controlling Immature Stages for Potato Tuber Moth .
journal of kerbala university
Article 1, Volume 13, Issue 4, 2017, Pages 204-208 PDF (0 K)
Abstract
This study was conducted to evaluated the efficiency of larva parasitoid B. hebetor in second and fourth stage of larva and the efficiency of eggs parasitoid T. evanescens in lab. Condition in immature stage for Potato Tuber Moth (PTM) Phthorimaea operculella (Zeller)، at different periods of treatment ranged (24, 48, 72 , 120) hours . The study results demonstrates high effectiveness for both parasitoids in rates of the mortality and the decrease of moth population with increasing time of treatment in all periods for larval parasitoid and eggs parasitoid causing mortality which increased with progress the period of treatment ، it were the rates mortality of larval that was 80.33% , 92.40 % for second and fourth stage respectively at period of treatment 120 hours ، and also decreasing the rates of emergence hosts to 0.00 % of the same period. Then the numbers of pupae and adults parasitoid were increased ، which developed on this larva ، and increase the numbers of eggs which non- hatching by effects of parasitoid T. evanescens ، and the number of pupa and the percentage of parasitoids emerging from parasitized eggs were increased. It was the highest rates of eggs mortality 68.52% , 62.30 % at the age (1-2),(3-4) days respectively at the period treatment 120 hours ، and also decreased the emergence host to 18.12% at the same period . The results demonstrates high efficiency for the parasitoid B. hebetor in mortality rates and decreased moth population ، and reached the rate host adults to 0.00% at the period of treatment 120 hours in comparing with the rate 18.33% for T. evanescens at the same period .

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