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Adult Longevity of Trichogramma Zahiri on Different Diets

Md. Nazmul Bari
Senior Scientific Officer
Entomology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Dr. Mahbuba Jahan
Professor
Entomology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Abstract/ Executive Summary:

Adult longevity of T. zahiri depends on diets and highest longevity of female was found when host food plus 25% honey solution was supplied as food. Female longevity was 4 to 10 hours longer than the male when different diets were provided.

Keywords: Adult longevity, Trichogramma, Diets

Location: BRRI, Gazipur

Start Date: 01-07-2011

End Date: 30-06-.2012

Program Area: Pest Management

Commodity: Rice

Objectives:

To know the adult male and female longevity of T. zahiri on different diets.

Methodology:

Adult longevity experiment was conducted by captivated 3 cohorts of 5 pair (male and female) adult T. zahiri in 5 different test tubes with 5 different foods including a control (water as the diet). Thus, 15 pairs of T. zahiri were reared on each diet. Honey 25%, sugar 25%, host food (RH egg), host food+honey 25%, host food +sugar 25% solutions in cotton wool wrapped with fine mesh nylon net were provided as diets. If any of the adult parasitoids adhered to the water droplet or honey/sugar solution that was discarded from the record. Survivorship of the parasitoid was recorded every six hours till all the test parasitoids died. The variables, adult male and female longevities among treatments, were compared by one way analysis of variance (ANOVA) SPSS V. 19; 2011 by Tukey´s Post-hoc Test at 0.05 level.

Source of Information: Internal review workshop paper, 2011-12

Article Link (Online Journal):

Funding Source:

1.	Budget:
2. Bangladesh Agricultural Research Council	Budget:

Total Budget (Tk.) :

Achievement/Findings:

Males of T. zahiri lived for 47.2 to 91.2 hours when different diets were provided to the parasitoids. Highest longevity (91.2 hours) was found when honey 25% solution was provided with the host food and the lowest was found in control. Longevity of the female T. zahiri ranged from 51.2 to 96.0 hours on different diets. Longevity of both sexes were highest when 25% honey solution was provided with host food and lowest in control when only water was used as diet. No significant difference was observed in male longevity when honey and sugar 25% solutions were provided separately with host food. But in case of the female, longevity was found highest on honey 25% solution than sugar 25% solution and the difference was significant.

Knowledge Management: Report/Proceedings