Effect of starvation on egg load, fecundity and adult longevity of Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae), reared on rice moth eggs, its factitious host

Date

7-2011

Degree

Bachelor of Science in Agriculture

Major Course

Major in Entomology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Ceballo, Flor A

Abstract

The sexuality as well as the effect of starvation on the reproductive maturity, longevity and lifetime productivity of Trichogramma chilonis was studied using populations from the rearing laboratories of Biological Control Laboratory of the Crop Protection Cluster-National Crop Protection Center. The mode of reproduction of the laboratory population of T. chilonis is arrhenotoky. The pattern of egg maturation and deposition in T. chilonis does not fit the strict dichotomy (synovigeny versus pro-ovigeny) but has an ovigeny index of 0.44-0.6. Starved wasps lived for an average of 2.7 ± 0.33 days and wasps with food provision lived longer for 5 to 10 days. Egg maturation (27.1 ± 1.48 mature eggs per day) was high when provided with food than when starved (15.2 ± 6.82 mature eggs per day). Lifetime fecundity was also significantly higher when adult wasps were offered with honey with an average potential fecundity of 13.9 ± 1.05 pupae and average realized fecundity of 12.7 ± 1.09 offspring. Starved wasps the average lifetime fecundity was 4.9 ± 1.8 offspring. Potential fecundity was higher (superparasitism incidence fully accounted) than the realized fecundity. T. chilonis adults with access to food or starved, the sex ratio of the emerging progeny was male biased.

Language

English

Location

UPLB Main Library Special Collections Section

Call Number

Thesis

Document Type

Thesis

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