Comparative hemocyte study of three geographically isolated strains of diamondback moth, Plutella xylostella L. (Lepidoptera : Yponomeutidae)

Date

7-1992

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Rita P. Laude

Abstract

Differential hemocyte count of the legs of newly-emerged adult Plutella xylostella of France, Batangas and Ifugao strains were determined using squash technique with Wright's stain. The hemocytes observed were identified using Gupta's key for identification. Prohemocyte was the only hemocyte present in the France strain. Newly-emerged adult from Batangas and Ifugao revealed the occurrence of two types of hemocytes : prohemocytes and granulocytes. The presence of granulocytes provide the insect level of resistance to insecticides. Granulocytes is involved in phagocytosis and encapsulation. There was a significant difference in the total hemocyte count among three strains. This also explain the level of tolerance of the insect to insecticides. The size of the hemocytes was found to have no significant difference among the three strains.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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