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Description
Title: | Selective feeding on green bean Phaseolus vulgaris by Heliothis zea |
Author(s): | Naeem, Mohammad |
Doctoral Committee Chair(s): | Waldbauer, G.P. |
Department / Program: | Entomology |
Discipline: | Entomology |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | Ph.D. |
Genre: | Dissertation |
Subject(s): | Biology, Entomology
Agriculture, Plant Pathology |
Abstract: | First and early second instar Heliothis zea larvae, feeding on the green bean Phaseolus vulgaris, fed preferentially on the leaf. The leaf feeding tendency decreased after about 12 h in the second instar. Third, fourth and fifth instar larvae fed preferentially on bean pod. Leaf-fed last instar larvae had lowered growth rate and weight gain, due largely to a lower rate of feeding rather than an inability to utilize leaves efficiently for growth. Overall utilization efficiencies did not differ between last instar larvae fed seeds or a mix of seeds and pulp. Larvae fed either seeds or a mix ate significantly less and completed the instar in a significantly shorter time than larvae fed only on pulp. Seed-fed larvae, however, ate significantly less and had a higher ECD than larvae that either fed on the mix or pulp alone. Pulp contained about 93-95% water as compared to the 84-86% water content of seeds. Pulp-feeding larvae increased their fresh weight RCR to about 2.9 times that of seed-fed larvae and about 1.8 times that of mix-fed larvae by increasing the time spent feeding and decreasing the interfeed gaps. (Abstract shortened with permission of author.) |
Issue Date: | 1990 |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/22266 |
Rights Information: | Copyright 1990 Naeem, Mohammad |
Date Available in IDEALS: | 2011-05-07 |
Identifier in Online Catalog: | AAI9114356 |
OCLC Identifier: | (UMI)AAI9114356 |
This item appears in the following Collection(s)
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Dissertations and Theses - Entomology
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois