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Selective feeding on green bean Phaseolus vulgaris by Heliothis zea
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http://hdl.handle.net/2142/22266
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| 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 |
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Dissertations and Theses - Entomology
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Graduate Theses and Dissertations at Illinois
Graduate Theses and Dissertations at Illinois
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