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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"corn earworm"”.
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Esterase Polymorphism in the Corn Earworm, Heliothis Zea (Boddie)
Made available in DSpace on 2014-12-11T18:05:46Z (GMT). No. of bitstreams: 1 7414616.pdf: 2802519 bytes, checksum: 662168788b328ac01435ce94ebe79239 (MD5) Previous issue date: 1974
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Behavioral and Physiological Aspects of Self-Selection by the Corn Earworm, Heliothis Zea
Larvae of the corn earworm, Heliothis zea (Boddie) (Lepidoptera: Noctuidae), prefer to feed on corn silks as early instars but change their feeding preference to corn kernels as they mature. Within the corn kernel, final instar larvae prefer to feed on germ but will always eat some of the …
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Dietary Self-Selection by the Corn Earworm, Heliothis Zea: Testing the Malaise Hypothesis
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988.
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Insect pest management in hemp in Virginia
… Multiple insect pests were present, including corn earworm (Helicoverpa zea [Boddie]) (Lepidoptera: Noctuidae), brown marmorated stink bug (Halyomorpha halys [Stål]) (Hemiptera: Pentatomidae), and cannabis aphid (Phorodon cannabis) (Hemiptera: Aphididae). In 2019, indoor production surveys …
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The behavioral, ecological, and chemical association of Orius insidiosus (Say) with corn silks
… relationship between Orius insidiosus (Say) and corn silk was investigated and an attempt was made to determine the possibility of using O. insidiosus as an augmentative biological control agent against the European corn borer, Ostrinia nubilalis (Hubner) and corn earworm, Heliothis zea (Boddie) …
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Components of seasonal soybean infestation by Heliothis zea in eastern Virginia, with emphasis on multivariate analysis of field susceptibility
… Six instars occur. The larval population in corn is the reservoir for the generation in soybeans. An estimator, based on the reservoir population, permitted calculation of the larval density in soybeans. An index, based on blacklight trap and emergence data, permitted precise timing ot peak …
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Biological control agents of soybean insect pests in the Tidewater area of Virginia
… effective biological controls were found for the corn earworm, <u>Heliothis zea</u> (Boddie). The only significant control agent, fungal disease, acted too slowly to prevent economic damage by this insect.
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Investigation of Biotic and Abiotic Factors Affecting Double-Cropped Corn (Zea mays L.) Production in Virginia
Double-cropping of corn (Zea mays L.) for grain following the harvest of a small grain crop has been under evaluation in Virginia as an alternative cropping strategy (Brann and Pitman, 1997). To assess the potential constraints on late planted corn imposed by insects and diseases, double-cropped …
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The Role of Host, Environment, and Fungicide Use Patterns in Algorithms for Improving Control of Sclerotinia Blight of Peanut
… architecture were compared to defoliation by corn earworm and leaf spot for suppression of Sclerotinia blight. Chlorimuron (8.8 g a.i./ha) and withholding fungicide for leaf spot control demonstrated the most significant disease suppression and yield improvement. Results show the importance of …
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Improving Integrated Pest Management in Sweet Corn System
Corn earworm (CEW), Helicoverpa zea (Boddie), (Lepidoptera: Noctuidae) is a common insect pest of sweet corn in the United States. The larvae cause chewing damage on corn ears rendering them unmarketable. Traditionally, growers have controlled CEW in sweet corn using multiple applications of …
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Developing an integrated pest management program for edamame in Virginia
… to other treatments. Lastly in 2020-2021, corn earworm (Helicoverpa zea [Boddie], Lepidoptera: Noctuidae), an important soybean pest and most likely a major pest of edamame, was tested for pyrethroid susceptibility and resistance across the state using a bean-dip bioassay. Pyrethroid …
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Farming in the city: how the urban environment affects vegetable crop production, soil heavy metal contamination and nutrient dynamics, produce nutritive quality, and insect dynamics in urban gardens
… The common garden pest Helicopvera zea (corn earworm) had greater captures of the adult insect in rural gardens while aphid infestations were greater in urban gardens. Micrometeorological conditions affected plant growth, soil nutrients and microbial, and fruit quality dynamics along a …
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Toxicity of mycotoxins to insects and underlying molecular and biochemical mechanisms
… study, three insects, including Helicoverpa zea (corn earworm), Amyelois transitella (navel orangeworm) and Apis mellifera (honey bee) varying in their exposure to mycotoxins were selected to study toxicity of mycotoxins to insects and to elucidate their underlying mechanisms of toxicity. To …