Infestations of Soybeans in Southeast Missouri by the Corn Earworm, Heliothis Zea (Boddie) (Lepidoptera
Author: Marion E. Freeman
Publisher:
Published: 1973
Total Pages: 124
ISBN-13:
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Author: Marion E. Freeman
Publisher:
Published: 1973
Total Pages: 124
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DOWNLOAD EBOOKAuthor: Craig Steven Eckel
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Published: 1991
Total Pages: 262
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DOWNLOAD EBOOKAuthor:
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Published: 1978
Total Pages: 252
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DOWNLOAD EBOOKAuthor: Raden M. Saleh
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Published: 1985
Total Pages: 112
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DOWNLOAD EBOOKAuthor: Imam Prasadja
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Published: 1993
Total Pages: 296
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DOWNLOAD EBOOKAuthor: Niranjan Panda
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Published: 1969
Total Pages: 274
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DOWNLOAD EBOOKAuthor: Richard W. Straub
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Published: 1972
Total Pages: 444
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DOWNLOAD EBOOKAuthor: Raden M. Saleh
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Published: 1988
Total Pages: 254
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DOWNLOAD EBOOKAuthor: Baldev Singh Mangat
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Published: 1965
Total Pages: 196
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DOWNLOAD EBOOKAuthor: Brian Patrick Adams
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Published: 2015
Total Pages: 111
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DOWNLOAD EBOOKInteractions between corn earworm, Helicoverpa zea (Boddie), and soybean, Glycine max L. (Merrill), were investigated in the Mid-South to evaluate thresholds and damage levels. Field studies were conducted in both indeterminate and determinate modern cultivars to evaluate damage, critical injury levels, and soybean response to simulated corn earworm injury. Field studies were also conducted to evaluate the response of indeterminate cultivars to infestations of corn earworm. Field studies were also conducted to investigate the relationship between pyrethroid insecticide application and corn earworm oviposition in soybean. Results of field studies involving simulated corn earworm damage indicated the need for a dynamic threshold that becomes more conservative as soybean phenology progressed through the reproductive growth stages. This suggested that soybean was more tolerant to fruit loss during the earlier reproductive stages and was able to compensate for fruit loss better during this time than at later growth stages. Results of field studies involving infestations of corn earworm indicated that current thresholds are likely too liberal. This resulted in economic injury level tables being constructed based upon a range of crop values and control costs, however, a general action threshold was also recommended for indeterminate soybean in the Mid-South. Field study results investigating the relationship of pyrethroid application and corn earworm oviposition indicated that even in the presence of an insecticide, corn earworm prefers to oviposit in the upper portion of the canopy, as well as on the leaves as opposed to all other plant parts, consistent with all previous literature.