Author: Colothdian Deavonder Tate
Publisher:
ISBN:
Category :
Languages : en
Pages : 156
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Book Description
Pennsylvania smartweed, velvetleaf, and giant foxtail were a few of the plants that were highly attractive to 0. nubilalis neonates in the 1997 trials. Again corn was one of the least preferred plants in 1997. Velvetleaf and giant foxtail had the highest and lowest concentration of nitrogen respectively. Neonate acceptance of giant foxtail and velvetleaf tended to decrease as the plants matured. These results have implications for 0. nubilalis evolution and for 0. nubilalis resistance-management refuge plants.
Author: Janine Razze
Publisher:
ISBN:
Category : Bacillus thuringiensis
Languages : en
Pages :
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Book Description
European corn borer (ECB), Ostrinia nubilalis (Hübner), is an economically important insect pest of corn in the US and Canada. The development of genetically modified corn expressing genes derived from Bacillus thuringiensis (Bt) that encodes insecticidal crystalline (Cry) proteins has proven to be effective in controlling this insect. The purpose of this study was to assess dispersal and feeding behavior of neonate ECB on Bt corn. I examined differences in neonate ECB dispersal behavior for the first four hours following eclosion in the field among stacked pyramid (DAS 59122-7 x TC1507 x MON810) Bt corn, non-Bt near isoline, and non-Bt sweet corn; and in the laboratory among Bt corn hybrids TC1507, MON810, a pyramid combining TC1507 and MON810, and non-Bt near isoline corn. I also examined differences in feeding behavior between MON810 Bt corn and non-Bt near isoline corn for four intervals over a 48-hour period. In field experiments, I found that dispersal was significantly higher on non-Bt near isoline and Bt corn when compared to sweet corn. In laboratory experiments, dispersal was significantly higher on MON810 and stacked pyramid Bt corn than on non-Bt near isoline corn. Finally, feeding experiments suggested that there was a significant difference in feeding behavior between MON810 Bt corn and non-Bt near isoline corn. The findings from the feeding experiment also suggested that more than 50% of the larvae abandoned the plant before there was evidence of feeding for both Bt and non-Bt corn. Results indicated that a mixed refuge method could prove to be an effective solution for managing ECB resistance on Bt corn. However, additional research needs to be conducted on ECB larval movement between Bt and non-Bt corn to fully assess the efficacy of the mixed refuge strategy.
Author: Sue Lynn Sullivan
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 164
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Book Description
Author: Benjamin E. Hodgson
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 72
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Book Description
Author: Stuart Cunningham Vinal
Publisher:
ISBN:
Category : European corn borer
Languages : en
Pages : 78
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Book Description
Author: F. W. Poos
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 64
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Book Description
Author: Octavio Vargas Hernandez
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 126
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Book Description
Author: Alexander Edmond Cance
Publisher:
ISBN:
Category : Ammonia as fertilizer
Languages : en
Pages : 428
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Book Description
Author: Carl John Drake
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 24
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Book Description
Author: Jessica Ann Goldstein
Publisher: ProQuest
ISBN: 9780549182382
Category : Corn
Languages : en
Pages :
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Book Description
Most Lepidoptera disperse as adults, but in some groups the larvae disperse as well. Larval dispersal takes the form of ballooning; larvae use silk to hang off of plant surfaces and some get picked up by the wind. The longer the silk length, the greater the drag and the more likely the larva is to get picked up by the wind and the farther the larva will travel. The European corn borer (ECB), Ostrinia nubilalis, has been observed ballooning and is currently the target of a large control effort using transgenic Bt corn. I examined the differences between ECB larval dispersal on Pioneer 34K78 Mon 810 event Bt corn and Pioneer 34K77 non-Bt isoline corn. I tested plant abandonment, larval dispersal in artificial plots and ECB silking behavior. My results suggest that ECB larvae that hatch on a Bt corn plant abandon that plant with a higher frequency than ECB larvae that hatch on a non Bt corn plant and that ECB larvae are capable of reaching neighboring corn plants by ballooning. This dispersal behavior may play a significant role in resistance management, particularly in the spacing of non-Bt refuges. These experiments help us to better understand ECB neonate behavior and may apply to other insects under Bt selection pressure.
