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Effects of temperature on the feeding behavior of Alabama argillacea (Hübner) (Lepidoptera: Noctuidae) on Bt and non-Bt cotton plants

Overview of attention for article published in Anais da Academia Brasileira de Ciências, December 2017
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Title
Effects of temperature on the feeding behavior of Alabama argillacea (Hübner) (Lepidoptera: Noctuidae) on Bt and non-Bt cotton plants
Published in
Anais da Academia Brasileira de Ciências, December 2017
DOI 10.1590/0001-3765201720150525
Pubmed ID
Authors

Francisco S Ramalho, Jéssica K S Pachú, Aline C S Lira, José B Malaquias, Bárbara D S Brito, José C Zanuncio, Francisco S Fernandes

Abstract

The host acceptance behavior and environmental factors as temperature affect the feeding behavior of Lepidoptera pests. Thus, they must be considered in studies about the risk potential of resistance evolution. The current study sets the differences in the feeding behavior of neonate Alabama argillacea (Hübner) (Lepidoptera: Noctuidae) larvae exposed to Bt and non-Bt cotton plants, under different temperatures and time gap after hatching. Two cotton cultivars were used: the Bt (DP 404 BG - bollgard) and the non-transformed isoline, DP 4049. We found that the feeding behavior of neonate A. argillacea is significantly different between Bt and non-Bt cotton. Based on the number of larvae with vegetal tissue in their gut found on the plant and in the organza as well as on the amount of vegetal tissue ingested by the larvae. A. argillacea shows feeding preference for non-Bt cotton plants, in comparison to that on the Bt. However, factors such as temperature and exposure time may affect detection capacity and plant abandonment by the larvae and it results in lower ingestion of vegetal tissue. Such results are relevant to handle the resistance of Bt cotton cultivars to A. argillacea and they also enable determining how the cotton seeds mix will be a feasible handling option to hold back resistance evolution in A. argillacea populations on Bt cotton, when it is compared to other refuge strategies. The results can also be useful to determine which refuge distribution of plants is more effective for handling Bt cotton resistance to A. argillacea.

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Geographical breakdown

Country Count As %
Unknown 13 100%

Demographic breakdown

Readers by professional status Count As %
Unspecified 2 15%
Student > Bachelor 2 15%
Professor 1 8%
Researcher 1 8%
Student > Doctoral Student 1 8%
Other 0 0%
Unknown 6 46%
Readers by discipline Count As %
Agricultural and Biological Sciences 4 31%
Unspecified 2 15%
Medicine and Dentistry 1 8%
Engineering 1 8%
Unknown 5 38%