Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Larval Dispersal of Spodoptera frugiperda Strains on Bt Cotton: A Model for Understanding Resistance Evolution and Consequences for its Management

Full text
Author(s):
Malaquias, Jose B. [1] ; Godoy, Wesley A. C. [1] ; Garcia, Adriano G. [1] ; Ramalho, Francisco de S. [2] ; Omoto, Celso [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Dept Entomol & Acarol, Ave Padua Dias 11, BR-13418900 Sao Paulo - Brazil
[2] Embrapa Algodao, Oswaldo Cruz, 1-143, BR-58428095 Campina Grande, PB - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 7, NOV 23 2017.
Web of Science Citations: 5
Abstract

High dispersal of Lepidoptera larvae between non-Bt and Bt cotton plants can favour the evolution of insect resistance; however, information on host acceptance of neonates in tropical transgenic crops is scarce. Therefore, the purposes of this study were as follows: (i) to investigate the feeding behaviour of susceptible and Cry1F-resistant strains of Spodoptera frugiperda (J.E. Smith) on Bt and non-Bt cotton (Gossypium hirsutum L.) varieties and (ii) to understand the possible effects of cotton field contamination on the dispersal and infestation capacity of S. frugiperda larvae by using an individual-based model. The main results of this paper are as follows: (1) the highest post-feeding larval dispersal of the Cry1F-resistant strain occurred at an exposure time of 18-24 h; (2) via video tracking assays, we found that the least distance moved was by larvae resistant to Cry1F on non-Bt cotton; and (3) the model indicated differences in mobility capacity between Bt and non-Bt cotton. We conclude that resistant neonates exhibit sedentary behaviour. Our report represents the first findings concerning the fitness cost of larval behaviour traits of S. frugiperda associated with Cry1F resistance in Brazilian populations. (AU)

FAPESP's process: 14/16609-7 - A multi - and interdisciplinary approach to understand spatio-temporal patterns of insect pests and design landscapes for sustainable pest management in tropical agricultural systems
Grantee:Wesley Augusto Conde Godoy
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/20380-8 - Ecological modelling of the larval dispersion of Spodoptera frugiperda (Lepidoptera: Noctuidae) on Bt cotton: implications for evolution and resistance management
Grantee:José Bruno Malaquias
Support Opportunities: Scholarships in Brazil - Doctorate