Effect of cotton leafworm infestation on reproductive structures of cotton plants

Authors

  • Marcos Doniseti Michelotto Agência Paulista de Tecnologia dos Agronegócios, Polo Regional Centro Norte
  • Jacob Crosariol Netto Universidade Estadual Paulista
  • José Fernando Jurca Grigolli Universidade Estadual Paulista
  • Antonio Carlos Busoli Universidade Estadual Paulista
  • Willians Cesar Carrega FCAV/Unesp, Campus de Jaboticabal, SP
  • Everton Luis Finoto Agência Paulista de Tecnologia dos Agronegócios, Polo Regional Centro Norte
  • Juliana Altafin Galli Agência Paulista de Tecnologia dos Agronegócios, Polo Regional Centro Norte

DOI:

https://doi.org/10.14393/BJ-v31n5a2015-26433

Abstract

The cotton leafworm, Alabama argillacea (Hübner, 1818) (Lepidoptera: Noctuidae) is a major defoliating pest that reduces yield and quality of the crop. The purpose of this study was to evaluate the effect of different levels of defoliation caused by different larval densities of A. argillacea on four cotton cultivars in three different plant ages. The experiment was conducted at an experimental station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Polo Centro Norte, in Pindorama, SP, Brazil. The experiment was arranged in a factorial randomized block design with 4 replicates: four cultivars (DeltaOPAL, IAC-25, Fibermax 996 and Fibermax 993) x four larval densities (0, 2, 4, and 6 larvae per plant) x three infestation times (30, 60 and 90 days after plant emergence). Fortnightly evaluations carried out based on the production of squares, flowers, fruits and bolls per plant. It was found that the higher infestation level of A. argillacea, the lower was the production of buds per plant and consequently the production of fruits and bolls of the four varieties. Early infestation (30 and 60 DAE) reduced the production of reproductive structures per plant in cultivars more than late infestation (90 DAE).

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Author Biography

Willians Cesar Carrega, FCAV/Unesp, Campus de Jaboticabal, SP

Departamento de Produção Vegetal, Doutorando em Agronomia (Produção Vegetal)

Published

2015-09-10

How to Cite

MICHELOTTO, M.D., CROSARIOL NETTO, J., GRIGOLLI, J.F.J., BUSOLI, A.C., CARREGA, W.C., FINOTO, E.L. and GALLI, J.A., 2015. Effect of cotton leafworm infestation on reproductive structures of cotton plants . Bioscience Journal [online], vol. 31, no. 5, pp. 1388–1395. [Accessed6 December 2022]. DOI 10.14393/BJ-v31n5a2015-26433. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/26433.

Issue

Section

Agricultural Sciences