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Foraging and growth responses of cotton armyworm S podoptera litura to the biophysical characteristics of five cotton varieties
Author(s) -
Amin Md Ruhul,
Roy Miltan Chandra,
Rahman Md Mahbubar,
Miah Md Giashuddin,
Kwon Yong Jung,
Suh Sang Jae
Publication year - 2015
Publication title -
entomological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 20
eISSN - 1748-5967
pISSN - 1738-2297
DOI - 10.1111/1748-5967.12125
Subject(s) - spodoptera litura , biology , trichome , instar , bt cotton , larva , noctuidae , dry weight , lepidoptera genitalia , pupa , botany , horticulture , agronomy
This study investigated the morphological and biochemical characteristics of the CB 1, CB 3, CB 5, CB 8 and CB 12 cotton varieties and evaluated their effects on third instar larval movement, and body weight of the cotton armyworm S podoptera litura at different developmental stages. The cotton varieties differed in their plant architecture, branching, stem color and hairiness, leaf color and hairiness, leaf trichome density, flower color, numbers of leaves and bolls per plant, concentrations of protein and starch, and boll length, width and weight. The CB 1 and CB 3 varieties possessed significantly higher trichome densities, while CB 8 produced larger and heavier bolls. Boll bearing was found to be highest in CB 1 and lowest in CB 8. Biochemical analyses indicated the highest percentage of protein in CB 5, and of starch in CB 8; concentrations of both were lowest in CB 12. Cotton varieties did not affect larval foraging, but their abundance on leaflet, mature and square differed significantly. Analysis of the growth response parameters of S . litura as a result of feeding on the tested varieties revealed that larval instars, pupae and adult moths attained the highest body weight on CB 8, followed by CB 5, and the lowest weight on CB 12. Collectively, the results of this study show that the CB 5 and CB 8 varieties are favorable host‐plants for cotton armyworms; therefore, these varieties are the least suitable for cultivation.