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Bioecological characteristics of Chrysodeixis includens (Lepidoptera: Noctuidae) fed on different hosts

2016; Wiley; Volume: 55; Issue: 4 Linguagem: Inglês

10.1111/aen.12208

2052-1758

Karine Andrade, Adeney de Freitas Bueno, Débora Mello da Silva, Cristiane Dos Santos Stecca, Amarildo Pasini, M. C. N. de Oliveira,

Insect Resistance and Genetics

Abstract Chrysodeixis includens (Walker 1858), also known as soybean looper, is a polyphagous pest with increasing economic significance in various crops. The rate of infestation and its distribution can be influenced by feeding through direct and indirect effects on their life cycles. Thus, this study aimed to examine the biological characteristics, food preference and leaf consumption of C. includens on soybean (BRS 284), cotton (FMT 701), sunflower (BRS 323) and common morning glory leaves ( Ipomoea sp.) as possible host plants. The experiments were conducted with specimens obtained from mass rearing in the laboratory. C. includens larval and larval‐adult stages were shorter in sunflower and longer in cotton. Also, larval preference was greater for sunflower and lower for cotton leaves. Soybean leaves were consumed the least in contrast to sunflower and common morning glory leaves, which were consumed the most. These results suggest that soybean, sunflower or common morning glory leaves were favourable hosts for C. includens development, whereas cotton leaves are less nutritionally adequate for insect development. In addition, sunflower leaves reduce C. includens development time and promotes a survival rate greater than 95%, and the leaves are more attractive to larvae when compared with the other tested hosts. This indicates sunflower is the most favourable host among the tested plants for C. includens .