Thoracic Leg Coloration of Soybean Looper and Cabbage Looper Larvae (Lepidoptera: Noctuidae): an Unreliable Field Identification Character for Species Separation

The subfamily Plusiinae of the moth family Noctuidae is made up 400 species worldwide. Two species of the subfamily, the soybean looper, Chrysodeixis includens (Walker), and the cabbage looper, Trichoplusia ni (Hübner) (Lepidoptera: Noctuidae), are important defoliating insect pests of various field crops and have been the subject of previous Plusiinae surveys in the Southern U.S. Soybean fields were sampled in the Mississippi Delta from 2010 to 2012 to determine the temporal occurrence of various Plusiinae species on soybean. As in previous surveys, C. includens was the most common Plusiinae species in soybean during the 3-yr survey, especially in late season collections (July–September). Rachiplusia ou (Guenée) (Lepidoptera: Noctuidae) was the predominant species observed in early season collections (May–early July). Populations of R. ou during the first sample dates during 2010 were much higher than those observed during the other years of the survey. Only three collected larvae successfully developed into T. ni adults, one each collected during May, June, and July. Although R. ou was not commonly reported in previous studies on soybean, it occurred in low numbers during June and July during the 3-yr study. The temporal occurrence and species composition followed a predictable pattern in all 3 yr of the study.

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Temporal Occurrence of Plusiinae on Soybean in the Mississippi River Delta

Allen

Little

Perera

2021

Journal of Economic Entomology

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Thoracic Leg Coloration of Soybean Looper and Cabbage Looper Larvae (Lepidoptera: Noctuidae): an Unreliable Field Identification Character for Species Separation

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Temporal Occurrence of Plusiinae on Soybean in the Mississippi River Delta

Temporal Occurrence of Plusiinae on Soybean in the Mississippi River Delta

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