Soybean looper

The soybean looper (Chrysodeixis includens) is a significant moth species belonging to the Noctuidae family of the order Lepidoptera. It is recognized as a major economic pest, particularly in soybean production, due to its voracious feeding habits and ability to develop resistance to certain chemical controls.

This insect is highly polyphagous, meaning it feeds on a wide array of host plants. While soybean is its primary agricultural target, it is frequently found damaging other economically important crops such as cotton, corn, tomatoes, sunflowers, and a variety of legumes and leafy vegetables.

The biology of the soybean looper involves a complex lifecycle of four stages: egg, larva, pupa, and adult. The larvae go through several instars, with each stage requiring increasing amounts of plant tissue. Environmental factors like temperature and humidity play a critical role in determining the number of generations per year.

Damage caused by the larvae is characterized by intensive defoliation. Early-stage larvae often skeletonize the underside of leaves, while larger larvae consume entire leaf surfaces, leaving only the veins. This severe defoliation significantly reduces the plant's photosynthetic capacity, ultimately leading to yield loss.

• Implementation of Integrated Pest Management (IPM) practices.
• Regular field scouting to monitor larval populations and egg density.
• Use of economic thresholds to determine the need for insecticide application.
• Application of selective insecticides that spare beneficial natural enemies.
• Rotation of crops and destruction of volunteer host plants and weeds.