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Student 10-Minute Paper

Physiology, Biochemistry, and Toxicology

Student Competition

Student

Grad Competition PBT: Toxicology

Sublethal effect of azadirachtin on growth and development of fall armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Monday, November 6, 2023
8:48 AM – 9:00 AM ET
Location: Gaylord National Resort & Convention Center, Azalea 2
In-Person Student Competition
Neem (Azadirachta indica A. Juss) is a perennial tree belonging to the family Meliaceae that produce azadirachtin in seeds. Azadirachtin is a plant based biopesticide and it has insecticidal properties to control many pests. Azadirachtin is a tetranortriterpenoid secondary metabolite compound, the chemical structure of azadirachtin is complex, and it has many targets in the insect body. In addition, it has a unique way to cause mortality and decreases development of resistance to azadirachtin in insects. Despite its promise, its exact mode of action remains unknown. Presently, it is used by many countries to protect corn from fall armyworm. The fall armyworm is a voracious pest of corn and other field crops and causes severe damage in the Americas, Africa, Asia, and Oceania and other countries. We found that the sublethal effect of azadirachtin in neonates affects not only the molting but also affects food consumption efficiency, growth and development, pupation, egg laying capacity, egg hatching and other physiological changes in insects. Therefore, these results will provide valuable information to control fall armyworm on different stages of life cycle (egg, larvae, pupa, and adult) and it is a sustainable approach to manage the invasive fall armyworm.