Occurrence of green semilooper Chrysodeixis acuta Walker (Lepidoptera: Noctuidae) in onion (Allium cepa L.) (Amaryllidaceae)
Abstract
The occurrence of green semilooper, Chrysodeixis acuta Walker (Lepidoptera: Noctuidae) in onion was recorded for the first time from the Pune district of Maharashtra State of India. Weekly observations of the pest and its damage were made to assess the intensity of the caterpillar population and its impact to the onion crop. Early instar larvae of C. acuta feed by scraping the leaves, whereas the later instars make circular cuts in the leaves. The presence of large cuts and defoliation is a sign of infestation in onion. Since C. acuta is polyphagous, it may spread to onion crops in the region and cause significant damage to the crop. Therefore, further research is required to monitor its spread and ability to become a pest in onion.
Sumario
Se registró la aparición del falso medidor verde, Chrysodeixis acuta Walker (Lepidoptera: Noctuidae) en cebolla por primera vez en el distrito de Pune del estado de Maharashtra en la India. Con el fin de evaluar la intensidad de la población de orugas y su impacto al cultivo de cebolla, se evaluó el efecto de la oruga por medio de observaciones semanales de la plaga y su daño. Los primeros estadios de las larvas de C. acuta raspan las hojas al principio, y los estadios posteriores hacen cortes circulares en las hojas. La presencia de grandes cortes y defoliación es un señal de infestación en la cebolla. Como C. acuta es polífago, puede extenderse a la cebolla como un hospedero favorable y puede causar un daño significativo al cultivo. Por lo tanto, se requiere más investigación para evaluar la sucesión y la capacidad de convertirse en una plaga de cebolla.
Key Words: tomato semilooper; host expansion; onion pests; Chrysodeixis sp.
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