Biology of Brinjal Shoot and Fruit Borer (Leucinodes orbonalis Guenee) at Room Temperature
Arun Kumar *
Department of Entomology, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh -208002, India.
R. S. Singh
Department of Entomology, B.N.P.G. College, Rath, Hamirpur, Uttar Pradesh, India.
S. K. Biswas
Department of Plant Pathology, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh -208002, India.
C. L. Maurya
Department of Seed Science and Technology, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh -208002, India.
Sanjeev Kumar
Department of Agronomy, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh -208002, India.
Mahak Singh
Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh -208002, India.
*Author to whom correspondence should be addressed.
Abstract
The present study investigates the biology of the brinjal shoot and fruit borer (Leucinodes orbonalis Gue.) under normal room temperature conditions during 2022 and 2023. Key developmental parameters, including egg hatching, larval and pupal duration, fecundity and total life span, were recorded. Egg hatching percentage remained consistent at 54%, with an incubation period of 3-5 days (3.6 ± 0.40 days). The total larval period was 12.4 ± 0.60 days in 2022 and 13.4 ± 0.68 days in 2023, while the pupal period remained stable at 9 ± 0.45 days. The total developmental period varied from 23-30 days (26.4 ± 1.21 days) in 2022 to 22-26 days (23.8 ± 0.66 days) in 2023. Female fecundity ranged from 148-257 eggs (193.6 ± 23.82) in 2022 and 139-267 eggs (202 ± 25.52) in 2023. The sex ratio (Male: Female) varied slightly, being 0.83:1 in 2022 and 0.67:1 in 2023. The total lifespan was longer for females (31 days in 2022, 28.5 days in 2023) than males (29.5 days in 2022, 27 days in 2023).
Keywords: Brinjal shoot, fruit borer, biology, room temperature, developmental period, sex ratio