RAJ KUMAR, DALIP KUMAR*, BAJRANG LAL SHARMA, PAVITRA KUMARI, KANCHESH, SUMIT MEHLA AND SHUBHAM
Department of Entomology, CCS Haryana Agricultural University, Hisar-125 004 (Haryana), India
Department of Plant Pathology, CCS Haryana Agricultural University, Hisar-125 004 (Haryana), India Department of Zoology, Government College, Hisar-125 001 (Haryana), India
*(e-mail: dilipshroff@rediffmail.com)
(Received : 28 February 2024; Accepted : 30 March 2024)
SUMMARY
Present investigation was carried out in dual purpose sorghum, HC 308 during Kharif, 2021 at CCS HAU, Hisar in replicated four times at four successive date of sowing at seven days interval to study the impact of date of sowing on incidence of sorghum stem borer and shoot fly in sorghum crop. Number of eggs laid by sorghum shoot fly at 7 and 14 days after emergence (DAE) was lowest in the crop sown on 21st July (0.67 and 1.33, respectively) and was highest in the crop sown on 11th August i.e., 3.00 and 4.00, respectively. Sorghum crop sown on 21st July showed significantly lowest per cent of deadheart incidence (12.33 and 15.39%) while, crop sown on 11th August showed higher per cent of deadheart incidence i.e., 25.52% and 29.78% at 21 and 28 DAE, respectively. Deadheart per cent by sorghum stem borer was recorded lower (16.42%) in crop sown on 21st July as compare to crop sown on 11th August (27.79%) at 45 DAE. Therefore, rather than rushing to apply different insecticides, date sowing of sorghum crop should primarily be kept in mind to avoid the more of an attack from sorghum shoot fly and stem borer.
Key words:Sorghum, sowing dates, sorghum stem borer, Chilo partellus, sorghum shoot fly, Atherigona soccata