EFFECT OF DATES OF SOWING ON THE INCIDENCE OF CHICKPEA POD BORER IN FIELD AND PULSE BEETLE IN STORAGE

Abstract

The study was carried out in the field of Sher-e-Bangla Agricultural University farm, Sher-e-Bangla Nagar, Dhaka, Bangladesh during the period from November, 2007 to February, 2008 to find out the effect of dates of sowing on the incidence of chickpea pod borer in field and pulse beetle in storage. The experiment consists of 6 treatments VIZ, T1: sowing on 15 November, 07; T2: sowing on 25 November, 07; T3: sowing on 5 December, 07; T4: sowing on 15 December, 07; T5: sowing on 25 December, 07 and T6: sowing on 4 January, 08. The field experiment was laid out in Randomized Complete Block Design (RCBD) and the laboratory experiment was laid out in a Complete Block Design (CRD). The healthy pod, infested pod and pod infestation by number and weight, average infestation by number and weight and yield of seed infestation in storage were recorded. The lowest average pod infestation per plant by number (6.62%) was recorded from T3 and the highest (15.83%) was recorded from T6. The minimum average pod infestation per plant by weight (7.35%) was recorded from T1 and the maximum pod infestation per plant (16.94%) was recorded from T6.The longest plant (87.83 cm) was recorded from T3 and shortest plant (80.40 cm) was recorded in T1 . The highest yield (1.32 tonTha) was recorded from T3 and the lowest yield (1.20 tonlha) was obtained from T6. At 30, 40, 50, 60, 70, 80 and 90 DAS the lower seed infestation by number 5.56%, 5.78%, 7.56%, 8.67%, and 9.78%, respectively in Seeds of treatment T3.On the other hand, the higher seed infestation by number were 16.00%, 16.67%, 18.67%, 19.33%, 20.67%, 21.33% and 23.78% at those DAS, respectively in Seeds of treatment T6.