COMPARATIVELY STUDY ON MAJOR INSECT PESTS AND SEED YIELD DURING HYBRID SEED PRODUCTION OF CUCUMBER (PANT SHANKAR KHIRA -1) UNDER INSECT-PROOF NET HOUSE AND OPEN FIELDCONDITIONS

摘要

The present investigation was carried out under insect proof net house and open field at CPCT farm, laboratory observation were at seed testing laboratory, Division of Seed Science & Technology and Department of Horticulture, C.C.R. (P.G) College Muzaffarnagar (U.R) during KhariJ1013 and 2014 in Cucumber (hybrid Pant sankar khira-1). The percentage of incidence of cucumber mosaic virus was negligible under insect proof net house (0%) as compared to open field conditions (56.86%). The incidence of white fly was lower under insect proof net house (17.4) than open field conditions (56.26). The occurrence of leaf minor was significantly lowest under insect proof net house (1.57) than open field condition (18.11). Seed yield per fruit (38.47g), seed yield per plant (73.09g), and seed yield per hectare (1096.42 kg) were also significantly higher under insect proof net house compared to open field conditions. Among the physical parameters of seed viz., seed width, seed coat weight showed significant difference and was also higher in insect proof net house, where as non-significant difference for seed length and cotyledon weight was recorded. The retention of two fruit per plant gave higher seed yield per plant (60,51 g) and seed yield per hectare (908.55kg) than the one fruit per plant (40.21 g & 603.15kg, respectively).