Fruit set, fruit development and eruit drop in hard and soft flaked types of jack (Artocarpus heterophyllus Lam.)

Abstract

Studies on fruit set, fruit drop and fruit development in ' Varikka' and ' Koozha' types of jack (Artocarpus heteropkylhis Lam.) have indicated that the fruit set under natural condition was 83.335?,. The post-set drop ranged from 3040% in the two types studied. The peak period of drop was observed between the 60th and 80th day after emergence of the catkin. The time required for full development of fruit ranged from 100 to 138 days. Growth of fruit showed a sigmoid pattern, the rate being rapid up to the first 80 days and thereafter declined gradually The two types 'Varikka' and 'Koozha' did not vary significantly in any of the above characters.