Author(s):

Naveen B, Sushila Nadagouda, Ashoka J and Kariyanna B

Abstract: A field experiment was conducted at Main Agricultural Research Station, Raichur, during <em>kharif</em> 2015 and <em>rabi</em>2016 to study the natural enemies of capsule borer, <em>Antigastra catalaunalis </em>(Dup.) on sesame and its correlation with weather parameters. The natural enemies recorded were coccinellid beetles and spiders in the sesame field during <em>kharif</em>. Coccinellid beetles population ranged from 0.2 to 2.1 per plant during the cropping period in <em>kharif</em>. The population of coccinellid beetle reached maximum during the fourth week of October (43^rd standard week) with adult population of 2.1 per plant and gradually declined thereafter during the month of November (0.3 / plant).The spider population was recorded from fourth week of September and it reached highest during the fourth week of October (1.15 / plant). Coccinellid beetle population varied from 0.1 to 1.8 larvae per plant during the cropping period during <em>rabi</em> with highest being recorded during the second week of February and gradually declined thereafter in the month of third week of February. The larval parasitoids were reared from larvae of the sesame leaf Webber <em>Antigastra catalaunalis</em> (Duponchel.) on sesame. These parasitoids recorded were <em>Eriboru s</em>sp. (Hymenoptera: Ichneumonidae), <em>Trathala flavoorbitalis</em> (Cameron) (Hymenoptera: Ichneumonidae), <em>Bassus</em> sp. (Hymenoptera: Ichneumonidae) <em>Habrobra conhebetor </em>(Say) (Hymenoptera: Braconidae), <em>Phanerotoma</em> sp. (Hymenoptera: Braconidae), Agathidinae (Hymenoptera: Braconidae). The infected larvae of capsule borer were brought to the laboratory and reared them in the cages to look for the emergence of parasitoids. The major predators were Coccinellid beetle and spider.

Pages: 257-259  |  1387 Views  539 Downloads

Download (461KB)