The Effectiveness of Neem Cake (Azadirachta indica) Water Extract against Aphids (Aphis gossypii) on Red Chili Plant

Aphis gossypii is one of the factors that reduce chili production which acts as a pest and virus vector. This research aimed to determine effectiveness application neem cake water extract A. on red plants. consisted 2 experimental stages, namely in laboratory greenhouse trials. The design used completely randomized with treatments A (Control), B (0.3%), C (0.6%), D (1.2%), E (2.4%), F (4.8%). Each treatment replicate 4 times. Aplication by dipping method chilli leaf. After leaf feed air dried, then put into plastic box invested 10 nymph gossypii. While experiments block were (LC50), (1.5xLC50), (2xLC50), (2.5xLC50), (3xLC50). concentration experiment based result at laboratory. Adults much 20 every plant. Application plants once days. results showed effective Gossypii 0.14% LC50. Neem 1.5xLC50 (0.21%) was suppressing population