Evaluation of some plant products for their oviposition deterrent properties against the Callosobruchus maculatus (F.) on Chik pea seeds

Investigated six plant extracts viz.,, kaner leaf extract (Nerium indicum), khejri leaf extract (Prosopis cineraria), neem leaf extract (Azadirachta indica), safeda leaf extract (Eucalyptus globulus), tomato leaf extract (Lycopersicum esculentum) and mustard seed extract (Brassica compestris) and four plant powders viz.,, black pepper powder (Piper nigrum), garlic clove powder (Allium sativum), tulsi leaf powder (Ocimum sanctum) and turmeric rhizome powder (Curcuma longa) were evaluated for their oviposition deterrence properties against Callosobruchus maculatus (F.). Three doses (0.5, 0.75 & 1.0ml/100gm or gm/100gm) of each plant product were tested in the present studies. The maximum oviposition deterrence (55.86%) was recorded with neem leaf extract at the highest dose level (1.0ml/100gm) and minimum (36.98%) with garlic clove powder at lowest dose level (0.5gm/100gm). An increase in oviposition deterrence was noted with an increase in treatment dose for various protectants. All the doses of different plant protectants showed significant reduction in fecundity of test insect in comparison to control. The reduction in fecundity may be attributed to the toxicity of plant extracts and plant powders, affecting the normal physiology of the insects.