Journal of Biopesticide

Journal of Biopesticide

2010, Vol. 3, Issue1

INFLUENCE OF CERTAIN PLANT PRODUCTS ON THE INSECT POLLINATORS OF CORIANDER


AUTHOR(S)
Harjindra Singh, R. Swaminathan and T. Hussain

ABSTRACT

Investigations were carried out to evaluate the “Influence of certain plant products on the insect pollinators of coriander” at Rajasthan College of Agriculture, Udaipur, during rabi 2008-09. The treatments comprised: Pongamia glabra Vent (seed oil – 1 %), Azadirachta indica A. Juss (seed kernel extract - 5%), formulated neem product (Achook - 0.8%), Azadirachta indica (seed oil - 1%), Azadirachta indica (leaf extract - 10%) replicated 4 times. Reduction in pollinator population was estimated one day after application of the botanicals; whereas, 3 and 5 days after the treatment the mean percentage increase or decrease in the pollinator abundance over control was computed. The plant origin insecticides evinced a decrease in pollinator intensity ranging from (-) 14.52 to (-) 25.06 per cent. The maximum reduction of insect pollinators (25.06%) was recorded from plots treated with neem seed oil (1%). Three days after the treatment the percentage of visiting insect pollinators did not change in plots treated with karanj oil (1%), but the pollinator percentage increased in plots treated with NSKE (5%) and neem leaf extract (10%). Most of the botanical treatments did not have any side-effect 5 days after the treatment; however, plots treated with seed oil (1%) of Azadirachta indica A. Juss continued to show a deterrent effect and the pollinator intensity decreased by 21.57 per cent.


DOI
https://doi.org/10.57182/jbiopestic.3.1.208-211

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