In current study, firstly we evaluated the intraguild predation (IGP) in the presence and absence of extraguild prey (
aphids) among C.
The consumption rate of 100 sugarcane
aphids of mixed nymphal stages was compared between larvae and adults of H.
We have observed that this rabi cash crop is severally attacked by many pest specially green
aphids, which cause severe destruction, thus reducing yield (Fig.
But insecticides should be avoided as they often kill beneficial insects - including those which eat
aphids.
Aphids not only distort and stunt young growth and cause secondary problems such as sooty mould - they can also be a disease carrier as they move from one plant to another.
In order to improve the accuracy of
aphid identification and counting, the yellow stickyboard must be corrected to the same size and the same position when a target image has been segmented; getting the elevation view, the
aphids can be counted accurately.
Key words: Canola,
aphid, Lipaphis erysimi, nitrogen application.
Application of insecticides is one way to control cabbage
aphid in canola (Amer et al., 2010; Lashkari et al., 2007).
In total were recorded 8,392
aphids, compound by two species Sitobion avenae (Fabricius, 1794) (85%) followed by Rhopalosiphum padi (Linnaeus, 1758) (15%) (Hemiptera: Aphididae).
Aphids were collected from respective host plants with the help of suction pump brought in the laboratory and placed into freezer at temperature 0C in plastic container (20A-8 cm) for 24 hrs.
Aphids are serious and most destructive insect pests on cultivated plants.
Keywords: Episyrphus balteatus; Development; Predation;
Aphids; Cropland.
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