I am using some plant strengtheners on cucumber in order to evaluate cotton aphid population development. The addition of plant strengthener could reduce cotton aphid populations, but I don't know the economic threshold for cotton aphid populations.
On cotton it is 10 aphids (nymphs/adults) per leaf. This should work better for you too.
Dear Prof. Shashikant S. Udikeri,
Cotton and cucumber are two wholly different crops. I do not think that the economic threshold value calculated for cotton will work on cucumber.
Dear Dong,
You can find possibly an efficient ET value at an American URL. It may be a work of about half an hour.
Dear Dr Andras,yes I agree these two are different crops.I just suggested it as an yardstick to start with experiment.Aphids 10 leaf will justify role on any crop.
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