Abstract
A study was conducted to evaluate the relative population abundance of foliar aphid on wheat at three locations (Karnal, Niphad and Kharibari) sown on three different dates during rabi season of 2013-14 and 2014-15.The highest seasonal average population of aphids of 44.5 and 61.5 aphids per tiller at Karnal and Niphad, respectively were recorded on the crop sown during Ist fortnight of November and the lowest seasonal average population of 4.3 and 2.7 aphids per tillerat Karnal and Niphad, respectively were recorded on crop sown during 2nd fortnight of December. The studies indicated that early planted crop during November month provided the congenial weather conditions for aphid proliferation during crop growth period.
Highlights
Aphid population under wheat agro-ecosystem is regulated by number of biotic and abiotic factors (Asin and Pons, 2001; Aheer et al, 2007)
Recorded on the crop sown during Ist fortnight of November at Karnal and Niphad, respectively
The lowest average population (4.3 and 2.7 aphids/tiller) was recorded on crop sown during 2nd fortnight of December at Karnal and Niphad, respectively
Summary
Aphid population under wheat agro-ecosystem is regulated by number of biotic and abiotic factors (Asin and Pons, 2001; Aheer et al, 2007). The wheat crop was sown at four different dates viz., 1st November (Ist fortnight), 16thNovember (2nd fortnight), 1st December (Ist fortnight) and 16thDecember (2nd fortnight) during each year at two locations i.e. Karnal and Niphad. An analysis of variance (ANOVA) was performed to determine the effect of location and date of sowing of wheat on aphid population.
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