Effect of sowing on population dynamics of aphid Myzus persicae (Sulzer) on cumin

A field experiment was conducted to study the population dynamics of aphid, Myzuspersicae (Sulz.) and to see the effect of sowing dates. Cumin variety Gujarat Cumin 4 (GC-4) was grown during rabi 202021. The incidence and population fluctuation was dependent on the weather parameters. The incidence initiated in third week of December (51^st Standard Meteorological Week-SMW). Initially, incidence was low (6.00 aphids/ three umbels) but it gradually increased and reached the peak in last week of January i.e. 5^th SMW (115.03 aphids/three umbels). The early sown crop (26^th October) had the minimum infestation (68.00 aphid/3 umbels) of aphids and highest seed yield (4.90 q/ ha) was obtained as compared to the late sowing crop on 7^th December (106.50 aphids/ umbels) with minimum seed yield (3.10 q/ ha).