Vol. 8, Special Issue 12, Part R (2024)

The sucking pests, aphid and thrips were observed in last week of October and first week of November to last week of January respectively. Aphid Population of aphid 8 per twigs (10 cm from top) of a plant were first appeared during third week of October (43^th SMW) with the maximum number 49.32 insect per twigs were observed during 4^th week of December (52^th SMW), and The incidence of black thrips was first observed as a minute insect on the flower petals 1st week of November (45^th SMW) with 6.70 average population per plant then it gradually increased to 17.40 insect including nymph and adult second week of December (50^th SMW). The infestation of bud caterpillar on marigold during last week of November (44^th SMW) and remain up to the maturity stage of the crop. The highest population (5.70 larvae per plant) of the insect was recorded in third week of December (48^th SMW), and lowest population 1.20 caterpillar per plant of marigold at second week of January 2024 (2nd SMW). The population of natural enemies on marigold field was observed on the basis of number from third week of October 2023 to last week of January 2024.