Vol. 10, Special Issue 10 (2021)

Author(s):
Elakkiya S, Suganthy M, Bhuvaneswari K, Rajasree V, Renugadevi J and Senthamizh Selvi B

Abstract:
Coriandrum sativum is an important green leafy vegetable as well as seed spice crop. Among the various insect pests infesting coriander, the coriander aphid, Hyadaphis coriandri is a regular and major pest of coriander and responsible for reduction in crop yield. Development of eco-friendly pest management practices is essential in the production of high quality and pesticide residue free produces. Field experiment was conducted at Pappampatti, Coimbatore district, Tamil Nadu from January 2021 to April 2021 to develop IPM module for the management of aphids, Hyadaphis coriandri infesting coriander. Results of the field experiment revealed that among the treatments, IPM module (T₅) comprising of designer seed treatment [Polymer (3g) - thiamethoxam 5 FS (5g) - azospirillum (120g) - Trichoderma viride 4 g per kg of seed] - border cropping with cowpea - erecting yellow sticky traps at 12/ha - need based application of spinosad 45 SC @ 75 ml per acre recorded the lowest mean population of aphids (5.72 aphids per three umbels plant^-1) followed by another IPM module with azadirachtin 10,000 ppm (T₄) (7.07 aphids per three umbels plant^-1) and farmer’s practice (7.77 aphids per three umbels plant^-1). The IPM modules (T₄ and T₅) were designed in such a way that they are safe to the natural enemies, which recorded the highest population of coccinellids viz., 1.59 and 1.57 coccinellids per plant, respectively. Maximum harvestable seed yield of 960 kg/ha was recorded in T₅, the IPM module with spinosad 45 SC followed by farmer’s practice (857 kg/ha). Hence, the IPM module with spinosad 45 SC (T₅) is adjudged as the best treatment for the management of coriander aphids, H. coriandri.