The present investigation was carried out during Rabi, 2016 at Agricultural Research sub-centre, achalpur, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (MH), India to study the seasonal incidence of major pests and predators on mustard crop. Results of the present investigation showed that, population of aphids attained its peak in 6th MW (7.4/ 5 cm twig) which was favoured by min. temp. of 28.43 oC and max. temp. of 33.71 oC with morning 74.86 % and evening 35.86 % humidity along with no

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... nfall. However, Peak incidence of leaf hopper was recorded in 1st MW (0.2 Larvae/plant) which was favoured by min. temp. of 27.51 oC and max. temp. of 33.00 oC with morning 78.50 % and evening 31.57 % humidity along with no rainfall. Predator, spider population was recorded in 6th MW (0.1) which was favoured by min. temp. of 28.43 oC and max. temp. of 33.71 oC with morning 74.86 % and evening 35.86 % humidity along with no rainfall.