The present investigation entitled "Aphid diversity and associated predatory fauna in different cropecosystems of Akola" was carried out during the year 2017-2018. During study period total 1810 specimens of aphids and 205 specimens of predatory fauna associated with aphids collected from various Kharif and Rabi crops agro-ecosystem. The collected data revealed that total seven species of aphids and sixteen species of predators were collected from different crop agro-ecosystem. In aphids seven species viz; Aphis gossypii (Glover), Aphis craccivora (Koch), Rhopalosiphum maidis (Fitch), Aphis (Taxoptera) citricidus (Kirkaldy), Lipaphis erysimi (Kaltenbach), Hysteroneura setariae (Thomas) and Uroleucon compositae (Theobald). Aphid's population varied in the Kharif and Rabi crop season in the various crop fields, maximum population of aphids was observed in the month of November-December. However, moderate to rich species biodiversity of aphids species was noticed as per Shannon Biodiversity Index (H'=1.545) in Akola vicinity during kharif 2017-18. Simpson index value was 0.75. The Evenness index had a value of 0.79. Species wise data of aphids showed rich fauna of U. compositae with 37.24 per cent.
Present experiment was carried out on biology and life studies of red spider mite, Tetranychus macfarlanei on okra under laboratory conditions at 30.8-35.1 0 C temperature and 64.5-74% relative humidity at Dr. P. D. K. V., Akola. The total developmental period of T. macfarlanei from egg to adult emergence is recorded less in male (9.0 ± 0.17 days) than female (10.32 ± 0.19 days). T. macfarlanei showed a sexual and arrhenotokous parthenogenesis. Mated female produced a progeny in the ratio 1 male: 4.14 females; whereas, unmated female produced only males. Egg viability was recorded as 93.2 ± 1.17 percent. Adult longevity for male, mated female and unmated female was 11.05 ± 0.99 days, 11.68 ± 1.68 days and 12.45 ± 1.48 days respectively.
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