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Impact of Azter (azadirachtin 0.15% EC), a neem-based pesticide, against tea red spider mite, Oligonychus coffeae Neitner (Acarina: Tetranychidae), and its natural enemies

Vasanthakumar, Duraikannu, Babu, Azariah, Shanmugapriyan, Rajagopalan, Subramaniam, Sankara Rama
International journal of acarology 2013 v.39 no.2 pp. 140-145
Mallada, Oligonychus coffeae, Tetranychus urticae, acaricidal properties, azadirachtin, ecosystems, eggs, integrated pest management, leaves, mortality, natural enemies, nontarget organisms, pesticides, tea
Azter (azadirachtin 0.15% EC), a neem-based pesticide, was evaluated for acaricidal activity against the red spider mite (RSM) Oligonychus coffeae at three different concentrations (1125, 2250 and 3375 mL/ha) under laboratory and field conditions. All the tested concentrations caused 100% mortality under laboratory conditions. When RSMs were provided with Azter-treated leaves for egg-laying, the numbers of eggs laid were significantly lower than that on untreated control leaves. Application of Azter did not affect the non-target organisms such as Mallada desjardinsi and Oligota pygmaea (natural enemies of RSM). Based on the results obtained from the laboratory studies, a field study was conducted to confirm the acaricidal effect of Azter and the results revealed the potential utility of this neem-based biopesticide as safer for natural enemies in an integrated pest management programme against RSM to minimize the pesticide load in the tea ecosystem.