EFFICACY OF CERTAIN NATIVE BOTANICAL EXTRACTS AGAINST TWO SPOTTED SPIDER MITE, TETRANYCHUS URTICAE (KOCH) ON HORSE GRAM.

Horse gram, Macrotyloma uniflorum L. a highly protienous pulse crop of greater importance, is widely grown in India. Horse gram is cultivated throughout the year both under irrigated and rainfed conditions. It is obvious that the quality and quantity of the horse gram was drastically reduced by various insect and non-insect pests. Among these pests, two spotted spider mite, Tetranychus utricae (Koch) also cause heavy damage to the horse gram crop. Study was carried out to evaluate the efficacy of various native botanical extracts and two acaricides against two spotted spider mite on horse gram. Treatments includes the Andrographis leaf extract, Pongamia leaf extract, Eucalyptus leaf extract, Vitex leaf extract, Lawsonia leaf extract, Dicofol and Proporgite, an untreated check were tested for its efficacy against mite. The mite mortality was recorded as maximum in case of dicofol and proporgite followed by the Acalypha and Vitex leaf extracts. As maximum mite mortality was recorded in case of Proporgite (81.06%) and Dicofol (79.58%) followed by Andrographis leaf extract (63.27%). Vitex leaf extract (60.72%) and Pongamia leaf extract (60.58%) recorded on par efficacy against mite. Eucalyptus leaf extract shows moderate efficacy against mite. The least was recorded in case of the Lawsonia leaf extract (48.31%) against two spotted spider mite after 48 hours of release. [ABSTRACT FROM AUTHOR]