V. Sathyaseelan, M. Senthilkumar and M. Pazhanisamy
Department of Entomology, Faculty of Agriculture, Annamalai University, Annamalai Nagar, Chidambaram-608 002
(Tamil Nadu), India
*(e-mail : osathyamagri@gmail.com; Mobile : 98948 78300)
(Received : February 20, 2021; Accepted : April 11, 2021)
ABSTRACT
Bhendi two-spotted spider mite, Tetranychus utricae (Koch) is causing heavy damage to the bhendi crop.
The study was carried out to evaluate the efficiency of various indigenous botanical extracts and two
acaricides against two-spottted spider mite on bhendi. Treatments included leaf extracts of Mimosa
puduga, Vitex negundo, Cleome viscosa, Acalypha indica, Cleodendron inermi and Melia azadirachta along with
Dicofol and Fenazaquin were for their efficacy. The maximum mite mortality was in case of Fenazaquin
(93.00%) and Dicofol (82.00%) followed by M. azadirachta leaf extract (72.35%) and V. negundo leaf extract
(66.34%). The A. indica leaf extract (61.18%) and C. inermi leaf extract (60.00%) showed at par efficacy. C.
viscosa leaf extract recorded moderate efficacy (55.48%). The least mortality was recorded in case of the
M. puduga leaf extract (47.22%) against two-spotted spider mite after 48 h of release. As the time
increased, the efficacy of the treatments showed a decreasing trend. The efficacy of the leaf extracts
was inversely proportional to the time duration.
Key words : : Two-spotted spider mite, indigenous botanical extracts, acaricides