Abstract
The life cycle of Tetranychus macfarlanei Baker and Pritchard was studied on two different medicinal plants, Clitoria ternatea L. and Justicia adhatoda L. Nees, in BOD at 32.5 °C and 75 % RH during April 2007 to May 2007. Observations towards duration of different stages like egg, larva, protonymph, deutonymph, adult, total life cycle, preoviposition, oviposition, postoviposition periods, longevity of female and male, and fecundity, sex ratio were recorded. Total developmental period of T. macfarlanei from egg to adult was 6.4 ± 0.37 (Mean ± SE) and 10.6 ± 0.56 days on C. ternatea and J. adhatoda, respectively. On C. ternatea, the fecundity in case of fertilized and unfertilized female were 91.6 ± 11.61 and 80 ± 21.64 eggs, respectively and longevity of fertilized and unfertilized female was 16.4 ± 1.44 and 8.6 ± 2.32 days, respectively. The corresponding figure on J. adhatoda for fecundity in case of fertilized and unfertilized female were 39 ± 2.85 and 19.8 ± 3.90 eggs, respectively and for longevity was 16 ± 0.37 and 11 ± 086 days, respectively. Among the two hosts, C. ternatea appears to be more preferred to J. adhatoda because life cycle was completed in shorter time and fecundity and female longevity were for longer duration.
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