Host dependent demographic parameters of spider mite Oligonychus biharensis (Hirst) on two bean species
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ORIGINAL RESEARCH ARTICLE
Host dependent demographic parameters of spider mite Oligonychus biharensis (Hirst) on two bean species A. H. M. Roknuzzaman 1 & Rumpa Basak 1 & Sabrina Jahan Rimy 1 & Dilruba Sharmin 1 & Masum Ahmad 1 & Mohammad Shaef Ullah 1 Received: 21 May 2020 / Accepted: 14 September 2020 # African Association of Insect Scientists 2020
Abstract The influence of two economic host plants country bean (Lablab purpureus L.) and mung bean (Vigna radiata (L. Wilczek)) on the development, reproduction and demographic parameters of the spider mite, Oligonychus biharensis (Acari Tetranychidae) were constructed using two-sex life table program under laboratory condition at 25 °C, 60–80% RH, and a photoperiod of 16 L:8D h. Both male and female of O. biharensis successfully completed their development from egg to adult on two host plants. Immature development of O. biharensis was shorter on L. purpureus than on V. radiata. Oviposition, lifetime fecundity, female adult longevity of the spider mite was higher on L. purpureus than V. radiata. The net reproduction rate (R0), intrinsic rate of natural increase (rm), mean generation time (tG), finite rate of increase (λ) and gross reproduction rate (GRR) of O. biharensis were significantly affected by host plants. The R0-values of O. biharensis were significantly higher on L. purpureus than V. radiata. GRR also showed the similar trend as of the net reproduction rate. The mean generation time of O. biharensis was higher on V. radiata than on L. purpureus. Based on the intrinsic rate of population increase, L. purpureus was more suitable than V. radiata. The results of the study reveal that the host plants greatly influenced the life parameters of the spider mite O. biharensis and it helps to reveal the population dynamics on particular host plant species. Keywords Spider mite . Host plant . Development . Demographic parameters . Population dynamics
Introduction Spider mites are serious threat for successful production of many crops. There are more than 1300 species of spider mites, of which more than 100 are well known as pests, and about 10 of those considered as major pests (Migeon and Dorkeld 2020). Out of different species of spider mites, Oligonychus biharensis (Hirst) (Acari: Tetranychidae) is one of the serious pests infesting different agricultural crops. O. biharensis is a sporadic pest of many high importance crops, viz. vegetables, rose, camphor, litchi, etc. (Kaimal 2013). Feeding by this mite causes characteristic bronzing on leaves and severe damage to the host plant. Severe infestation and prolonged feeding results in crinkling, subsequent drying and defoliation of
* Mohammad Shaef Ullah [email protected] 1
Laboratory of Applied Entomology and Acarology, Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh
affected leaves. Attack by these mites normally affects the growth and vigor of host plants. Lablab purpureus L. (country bean) and Vigna radiata (L.) Walp. (mung bean), the current host plant proved to be a pot
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