HOST RANGE OF CHILLI THRIPS, Scirtothrips dorsalis Hood IN KARNATAKA

P. DURAIMURUGAN, A. JAGADISH

Abstract


Scirtothrips dorsalis Hood, (Thysanoprera:  Tliripizlae) a serious pest of chillies, is also a  major pest of grapes in Karnataka. It has been  found to infest about 20 hosts, including important  crops like tea, cotton, castor and mango  (Ananthakrishnan, 1971). The chilli thrips,  S. dorsalis, mostly a leaf thrips, has recently  become a major pest of rose flowers in Karnataka  (Onkarappa and Mallik, 1998). As alternate host  plants help in build-up of the thrips an  investigation was undertaken with a view to know  the host range of S. dorsalis.  Surveys were undertaken at fortnightly  intervals to record different hosts of S. dorsalis  in and around Bangalore during 1999~2000. The  places surveyed included the villages,  Thirunahalli, Nandi, Muddenahalli near  Chikkaballapurg Botanical and Medicinal garden,  GKVK and Lalbagh (Horticulture Garden),  Bangalore.


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