Author(s):

Neeta Devi Sharma and Anju S Khanna

Abstract: The research explorations were conducted to know the damaging potential of grubs as well as adults of Cyllodes indicus in Pleurotus sajor caju for the very first time in Himachal Pradesh. Insect free control bags yielded sporocarp production of 461.8 g, up to third week. Significantly reduced yields of 429.0 g, 279.6 g and 201.1 g were recorded in the bags with initial release of five, ten and twenty grubs, respectively. Similarly, 391.8 g sporocarp production were observed in insect free control bags as compared to bags inoculated with five, ten and twenty adults, respectively resulting in significant reduced yield of 289.0 g, 181.5 g, 133.1 g sporocrps utpo four weeks. Adults of the beetle caused more destructive losses as compared to the grub population in total yield of Plerotus sajor caju. In addition to quantitative losses, qualitative losses were also incurred in the form of tunneling in the stipe and hymenium, irregular holes and fringing of sporocarps which rendered them unfit for consumption and unmarketable. The highly destructive role of C. indicus grubs and adults on oyster mushroom can be visualized from these data.

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