GUPTA, RAKESHSEN, SHALINI2019-11-152019-11-152019-11http://krishikosh.egranth.ac.in/handle/1/5810135377ABSTRACT The research work entitled “Status of plant parasitic nematodes in crops under protected cultivation in Himachal Pradesh and their management in rose” was undertaken to ascertain the status of plant parasitic nematodes in the state of Himachal Pradesh and explore the possibilities of nematode management in rose, a highly nematode infested crop grown in mid-hill region of Himachal Pradesh, by using different nematode management practices. Faunistic presence of plant parasitic nematodes with prominence on species of different nematodes was conducted by collecting 281 soil samples from the vegetations covering all the districts of Himachal Pradesh. Samples, when analysed in laboratory revealed the nematode genera viz., Meloidogyne incognita, Helicotylenchus dihystera, Pratylenchus coffeae and Hoplolaimus indicus in all the districts irrespective of climate conditions and altitude. Of these, M. incognita was found to be the most predominant. Four major genera of plant parasitic nematodes were identified from different host crops based on their morphological characters, perineal patterns of the female and morphometric measurements. The effect of four different inoculum levels of root-knot nematode on eight varieties of rose viz., Yellow Miniature, Iceberg, Keyene Lijipet, Tajmahal, Gold Master Piece, Ashwani, A-1 and Gold Strike revealed a significant increase in soil population of nematodes and decrease in growth parameters as an increase in inoculum levels. Of these, eight varieties screened against root-knot nematode, two varieties were found to be highly susceptible, five varieties were found to be susceptible and one variety was found to be moderately resistant. Among all the treatments and their combinations, neem formulation 1ml/l + dazomet @ 40 g/m2 application in the polyhouse as well as in the open field was most effective in reducing nematode population as well as increasing growth parameters and yield. This treatment was followed by the treatments of carbosulfan @ 500 ppm+ dazomet @ 40 g/ m2 that was statistically at par with the yields obtained from dazomet. The plots that did not receive any treatment, suffered maximum losses in terms of yield as well as plant vigour. It can be concluded from the study that dazomet is effective in reducing M. incognita population and root gall index in rose. However, its efficacy can be enhanced by adding neem or mustard cake that accelerates the plant growth parameters in case of rose.ennullThesis