Intensity, Occurrence and redescription of Aglenchus parvus Siddiqi, 1963 and Helicotylenchus siddiqii Handoo, 1977 on Brassica oleracea (Cauliflower) and Allium cepa (Onion) respectively in Kashmir, india
Javaid Hassan
Department of Zoology, Government Degree College, Kulgam-192231 J&K (India) Corresponding email ID: javaidsj@gmail.com , 9797148289
ABSTRACT
The plant parasitic nematodes are common pests of vegetable crops and its yield loss is often due to their high densities, making it essentially important for nematologists to make a thorough data base of such pests, their description and population dynamics in order to devise an effective management strategy. During the period 2018 to 2020 a study was taken up with the objective of making a general survey of plant parasitic nematodes and their population analysis occurring on Brassica oleracea (Cauliflower) and Allium cepa (Onion) in Kashmir valley. On examining the soil and root samples duringsuch survey after adopting Cobb’s Sieving and Baerman’s funnel method to find out biodiversity,two significant species of nematodes belonging to the order Tylenchida were found to be enormously prevalent and are described herein with alterations from the original probably because of habitat change especially the host and changing climatic conditions. Aglenchus parvus Siddiqi, 1963 and Helicotylenchus siddiqii Handoo,4 were met with the varied intensity on these hosts. Helicotylenchus siddiqii Handoo,4 was met with 90% of absolute frequency and 37% of Absolute density while as Aglenchus parvus Siddiqi,13 was met with 83.3% and 35% of the values respectively.The species as is collected from Allium cepa (Onion) is a first time report of its occurrence on this host in this region of India as it was found on Eruca sativa 4.