The study focused on the ecological analysis of plant and soil nematode communities associated with vegetables-maize crop sequences in the eastern fringe of Kolkata at Dhapa from December 2011 to April 2014 at a monthly interval. Plant-parasitic nematodes like Pratylenchus zeae, Meloidogyne incognita, Hoplolaimus indicus, Helicotylenchus dihystera, Tylenchorhynchus brevilineatus, Rotylenchulus reniformis, and Criconemoides onoensis were observed in two major cropping sequences of chilli-amaranthus-maize-radish-cauliflower and amaranthus-maize-cabbage-chilli. Among them, R. reniformis was found to be the most prevalent genera with the highest relative prominence value (RPV) of 27.29 followed by P. zeae (20.30) and T. brevilineatus (16.70). The population dynamics of P. zeae revealed the lowest density of the nematode was recorded (26 per 200 cc of soil + 5 g of the root) in March and the highest (634) in September. The variation in the abundances of other PPNs was also noted, and that attributed to the crops in the crop sequence and weather conditions. Low numbers of R. reniformis was found in the maize rhizosphere. The saprozoic nematodes (SNs) maintained higher mean densities (1734/200 cc soil); they were recorded in high numbers in the rainy season as compared to other seasons. No significant differences in the Shannon diversity index (H′), evenness (J) were observed across the growing period. A significant relationship was found between nematode abundance and climatic variables observed. This study provides baseline information on nematodes associated with maize-based cropping system, population abundance, Mylonchulus-SNs relationships, and population fluctuation in response to environmental factors.

该研究的重点是从2011年12月至2014年4月，每月在Dhapa的加尔各答东部边缘地区与蔬菜玉米作物序列相关的植物和土壤线虫群落进行生态分析。植物寄生线虫等 短体线虫玉蜀黍赤霉， 南方根结线虫，  Hoplolaimus蜓， 螺旋线虫dihystera， 矮化线虫brevilineatus，  Rotylenchulus形肾，和 Criconemoides onoensis 在辣椒-苋-玉米-萝卜花椰菜的两个主要的剪切序列，并观察苋-玉米- cabbage-辣椒。其中，  R。reniformis 被发现是最普遍的属，具有最高的相对突出值（RPV）为27.29，其次是 玉米 （P. zeae）（20.30）和 短小T. brevilineatus （16.70）。玉米疫霉菌的种群动态表明，线虫的密度最低记录在三月（每200 cc土壤26根，根数为5 g），9月最高（634）。还注意到其他PPN的丰度变化，这归因于农作物的作物序列和天气状况。在玉米根际发现少量的R. reniformis。腐生线虫（SNs）保持较高的平均密度（1734/200 cc土壤）；与其他季节相比，在雨季它们的记录数量很高。在整个生长期中，没有观察到香农多样性指数（H'）和均匀度（J）的显着差异。发现线虫丰度与观测到的气候变量之间存在显着的关系。 棉铃虫-SNs关系以及响应环境因素的种群波动。