Prevalence of plant parasitic and predatory nematodes associated with different crops of Badaun districts (Uttar Pradesh).
Rashid Pervez
Author Affiliation: Division of Nematology, Indian Agricultural Research Institute, New Delhi, India.
Current Nematology 15 : 43-46
Abstract : One hundred and fifty soil samples collected from different crops (rice, wheat, barley, Indian mustard, mango, citrus and mulberry) cultivated in Badaun district showed the presence of sixteen species of plant parasitic and thirteen of predatory nematodes viz., Hirschmanniella oryzae, Tylenchorhynchus mashhoodi, Helicotylenchus indicus, Hoplolaimus indicus [Basirolaimus indicus], Hemicycliophora dhirendi, Tylenchus sp., Hirschmanniella sp., Scutellonema sp., Basiria graminicola, Xiphinema americanum, Xiphinema basiri, Longidorus attenuatus, Paralongidorus sali, P. mirzae and Trichodorus indicus. The rice root nematode, Hirschmanniella oryzae had the highest absolute frequency 83.0, relative frequency of 17.5 and relative prominence value of 22.7 per cent, followed by the stunt nematode, Tylenchorhynchus mashhoodi with an absolute frequency of 78.0 and relative prominence value of 15.2%. Among the plant parasitic species P. sali had the maximum biomass of 53.9 µg. The predatory nematodes encountered were Laimydorus baldus, Dorylaimus stagnalis, Mesodorylaimus bastiani, Labronema sp., Discolaimus major, Eudorylaimus chauhani, Aporcelaimus nivalis, Aporcelaimus sp., Aquatides thomei, Nygolaimus sp., Mononchus aquaticus, Mylonchulus minor and Mylonchulus dentatus. Among the predatory nematodes, Laimydorus baldus had the absolute frequency of 49.3, relative frequency of 16.6 and a relative prominence value of 26.7. D. stagnalis had the maximum biomass of 310.3 µg with an importance value of 108.0 and relative importance value of 36.1%.