1Agricultural Research Station, Kadiri, Acharya N.G. Ranga Agricultural University, Andhra Pradesh, India
2Regional Agricultural Research Station, Nandyal, Acharya N.G. Ranga Agricultural University, Andhra Pradesh, India
3Regional Agricultural Research Station, Tirupati, Acharya N.G. Ranga Agricultural University, Andhra Pradesh, India
4S.V. Agricultural College, Tirupati, Acharya N.G. Ranga Agricultural University, Andhra Pradesh, India
* E-mail: sudheer_john@rediffmail.com
Systematic survey was conducted in Anantapur, Chittoor, Guntur, Kadapa, Kurnool, Mahaboobnagar, Nalgonda, Nellore and Prakasam districts of Andhra Pradesh for plant parasitic nematode association with the economically important crops in these districts. Analysis of community structure revealed that Meloidogyne incognita was major problem in Anantapur and Chittoor associated with tomato, pomegranate, banana, chilli, muskmelon, brinjal, mulberry and gourds. Rotylenchulus reniformis was predominant in Guntur and Mahaboobnagar districts associated with turmeric, castor, red gram and cotton. Helicotylenchus spp. was major in Kadapa, Kurnool, Nalgonda and Prakasam districts associated with sunflower, banana, chilli, sugarcane, cotton and tomato. M. graminicola was found only in Nellore district. Cluster analysis revealed the similarity index of mandals in different districts. Highest prominence value was found for Helicotylenchus spp. (7.65) in Kadapa district followed by M. incognita (7.33) in Chittoor district. Least prominence value was observed for R. reniformis (3.53) in Mahaboobnagar district.
Community structure, diversity, hot spot areas, prominence value
