PLANT-PARASITIC NEMATODES ASSOCIATED WITH GINGER (ZINGIBER-OFFICINALE) IN MADHYA-PRADESH AND DENEMATIZATION OF INFESTED RHIZOME BY THERMOTHERAPY FOR MANAGEMENT

A study was conducted during 1991-94 on 9 genera of plant parasitic ne matodes associated with ginger (Zingiber officinale L.) in 6 districts of Madhya Pradesh. Meloidogyne incognita was predominant with 63% abs olute frequency of occurrence in the state. Denematization of ginger r hizomes by thermotherapy at 45 degrees C for 3 hr disinfected the ging er rhizomes which resulted in the increased number of pseudostems and shoot-root weight. When such disinfected ginger rhizomes planted in th e field, there was 19.29-34.41% increase in yield over control.