SUPPRESSION OF MELOIDOGYNE-JAVANICA AND MELOIDOGYNE-INCOGNITA ON TOMATO WITH GROUND SEED OF CASTOR, CROTALARIA, HAIRY INDIGO, AND WHEAT

Two greenhouse trials were conducted to determine the influence of gro und seed of castor (Ricinus nus communis), crotalaria (Crotalaria spec tabilis), hairy indigo (Indigofera hirsuta), and wheat (Triticum aesti vum) on tomato (Lycopersicon esculentum) growth and egg mass productio n of Meloidogyne javanica (test 1) or it M. incognita (test 2). Ground seed from each plant species was individually mixed with an air-dried , fine sandy soil at rates of 0, 0.5, 1.0, and 2.0% (w/w). The mixture s were placed in one-liter plastic pots, and water was added to bring soil to field capacity. After ten days, 0 or 10 000 M. javanica or M. incognita eggs and juveniles were added to each pot. A single 'Homeste ad' tomato seedling was transplanted into each pot and allowed to grow for 70 days in test 1 and 75 days in test 2. Compared to the nonamend ed control, egg mass production was significantly reduced by all treat ments except the 0.5% levels of wheat and castor and the 1.0% castor t reatment. The 2.0% levels of ground seed of crotalaria and hairy indig o almost completely suppressed egg mass production of both M. javanica or M. incognita. With the exception of the 1.0% crotalaria treatment in test 2, total plant weight did not differ among treatments and the control. Levels of the amendments rather than type of amendment had mo re effect on egg mass production.