Influence of Nonhost Plants on Population Decline of Rotylenchulus reniformis
Caswell, E.P.; Defrank, J.; Apt, W.J.; Tang, C.S.
Journal of Nematology 23(1): 91-98
1991
ISSN/ISBN: 0022-300X PMID: 19283098 Document Number: 384300
The influence of Chloris gayana, Crotalaria juncea, Digitaria decumbens, Tagetes patula, and a chitin-based soil amendment on Hawaiian populations of Rotylenchulus reniformis was examined. Chloris gayana was a nonhost for R. reniformis. The nematode did not penterate the roots, and in greenhouse and field experiments, C. gayana reduced reniform nematode numbers at least as well as fallow. Targetes patula was a poor host for reniform nematode and reduced reniform nematode numbers in soil better than did fallow. Crotalaria juncea was a poor host for R. reniformis, and only a small fraction of the nematode population penetrated the roots. Crotalaria juncea and D. decumbens reduced reniform nematode populations at least as well as fallow. A chitin-based soil amendment, applied to 2.24 t/ha to fallow soil, did not affect the population decline of reniform nematode.