Infection of Seedlings of Alfalfa and Red Clover by Concomitant Populations of Meloidogyne incognita and Pratylenchus penetrans
Turner, D.R.; Chapman, R.A.
Journal of Nematology 4(4): 280-286
1972
ISSN/ISBN: 0022-300X PMID: 19319281 Document Number: 51193
A study was made of the invasion of 2-day-old seedlings of lucerne var. Buffalo and red clover (Trifolium pratense) var. Kenland by larvae of Meloidogyne incognita and adults of Pratylenchus penetrans during one to 3-day incubation periods on 1% agar at 24 deg C. When the nematode species were inoculated separately the numbers invading increased arithmetically with increasing numbers in the inoculum but P. penetrans entered both hosts in greater numbers than M. incognita. The preferred host of M. incognita was clover and that of P. penetrans lucerne, but root growth of lucerne was inhibited more than that of clover by both nematodes. When inocula consisting of both nematodes in equal numbers, or 10 of one and 50 of the other species, were used, the numbers invading were not affected, but penetration of M. incognita into lucerne (but not into red clover) was significantly reduced when 50 M. incognita and 200 P. penetrans were inoculated together. When large numbers of P. penetrans entered either plant, invasion by M. incognita was significantly reduced. In the reciprocal situation penetration by P. penetrans was not affected. There are 36 references.