Tomato seedlings in a growth chamber were inoculated with 150 Meloidogyne incognita eggs and 25 infective juveniles (IJ)/cm² of Steinernema feltiae, S. riobrave, or Heterorhabditis bacteriophora. With the exception of seedling roots treated with H. bacteriophora, all seedlings treated with entomopathogenic nematodes had fewer M. incognita juveniles inside roots and produced fewer eggs than the ...

Excised tomato roots were examined histologically for interactions of the fungus Paecilomyces lilacinus and Meloidogyne incognita race 1. Root galling and giant-cell formation were absent in tomato roots inoculated with nematode eggs infected with P. lilacinus. Few to no galls and no giant-cell formation were found in roots dipped in a spore suspension of P. lilacinus and inoculated with M. inc...

Soreshin of cotton was more severe from combined infections of Rhizoctonia solani and Meloidogyne incognita than from either organism alone, when both critical soil temperature and inoculum concentrations were present. Optimum soil temperatures for disease development from combined infections were 18 and 21 C. Either 2,500 or 5,000 M. incognita larvae per plant, combined with R. solani, increas...

Nematicides are used to control a wide variety of nematodes on many crops; unfortunately, oftentimes the control they provide is erratic. This erratic behavior is not always predictable and has been associated with chemical, physical, and biological degradation of nematicides. Their accelerated degradation is an agricultural problem that has been observed in crop monocultures and in other crop ...

1. Araujo, M. T., D. W. Dickson, J. J. Augustine, and M. J. Basset. 1983. Reproduction of two races ofMeloidogyne incognita in tomato plants grown at high temperature. Journal of Nematology 15:640-641. 2. Carter, W. W., S. Nieto, Jr., and J. A. Veech. 1977. A comparison of two methods of synchronous inoculation of cotton seedlings with Meloidogyne incognita. Journal of Nematology 9:251-253. 3. ...

T h e effect of high soil t empera ture on resistance of tomato (Lycopersicon esculenturn Mill.) to Meloidogyne spp. has been repor ted by several authors (3,4,5). However, the susceptibility of tomato grown at high soil temperatures to different races o£ M. incognita (Kofoid and White) Chi twood has not been reported. This mat te r must be considered an impor tan t factor in a tomato screening...