Assessment of summer vegetable resistance to Meloidogyne incognita and the possibility of the inoculum

Abstract

Seven vegetable genotypes, including tomato (Lycopersicon esculentum L), eggplant (Solanum melongena linn), cucumber (Cucumis sativus L), and okra (Hibiscus esculentus L), planted at significant vegetable production areas, were the subject of a systemic survey to determine the association of plant parasitic nematodes and to evaluate the losses. Twenty locations around the vegetable growing region were used to gather 130 samples. The findings indicated that plant parasitic nematodes were present in 85% of the vegetable fields. In decreasing frequency, the plant parasitic nematodes discovered infecting vegetables were Helicotylenchus spp. (Steiner) (3.2%), Xiphinema spp. (Cobb) (5.1%), Meloidogyne javanica (Treub) (6.0%), Pratylenchus spp. (Thorne) (15.2%), and M. incognita (Kofoid & White) Chit. (85.0%) The average prevalence of plant parasitic nematodes was 47.19%, ranging from 0 to 85.0%. In the majority of the examined vegetable crops, Pratylenchus spp. and M. incognita population concentrations were possibly hazardous. We found yield losses of 32.5% for four commercially cultivated vegetables, greater than those in industrialized nations. Increased losses might result from growers' ignorance of these plant parasitic nematodes. Experiments were conducted in the greenhouse at a temperature of 25°C to test seven summer vegetables for Meloidogyne incognita infection. Cucumber roots had much more galls and egg masses at harvest than the other genotypes' roots. M. incognita's invasion and growth were tested on cucumbers. The way each therapy responded to the M. incognita infection varied. Maximum nematode invasion and growth were seen across all treatments. Relationship between root weight and the quantity of M. incognita growing. Keywords: Cucumber, Nematode, association, vegetable, Tomato, okra, eggplant