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Mann, S. S.
- Screening of Okra (Abelmoschus esculentus) Cultivars for Resistant Against Root-Knot Nematode, Meloidogyne incognita
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Authors
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1 Department of Nematology, C.C.S. Haryana Agricultural University, Hisar (Haryana), IN
1 Department of Nematology, C.C.S. Haryana Agricultural University, Hisar (Haryana), IN
Source
International Journal of Agricultural Sciences, Vol 16, No 2 (2020), Pagination: 203-207Abstract
The ischolar_main-knot nematode (Meloidogyne incognita) is one of the major limiting factors affecting plant growth and yield causing an estimated $100 billion loss per year worldwide. Synthetic pesticides, though instantaneously effective, are usually prohibitively expensive, not readily available, may cause hazards to both man and livestock and inflict injury to the environment. Notable among the alternatives to nematicides, use of resistant cultivars which are inexpensive and eco-friendly is the only and effective option available for its control. In the present studies, seventy one okra (Abelmoschus esculentus) cultivars were evaluated for resistant against M. incognita under screen house conditions. One week old okra plants of test cultivars were inoculated with 1000 freshly hatched second stage juveniles of M. incognita. Results clearly revealed that all the cultivars showed varying degree of susceptibility against M. incognita. One cultivar (EC 306703) showed resistant and seven cultivars (EC 306697, EC 306700, EC 359891, EC 305718, IC 014018, BB-1, Hisar naveen and Hisar unnat) were rated as moderately resistant reaction against M. incognita. Rest of the cultivars exhibited either susceptible or highly susceptible reaction against M. incognita. No any single cultivar has been found as highly resistant. Cultivar, EC 306703 was rated as resistant and showed less damage by nematode as compared to susceptible cultivars and their planting could provide a useful tool to control ischolar_main-knot nematode.Keywords
Meloidogyne incognita, Okra, Resistant, Screening, Cultivars.References
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- Evaluation of Different Rice Genotypes for Resistant Against Rice Root-Knot Nematode, Meloidogyne graminicola
Abstract Views :365 |
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Authors
Affiliations
1 Department of Nematology, C.C.S. Haryana Agricultural University, Hisar (Haryana), IN
1 Department of Nematology, C.C.S. Haryana Agricultural University, Hisar (Haryana), IN
Source
International Journal of Agricultural Sciences, Vol 16, No 2 (2020), Pagination: 249-253Abstract
Screening of different rice genotypes were tested for their resistant reaction against rice ischolar_main-knot nematode,Meloidogyne graminicola. In the present studies, 79 rice genotypes/lines (44 genotypes from OG series and 35 genotypes from AR series including Pusa 1121 and TN-1 as susceptible checks) were evaluated for resistant reaction against M. graminicola was carried out under screen house, Department of Nematology, CCS Haryana Agricultural University, Hisar, Haryana during Kharif, 2019-20. Seeds of each genotype were sown in the earthen pots (1 kg soil capacity) containing steam sterilized sandy loam soil. One week old seedlings of rice genotypes were inoculated with freshly hatched second stage juveniles of M. graminicola @ 2000 J2/pot. Forty five days after inoculation, observations were recorded such as number of eggs and second stage juveniles. The result reveals that the genotypes showed great variation in reaction to M. graminicola from resistant to highly susceptible reaction. Out of 44 genotypes from OG series, 34 showed resistant reaction. However, two genotypes (OG-4 and OG-37) were found moderately resistant and remaining was categorized as susceptible reaction. Similarly, out of 35 genotypes from AR series, two genotypes (AR-08, AR-31) showed resistant reaction against M. graminicola. Four genotypes (AR-06, AR-20, AR-21 and AR-32) showed moderately resistant reaction and rests of the genotypes were categorized as susceptible reaction against M. graminicola. Most of the genotypes were found resistant/moderately resistant to M. graminicola which can be used for future breeding programmes to develop resistant reaction in these genotypes.Keywords
Meloidogyne graminicola, Rice, Resistant, Screening, Genotypes.References
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