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A fodder sorghum cultivar, ‘Kyushuko 3 go’, suppresses root-knot nematode, Meloidogyne incognita

In: Nematology
Authors:
Gaku Murata NARO, Kyushu Okinawa Agricultural Research Center, Koshi, Kumamoto 861-1192, Japan

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Tomoyuki Takai NARO, Kyushu Okinawa Agricultural Research Center, Koshi, Kumamoto 861-1192, Japan

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Kenta Uesugi NARO, Kyushu Okinawa Agricultural Research Center, Koshi, Kumamoto 861-1192, Japan

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Summary

Commercially available sorghum cultivars were tested for resistance to Meloidogyne incognita in order to select cultivars that combine fodder production with M. incognita population management. Initially in a pot test with 12 sorghum cultivars, ‘Kyushuko 3 go’, a sorghum hybrid, supported very low M. incognita reproduction approximately 40 days after inoculation (dai) with 500 second-stage juveniles (J2) pot−1, similar to the resistant green manure ‘Tsuchitaro’. Further tests for development of M. incognita in roots (20 dai with 150 J2 (root system)−1) indicated that the resistance of ‘Kyushuko 3 go’ acts after nematode root penetration. In field tests in 2015 and 2016, ‘Kyushuko 3 go’ suppressed M. incognita population densities, although some variations in field conditions may influence reproduction of M. incognita on ‘Kyushuko 3 go’. These findings demonstrated M. incognita-resistant fodder sorghum cultivars could be a useful alternative to susceptible cultivars for root-knot nematode management.

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