Root-knot nematode species and the frequency of resistance-breaking nematodes in major green pepper production regions of Japan

Iwahori, Hideaki; Uesugi, Kentaro; Sugita, Wataru

doi:10.3725/jjn.45.57

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…found in most sweetpotato fields were identified as M. incognita ( Iwahori et al 2000 ). This species was also detected in the northern region of Kanto including Ibaraki and Chiba prefectures, the second major production area for sweetpotato ( Iwahori et al 2015 , Yoshida 1965 ). Sano and Iwahori (2005) indicated that nine races, SP1 to SP9, were identified from 129 populations collected from Kyushu and Okinawa, Japan, based on different responses to five sweetpotato cultivars.…”

Section: Southern Root-knot Nematodementioning

confidence: 88%

Review of major sweetpotato pests in Japan, with information on resistance breeding programs

et al. 2017

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Sweetpotato (Ipomoeae batatas (L.) Lam.) is an important food crop affected by several pests throughout the world, especially in tropical, subtropical, and temperate regions. Although Japan is relatively free from many serious sweetpotato pests, some pests, especially soil-borne pathogens, viruses, and insects such as plant-parasitic nematodes and weevils, cause severe damage in Japan. In this review, we describe the current status and management options for sweetpotato pests and diseases in Japan and review research related to sweetpotato breeding that can promote resistance to these problems. Furthermore, we describe methods to evaluate resistance to pests and disease used in sweetpotato breeding at the National Agriculture and Food Research Organization (NARO).

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Section: Southern Root-knot Nematodementioning

confidence: 88%

Review of major sweetpotato pests in Japan, with information on resistance breeding programs

et al. 2017

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Southern root-knot nematode race SP6 is divided into two races

Tabuchi

Kuranouchi

Kobayashi

et al. 2017

Japanese Journal of Nematology

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The southern root-knot nematode (SRKN) includes at least nine races, SP to SP , which were identified based on their different responses to five differential s we e t p o t a t o c u l t i v a r s , ' No r i n -', ' No r i n -', 'Tanegashimamurasaki-', 'Elegant Summer', and 'J-Red'. In this study, we propose a modified method for SRKN race identification in which the threshold of response is egg masses instead of the two-egg-mass threshold used in the original method, when a sweetpotato plant was inoculated with second-stage juveniles. According to this method, two isolates of SP , Okiishiand Ishigaki-, showed the same response to each of these five cultivars. We found, however, that three sweetpotato cultivars, 'Murasakimasari', 'Suzukogane', and 'Chienoha', were resistant to the Okiishi-isolate and susceptible to the Ishigaki-isolate. These results indicated that the Okiishi-and Ishigaki-isolates were distinct and that SP included at least two races. We suggest that the Okiishi-and Ishigaki-isolates should be distinguished by sub-numbers and designated SPand SP -, respectively. Five isolates of SP collected from a sweetpotato field in Chiba prefecture were examined, and all of them were identified as SP -. Nematol. Res. ( ), -( ) Key words: Meloidogyne incognita, new race, SP -, SP -, sweetpotato

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Root-knot nematode species and the frequency of resistance-breaking nematodes in major green pepper production regions of Japan

Cited by 2 publications

References 9 publications

Review of major sweetpotato pests in Japan, with information on resistance breeding programs

Review of major sweetpotato pests in Japan, with information on resistance breeding programs

Southern root-knot nematode race SP6 is divided into two races

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