Effect of temperature on the development of Pratylenchus kumamotoensis
2016
Uesugi, K. (Kyushu Okinawa Agricultural Research Center, NARO, Koshi, Kumamoto (Japan)) | Iwahori, H.
Development of Pratylenchus kumamotoensis eggs was observed in distilled water at 15-35degC. Egg developmental duration was shortest at 32.5degC (5.6 days) and longest at 15degC (28 days). Base temperature and thermal constant estimated from data between 20degC and 30degC were 11.8degC and 108 degree-days, respectively. Population development from a single female inoculated to chrysanthemum was observed at 20, 25 and 30degC. Pratylenhus kumamotoensis reproduced bisexually and the number of total progeny from the inoculated female sharply increased 15-18 days after inoculation (dai) at 30degC, 24-27 dai at 25degC and 40-44 dai at 20degC, indicating onset of oviposition by next generation females. These results indicated that P. kumamotoensis is closer to tropical or subtropical plant-parasitic nematodes in thermal requirements rather than to temperate species such as P. penetrans.
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