Tsror Lahkim Leah, Erlich Orly, Hazanovsky Marina
Department of Plant Pathology, Agricultural Research Organization, Gilat Experiment Station, M.P. Negev 85280, ISRAEL.
Plant Dis. 1999 Jun;83(6):561-565. doi: 10.1094/PDIS.1999.83.6.561.
The response of five potato cultivars to Colletotrichum coccodes was tested in artificially inoculated fields for three consecutive spring and autumn seasons during 1994 to 1996. Significant yield reductions (22 to 30%) were observed in all tested cultivars. Results varied between years, but yield losses were more severe in autumn than in spring. Stem infections of plants were observed 90 days after planting on the surface of the stem and in vascular tissue. C. coccodes inoculation also resulted in reduction of the quality of daughter tubers. Cultivars Cara and Nicola were found to be less susceptible to tuber infection than Alpha, Desiree, and Agria. The incidence of diseased daughter tubers was higher when the soil was infested than when the foliage was inoculated. C. coccodes contamination of dry stems at harvest (in inoculated plots) was relatively high in all cultivars, with no difference between inoculation methods. Thus, C. coccodes infection not only affects potato yield and the quality of potatoes for seed and consumption, but also contaminates soil and serves as an important source of inoculum for future potato crops.
1994年至1996年期间，在人工接种的田地里连续三个春秋季节对五个马铃薯品种对球炭疽菌的反应进行了测试。在所有测试品种中均观察到显著的产量下降（22%至30%）。结果因年份而异，但秋季的产量损失比春季更严重。种植90天后，在茎表面和维管组织中观察到植株的茎部感染。接种球炭疽菌还导致子块茎质量下降。发现品种卡拉和尼古拉比阿尔法、德西蕾和阿格里亚更不易受到块茎感染。与叶片接种相比，土壤受侵染时染病子块茎的发生率更高。收获时（在接种地块）所有品种干茎的球炭疽菌污染率都相对较高，接种方法之间没有差异。因此，球炭疽菌感染不仅影响马铃薯产量以及种用和食用马铃薯的质量，还污染土壤，并成为未来马铃薯作物的重要接种源。
