Eckhardt L G, Jones J P, Klepzig K D
Former Graduate Student.
Professor, Department of Plant Pathology and Crop Physiology, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge 70803.
Plant Dis. 2004 Nov;88(11):1174-1178. doi: 10.1094/PDIS.2004.88.11.1174.
Freshly lifted seedlings and 21-year-old trees of loblolly pine were wound-inoculated with Leptographium species recovered from the soil and/or roots of trees with loblolly decline symptoms in central Alabama. Seedlings inoculated with L. procerum in the greenhouse produced significantly fewer root initials and a smaller root mass than control seedlings. Vertical lesions produced in seedlings by L. serpens and L. terebrantis were significantly longer than in controls. Lesions produced in mature trees by L. serpens and L. lundbergii were significantly longer than in controls. Of the fungi tested, L. serpens, L. terebrantis, and L. lundbergii were the most aggressive and may pose the greatest threat to loblolly pines.
从阿拉巴马州中部有火炬松衰退症状的树木土壤和/或根部分离得到的长喙壳属菌种，对新移栽的火炬松幼苗和21年生的树木进行创伤接种。在温室中接种长喙壳菌的幼苗比对照幼苗产生的根原基明显更少，根系质量更小。由蛇形长喙壳菌和穿孔长喙壳菌在幼苗上产生的垂直病斑明显比对照更长。由蛇形长喙壳菌和伦德伯格长喙壳菌在成年树上产生的病斑明显比对照更长。在所测试的真菌中，蛇形长喙壳菌、穿孔长喙壳菌和伦德伯格长喙壳菌最具侵染性，可能对火炬松构成最大威胁。
