PROBLEM TO BE SOLVED: To provide a nonpathogenic bacterial strain exhibiting stable plant disease-controlling effects even in an actual crop-producing site, also exhibiting effects except the plant disease control, and safely usable as a microbial pesticide and the like, and to provide a new plant disease-controlling agent and the like using the strain.SOLUTION: There are provided an agent for controlling bacterial plant disease such as an agent for controlling black rot of Cruciferae, an agent for controlling bacterial spot of Solanaceae, an agent for controlling bacterial spot of lettuce, an agent for controlling bacterial shot hole of peach and an agent for controlling cankar of citrus fruits, a pest controller such as agents for controlling aphids and/or spider mites, a plant growth accelerator such as a promoter for promoting seed germination of goosefoot family plants, and the like, containing one or more microbial cells selected from two strains of Xanthomonas sp. 11-100-01 strain (NITE P-1243) and Xanthomonas sp. 11-110-01 strain (NITE P-1244) and/or a cultured product of the microbial cells as active ingredients.COPYRIGHT: (C)2014,JPO&INPIT【課題】実際の作物生産現場において安定的な植物病害防除効果を発揮し、植物病害防除以外の効果も発揮する、生物農薬等として安全に使用可能な非病原性菌株、及び、当該菌株を用いた新規な植物病害防除剤等を提供する。【解決手段】キサントモナス属細菌(Xanthomonas sp.)11-100-01株(NITE P-1243)、及び、キサントモナス属細菌(Xanthomonas sp.)11-110-01株(NITE P-1244)の2菌株より選ばれる1以上の菌体及び/又は菌体の培養物を有効成分とすることで、アブラナ科黒腐病防除剤、ナス科斑点細菌病防除剤、レタス斑点細菌病防除剤、モモせん孔細菌病防除剤、カンキツかいよう病防除剤等の細菌性植物病害防除剤、アブラムシ類及び/又はハダニ類防除剤等の害虫防除剤、アカザ科作物種子発芽促進剤等の植物生長調節剤などを提供できる。【選択図】なし
