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Therefore, Alternaria is the main pathogen of cotton leaf spot. 2. Pathogenicity test of the above-mentioned 26 strains showed that they are the cotton leaf spot pathogens as the eumycetes isolated from the Invasived plants are the same with the pathogenetic strains.

根据科赫氏法则从接种发病植株叶片上分离病菌，其形态特征与从自然发病植株上分离的相同，证实这些菌株就是棉花叶斑病的致病菌，其中链格孢属是棉花叶斑病的主要致病菌属 3。

Euproctis pseudoconspersa Strand nuclear polyhedrosis virus, a highly infectious and selective pathogen of Euproctis pseudoconspersa Strand which is an effective control measure by bringing polyhedrosis in tea garden.

茶毛虫病毒是茶毛虫高效专一性病原物，能在田间诱发茶毛虫病毒病的流行，是控制茶毛虫的有效手段。

This project is designed for the proper condition of the villages and towns , used to eliminate the sewage of living , waste water of production and the excrescent surface water. It can reduced spread of pathogen and environment pollution , in order to keep sanitation of the habitation.

项目简介：该项目是针对农村乡镇特有的生产和生活环境所设计，用于排除农村乡镇居民生活污水和生产中的各种废水、多余的地面水的工程，可有效减少病菌传播和对环境的污染，以保持生活环境的卫生。

As a facultatively intracellular pathogen,NTHI has the potential to penetrate and survive in alveolar epithelial cells.

BEAS-2B细胞在NTHI刺激后IL-8分泌增加，可部分被两种MAPK抑制剂所抑制。

Microscopic examination showed the conidiophores were fasciculate and brown, and that the basal cell was enlarged and hemispheric. Well-developed conidia were long-obclavate, obtuse at both ends, with five to eight transverse septa, which indicated that the pathogen was Bipolaris setaria.

形态观察结果表明，该病原菌分生孢子梗丛生，褐色，基细胞膨大呈半球形，成熟的分生孢子长椭圆形，两端钝圆，具5～8个隔膜，表明其为狗尾草离孺孢。

Study of kinetic antibacterial activities of QJ2 against pathogen W-1 was tested by viable bacteria counts and absorbency at 600nm: 106～ 107 cfu/mL cells of W-1 began to decrease in 15 min after mixing with CFS(cell free-supernatant) of QJ2; the bacterial counts decreased to a minimum at 4h, and the numbers of bacteria began to increase after 6h. The cells of QJ2 did not show any sensitivity to its inhibitory substances in CFS. The size of active molecule in the CFS of QJ2 was smaller than 8000 Da by measuring the inhibitory activities of the fluid inside and outside the dialysis cellulose tubing. QJ2 was identified as Flavobacterium ordaratum by traditional morphological and biochemical method and API-20 identification system.

并对拮抗菌QJ2的拮抗作用进行了研究，结果为：QJ2有广泛的弧菌抗菌谱，对37株弧菌的抗菌阳性率达到89.2%(33/37)；用活菌平板计数法和O.D.600nm研究了QJ2培养物的去细胞上清液与病原菌W-1的作用动力学，15min时W-1的细菌数便开始减少，4h时细菌数最少，6h后开始增加，而对照组的细菌数呈逐渐上升趋势；QJ2对自身的拮抗物质不敏感；QJ2抗性物质的分子量不大于8000Da；经常规生理生化方法和API-20细菌快速鉴定系统鉴定，QJ2为气味黄杆菌。

The germfree ferment filtrate could inhibit hyphal growth and spore germination of pathogen.

无菌发酵液在一定程度上抑制菌丝生长和孢子萌发。

The fungicidal activity of methanol extract was higher than that of ethylacetate extract. The bioassay showed that the methanol extracts of strain As fermentation products had certain degree fungicidical activity against Botrytis cinerea, Alternaria longipes, Glomerella cingulata, Curvulavia lunata, Gibberella zeae, Valsa malt under the concentration of 4000μg/mL, the inhibiting ratio against pathogen growth was ranging from 62.9%~85.1%; The results of the inhibition of spore germination indicated that the fermentation products exhibited obvious inhibition rate against Alternaria longipes, the EC50 values was 62.5328μg/mL; The bioassay showed that the methanol extracts of strain As fermentation products had certain degree fungicidical activity against Bacillus cereus , Bacillus subtilis.

其中甲醇提取物的抑菌活性较乙酸乙酯好，在4000μg/mL浓度下对番茄灰霉病菌、烟草赤星病菌、苹果炭疽病菌、玉米弯孢叫斑病菌、小麦赤霉病菌、苹果腐烂病菌6种植物病原真菌均有抑制作用，抑制率在62.9%~85.1%；抑制孢子萌发试验表明：菌丝体甲醇提取物对烟草赤星病菌的毒力较好，其EC50仅为62.5328μg/mL；抑制细菌活性表明菌丝体甲醇提取物对蜡状芽孢杆菌和枯草芽孢杆菌有一定的抑制作用，而对大肠杆菌无明显的抑制作用。

Results 546 cases were pathogen-positive,accounting for 71.75%of the total test.124 cases of bacterial infection accounted for 22.71%,;340 cases of mycoplasma infection accounted for62.27%;chlamydia infection in 28 cases accounted for 5.13%;52 cases of gonococcal infection accounted for 9.52%,2 cases of fungal infections accounted for 0.37%,mixed infections accounted for 30 cases of 5.49%.

结果 546例病原体阳性，占检测总数的71.75%。其中细菌感染患者124例占22.71%，支原体感染340例占62.27%，衣原体感染28例占5.13%，淋球菌感染52例占9.52%，真菌感染2例占0.37%、混合感染30例占5.49%。

The potential use for every pathogen in biological control are aluated and the feasibility of biological control of weed with plant pathogens is discussed from the view of ecological epithytology, and it is advanced that Helminthosporium nodulosum is a very hopeful biological fungus.

对每种病原菌在杂草生防上的应用前景给予了评价并从植病流行的生态学观点探讨了利用杂草植物病原菌开展杂草生防的可行性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。