论文部分内容阅读
1.棉黄萎病病原菌,经鉴定后,采用 Verticillium albo-atrum Reinke et Berthold学名。2.最适本病原菌生育的培养基,以改良 Czepek’s 组合和马铃薯培养基为最好,在这两种培养基上菌丝生长旺盛,经过4—5天后都能生很多分生孢子,并渐生成小菌核。3.本病原菌的发育温度以17°—28℃较好、其中尤以25℃最好。孢子发芽温度以15°—20℃篇最好、在1%葡萄糖液中发芽最好。但在灭菌水中发芽亦好,对营养的要求并不太高。4.本病原菌自苗期(具四真药)开始直至后期,皆能侵入棉株内部,其中尤以用孢子悬浮液于棉根附近接种的办法,得知在开花期至结铃期皆能显现较高的发病率、根据实验记载,在棉花生育期中,接种后一般8—16天左右即能现出病征,此比前人记载期限较早。
1. Verticillium wilt pathogen, after identification, using Verticillium albo-atrum Reinke et Berthold scientific name. 2. The best medium for the growth of the pathogen was modified Czepek’s combination and potato medium best, in both medium mycelial growth vigorous, after 4-5 days can produce a lot of conidia, and gradually formed Small bacteria nuclear. 3. The development of the pathogen temperature to 17 ° -28 ° C better, especially at 25 ° C is best. Spore germination temperature of 15 ° -20 ℃ article best, best in 1% glucose solution germination. However, germination in the sterilization of water is also good, the nutritional requirements are not too high. 4. The pathogen from the seedling stage (with four real medicine) until the late, all can invade the cotton plant internal, especially with spore suspension inoculation near the roots of cotton, that during flowering to the end of the bell period can Show a higher incidence, according to experimental records, during the growing period of cotton, usually 8-16 days after inoculation that can show signs of disease, earlier than the previous record of the period.