【摘要】 烟粉虱危害青萝卜造成其叶脉、表皮及木质部变白(白心)。随着接虫密度的增大,青萝卜叶脉变白株率、外表皮退绿株率和白心率依次增加,单株有虫40头以下时,青萝卜白心率在10%以下。更多还原

【Abstract】 Bemisia tabaci can induce silver appearance in the vein,cuticle,and xylem of green radish.The relationship between feeding population of Bemisia and silver appearance rate is direct ratio: the higher density of bemisia,the higher ration of silver appearance in vein,cuticle,and xylem of green radish.The ration of silver appearance in xylem of green radish was under 10% when the Bemisia density was under 40 on each radish plant?更多还原