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番茄嫩茎异常开裂是番茄保护地栽培过程中经常发生的现象,生产上习惯称为“窗缝”或“眼镜”。如果防治不及时,将对产量造成直接影响。一、症状表现。番茄植株在第三和第四个花絮附近的主茎节间处发生缩短变粗甚至开裂。这种现象主要危害番茄顶端生长点以下8-10厘米处的嫩茎部位,嫩茎受害处初为针刺状小孔并且茎部逐渐由圆形变为扁圆状,继而由针孔处开裂并不断变大,最后形成蚕豆粒大小的“8”字型的病变开裂成为穿孔,仅有两边紧靠表皮的极少部分组织相连。受害植株穿孔部位嫩茎横截面输导组织及髓变
Exceptional cracking of tomato tender stems is a common phenomenon in the cultivation of tomato. It is conventionally called “window slit” or “spectacle” in production. If control is not timely, it will have a direct impact on production. First, the symptoms. Tomato plants shorten and thicken or even crack in the internode nodes near the third and fourth trivia. This phenomenon mainly endanger the top of the growing point of tomato sprout at the 8-10 cm at the tender stem damage at the beginning of acupuncture-like holes and the stem gradually from round to oblate, and then cracked by the pinhole And continue to grow larger, finally forming the size of the beans “8 ” shaped lesions cracking into perforation, only a very small part of the organization close to the epidermis on both sides. Injured plant perforation part of the tender stem cross-section of the tissue and marrow transmutation