الوذمة
All plants can be affected by oedema
Formation of numerous small, water-soaked blisters appear mainly along the veins of the undersides of leaves. These blisters will erupt forming brown, corky growths. In time, the leaves may turn yellow and fall off.
In greenhouses, oedema formation can take place within hours.
This disorder occurs mainly during a sudden change of climate when humidity goes up rapidly and temperatures drop quickly. Such a change within a short period of time will result in plants taking up more water than their leaves can transpire. The outcome will be an excess of watery fluid accumulating in the plant tissues.
ينبغي اتخاذ الإجراءات التي من شأنها خفض مستويات الرطوبة مثل الخفض المؤقت لكمية مياه الري. أما في الهياكل المغلقة، فينبغي تحسين حركة الهواء وذلك لتقوية أوراق النباتات الجافة وتقصير مدة فترات الترطيب من خلال إيجاد مناطق مهوية تحتوي على ستائر شبكية.
*Names marked in red are considered to be highly poisonous to beneficial insects.
*Names marked in green are considered to be organic and IPM (integrated pest management) compatible.
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