• Early blight

  then turn into dark brown angular lesions with a yellow halo restricted by leaf veins. Lesions can easily rupture. Other symptoms are brown lesions on stem

• Wheat bunt

  tritici and Triticum laevis . Since Triticum controversa mostly attacks the 2-3 leaf stage, this is less effective for this fungus Prevent plant diseases by

• Verticillium wilt

  occur on the stem. In tomato, sometimes V-shaped lesions are formed on the leaf, between the veins. 'Early dying' disease of potato only occurs as premature

• Fusarium head blight or scab

  symptoms Fusarium fungi cause vascular wilt, root rot, foot and stem rot, leaf lesions, fruit rot, fusarium head blight in cereals, such as wheat (fusarium

• Onion thrips

  can shrivel. Onion thrips (Thrips tabaci) is found mostly along the main leaf veins, with most damage evident where these veins join. Fruit damage, for

• Apple rosy aphid

  Attacked shoots are stunted and twisted. Heavy attack can lead to premature leaf fall and death of shoots. Fruits from infested trusses are small and malformed

• Phytophthora blight

  zoospores produced in the sporangia. For germination on above-ground plant parts, leaf wetness is required. Dispersal is by wind and rain causes the pathogen to

• Silver-Y moth

  causing typical caterpillar damage. Feeding damage includes feeding on the leaf epidermis and on the petiole, skeletonized leaves, accumulation of frass

• Glasshouse potato aphid

  in the crop can cause deformed growth above with lumpy leaves and curled leaf margins. The immediate effects of piercing by the aphids are visible in lower

• Damping-off

  f disease. In slightly older plants, the leaves lose their turgor or the leaf tips turn yellow, for example in flower bulbs. At first, the plants recover