• 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

• Caterpillar control with nematodes

  a liquid layer, a dry leaf surface does not stop the nematodes. Depending on climatic conditions, nematodes survive on the leaf surface for many hours

• 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

• 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

• Black leg of seedlings

  damping-off ’). 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

• Nutari

  leaves by hand or with an Air(o)bug Large heaps of carrier material may cause leaf damage, so make sure the material is distributed as a thin, even layer Dosage

• 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

• Flies

  result of larvae feeding on root hairs and tender roots as well as stem and leaf tissue and fruits. The lesions caused by feeding larvae provide invasion

• Tomato looper

  which make them appear skeletonized. The last two instars may eat the entire leaf except for the midrib or other large veins. On tomatoes, the tomato looper