Pests
 
Cicadidae Pests main menu
  Sap suckers of the worst kind
 

For several years now the presence of Cicadidae (Hauptidia maroccana) has increased, especially in tomato culture.

 

  Biology
 

The adults of the Cicadidae measure approximately 4-5 mm, are light yellow with greyish or brownish marks and make irregular moves. The nymphs resemble the adults very much, however, are more whitish, have no wings and move around a lot.

The adults, just as the nymphs, live underneath the leaves. The eggs are laid under the epidermis over the entire length of a vein on the underside of the leaf and are as good as invisible to the naked eye. A female Cicadidae can lay up to 50 eggs during her entire adult life. The nymphs hatch after 17 days at a temperature of 18°C or after 10 days provided temperature is 22°C.

Every nymphal stage (there are 5 in total) takes 5 days at a temperature of 22°C or 8 days at 18°C. The nymphs, just as the adults, feed on the sap of a plant (by means of a puncture). The damage caused appears as small round white marks visible on both sides of the leaf. In cases of larger damage, the marks form one big whitish surface, sometimes spread over the entire leaf.

 

 

  Damage
  Like the whitefly and the aphid Cicadidae produce a sticky substance, honeydew. This substance affects the leaves and fruits by enabling a fungus to grow on it. The Cicadidae can develop on cucumber and several ornamentals. The development of this population can be slowed down by removing the infected leaves in time and by pulling out the weeds in and around the greenhouse. However, it will often not be enough.
 

 

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