Insecta, Homoptera, Aphididae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Firstly introduced into Europe in 1917, this species is very polyphagous and cosmopolitan. Infestations occur commonly on potato, beet, cabbage, glasshouse plants (lettuce, endive, red pepper, aubergine, cucumber), wild plants and flowers: silver ragwort (Senecio), Chrysanthemum, dahlia, carnation and pink (Dianthus), etc.
Aphid colonies increase rapidly from early spring onwards and can double in less than 3 days, the number of nymphs produced by the virginoparae varying between 30 to 50.
- Aphids are usually present on leaves and flower peduncles.
- The potato aphid occurs in 2 forms: a green and a pink one.
Green forms (*) typically infest lower leaves and older seedlings of potato while pink forms are distributed all over the foliage (*) .
A heteroecious species including numerous anholocyclic forms. Winter eggs are sometimes present on rose and related rosaceous hosts, but most populations survive parthenogenetically, overwintering on potato eyes or in heated or unheated glasshouses.
Aphid feeding slow down the growth of seedlings and lead to a decrease in yield.
However, the most dangerous activity of this aphid is the transmission of phytopathogenic viruses, especially the potato virus Y (PYV) and the beet yellows virus (BYV).
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.