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// // // Potato aphid (Macrosiphum euphorbiae)

Potato aphid (Macrosiphum euphorbiae)

Macrosiphum euphorbiae

A pest widely spread in Europe, Central Asia and North America, capable of feeding on more than 200 types of plants.



The insect damages vegetables (tomato, pepper, cucumber, potato), ornamentals (rose) and technical crops in a closed and open ground. It is a vector of more than 50 kinds of viral diseases of plants. The pest prefers the underside of the leaf and the young shoots. On the cucumber in the greenhouse colonizes the middle and lower tier of the plant. Vital activity of the pest leads to the appearance of chlorotic spots (tomato) or a mesh (cucumber) on the leaves of the host plant. Pest toxins cause twisting of leaves and shoots, which eventually dry up. Isolated aphids surplus sugar during accumulation can cause the development of soot fungus on culture. Sooty smudge, covering the plant, prevents respiration and photosynthesis, which oppresses the affected crop.

How to recognize

The wingless female has an oval body, pointed at the posterior end, about 2.7 mm long. Wingless aphids are mostly green, in some cases pink. On the back side of the abdomen, the aphid has a long dark green band. The winged female has large dimensions - about 3.4 mm. It is also green, but without a strip on the abdomen. Head and thoracic region dark.

Колония Большой картофельной тли фото
Colony of potato aphid


Life cycle

Like most of the greenhouse pests of the aphis family, the pest refers to incompletely cyclic species and reproduce in parthenogenetic way. In open ground, the pest cycle includes alternation of winged and wingless generations and migration from one crop to another with the participation of wild and decorative varieties of roses, as a second host plant. The insect begins to infect crops at a temperature above 12-13°C, and the optimal temperature is 21-26°C, humidity of 60-80%. The development of the pest population slows down at high temperatures (above 30°C).

Biological control

The Afidiidae of the genus Ргаоn are the natural enemies of the potato aphid. These entomophages move into the greenhouse from the outside. Ordinary lacewings can also be used to control pests, but the effectiveness of its use is not very high.