أعداد حشرات المن و نسبة الإصابة بالفيروسات على زراعة البطاطا-البطاطس الموسمية و غير الموسمية بمنطقة سطيف (الشرق الجزائري)‎

الملخص EN

In potato production fields in Setif region, 39 aphid species were recorded.

Only Acyrthosiphon pisum (Harris) was trapped on potato during the growing season.

Amongst the species assessed, five were able to develop on potato, namely, Aphis fabae Scopoli, Aphis gossypii Glover, Aphis nasturtii Kaltenback, Macrosiphum euphorbiae (Thomas) and Myzus persicae (Sulzer).

The total number of winged aphids collected per trap during the growing season was 429.3.

The M.

persicae population have reached 16.9 aphids.

This last species is considered the main vector of potato leafroll virus.

No aphid colony was observed on potato leaves during the main season, and the rate of virus infection did not exceed 6%.

During the off-season, 1036.0 winged aphids were collected per trap with 733.1 insects during the month of November, including 55.0 M.

persicae aphids.

Moreover, during the off-season M.

persicae and A.

fabae colonies were observed on potato leaves.

The high aphid population during the off-season lead to a high rate of virus infection, which reached 28% on November 5.

Key words: Aphids, virus diseases, potato seed, Algeria