معرفی مهم‌ترین لیسک‌های آفت کاهو در مزارع استان مازندران

Slugs are one of the important pests of leafy vegetable fields (lettuce), which every year by feeding on leaves, seeds, roots (quantity loss) and also by causing shredding and scrapping (quality loss) and contamination of the product by feces and mucus, while reducing the quality of the product, cause a lot of economic damage. In the north of the country, due to favorable weather conditions, one of the main concerns of the farmers in the fields and especially the lettuce nursery is the presence of various types of slugs, which cause damage and increase the use of slug killers.
Identifying and distinguishing species from each other is the first step in the prevention and successful management of field slugs. Therefore, it is very necessary to know the types of field slugs, how to cause damage and the conditions and time of their possible outbreak, in order to minimize the damage of these pests and maintain the safety of the consumer's food and the environment.
In this research, the identification of different species of slugs in the lettuce fields, which were collected from the bushes, soil, and also the existing weeds in the fields of Amol, Babol, Ghaemshahr, Behshahr, Dashte Naz, and Neka were investigated.
A total of seven slug species belonging to six genera from five families were identified based on their morphometric characteristics (shape, size, position of the breathing hole, dorsal median line, mucus and its color, body size, radula, size, shape and number of eggs in egg clutches, kidney line, and male and female reproductive system, prostate diverticula). The species Arion vulgaris (Moquin-Tandon, 1855) is a new record. In this study, Agriolimax agrestis and Durisa ibera species had the highest density and damage to lettuce fields in terms of population.