عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Two slug species (Parmacella ibera and Agriolimax agresteris) from Parmacelidae and Limacidae families were found dominant injuries slugs in nursery and field conditions during 2001-2003. Different methods of control under field condition in Grakheil station of Sari vicinity studied. The experiment conducted in complete randomized block design with eight treatments and four replications. Each replicate consist of the three meters in length and 50 cm in width and lettuce plant to plant spacing of 25 cm. In total 36 lettuce plants cultivated in each replicate. Means were compared using Duncan’s Multiple Range Test (P? 0.05). The results indicated that maximum damages according leave injuries and minimum lettuce yield obtained for ploughing treatment, which 27.3 percent damages with lettuce yield 29.1 ton per hectare. Min. damages with Max. Yield found with Metaldehyde, Methiocarb and Iron phosphate treatments, with two percent and nine percent damages and lettuce yield 39.3, 39.1 and 36.2 ton per hectare, respectively. Metaldehyde and Methiocarb were the best treatments for control of slugs. Among the various control methods, the percentage of loses at the beginning of the injury was lowest for Methaldehyde (4.3 percent) and highest for the thick rough rope (15.5 percent).