TY - JOUR N2 - The intensity of Arion lusitanicus occurrence and the damage degree of 31 crop species have been estimated. It has been found that the slug damaged lettuce and cabbage plants very heavily (Lactuca sativa L. var. capitata L., Brassica oleracea L. var. capitata L. f. alba) and many species of other vegetables (Cucumis sativus L., Phaseolus vulgaris L., Raphanus sativus L. subvar. radicula Pers.). Plant damages in the edge strips were also observed on rape and barley plantations attacked by this slug. The moving activity of particular individuals of Arion lusitanicus was varying. Planning of the experiments in a nested block design has made it possible to statistically determine tendencies of the slug movement. It was observed that when some individuals remained at the point where they were initially placed, others, 2 hours after, moved over 7 m away. The mean weighed length of pathway covered by a single individual and the mean movement rate of one were estimated for each of 9 observation dates. It has been found that slugs penetrating the site surface under observation displayed their tendencies to move towards more moist places and towards food sources. L1 - http://journals.pan.pl/Content/118684/PDF-MASTER/331-339_Remarks%20on%20slug.pdf L2 - http://journals.pan.pl/Content/118684 PY - 2004 IS - No 4 EP - 339 KW - Arion lusitanicus KW - slug KW - occurrence KW - cultured plants KW - harmfulness KW - movingactivity KW - nested block design A1 - Kozłowska, Maria A1 - Kozłowski, Jan PB - Committee of Plant Protection PAS PB - Institute of Plant Protection – National Research Institute VL - vol. 44 DA - 17.11.2004 T1 - Remarks on slug occurrence, harmfulness and activity connected with penetration of ground SP - 331 UR - http://journals.pan.pl/dlibra/publication/edition/118684 T2 - Journal of Plant Protection Research ER -