Abstract: The present invention discloses apparatus [100] for the prevention of infestations inside a volume of interest (VOI) caused by pathogens. The apparatus comprising a first vent [110] supplying a fluid into said VOI; a chamber [140] supplying a fluid to said first vent; a second vent [120] supplying a fluid into said chamber; and, a radiation emitter [130] emitting radiation into said chamber hence disabling said pathogens. The invention also presents a method of preventing of infestations inside a volume of interest caused by pathogens. This method comprising steps of supplying fluid into said volume of interest through a first vent; supplying fluid to said first vent through a chamber; supplying fluid into said chamber through a second vent; and, emitting an effective dosage of radiation into said chamber and hence disabling said pathogens. The invention further teaches a method for the prevention of infestations caused by pathogens inside a volume of interest.

Abstract: Improved protection of plants and their crops is achieved by growing the plant under a construction having a roof with at least a substantial portion being made of a net of a mesh size allowing adequate ventilation. The net is made of a transparent or translucent polymeric material having incorporated therein a UV-light absorber.

Abstract: Improved protection of plants and their crops is achieved by growing the plant under a construction having a roof with at least a substantial portion being made of a net of a mesh size allowing adequate ventilation. The net is made of a transparent or translucent polymeric material having incorporated therein a UV-light absorber.

Abstract: There is provided a netting produced from polymeric fibers, for use in fences for plant protection preventing invasion for insect pests, which netting has rectangular openings of from 0.25 mm to 0.35 mm in one dimension, and from 0.4 mm to 1.0 mm in the other dimension, with an open area of at least 40 percent of the area of the netting, the fibers having a diameter of about 0.2 mm to about 0.35 mm. The invention further relates to a method of crop protection, preferably against Bemisis Tabaci, where plots of land on which a crop is grown are surrounded by a netting as defined above. Also other insect pests are prevented from passing through such netting and from entering such cultivated plots.