The field experiments were carried out in Kruszyn Krajeński near Bydgoszcz during the 2005–2006. The influence of drip irrigation on insects oc-cupying of two cultivars of summer squash ‘Danka’ and ‘Sweet Dumpling’ were investigated. On the base of the received results was proved that on the squash ‘Danka’ phytophagous insects significantly more appeard. From phytophagous insects the largest group was Homoptera, and among them Cicadellidae. The signifi-cantly large number of insects were found on the drip irrigated plants (44 pcs x plot-1), in comparison to non-irrigated (34 pcs x plot-1). The Empoasca pteridis Dahlbom., Eupteryx atropunctata Goeze and Macrosteles laevis Ribaut, were represented in total number of all Cicadellidae in 65, 17 and 7%, respectively. Heteroptera was represented by Lygus rugulipennis Popp., Trigonotylus coeles-tialium Kirk. and beneficial Anthocoridae as well as Nabidae. The ‘Sweet Dumpling’ cultivar was also occupying more often by the Ho-moptera. The most abundant insects were Empoasca pteridis Dahlbom (42%), Eupteryx atropunctata Goeze (32%), Macrosteles laevis Ribaut and Psammotettix alienus Dahlbom (10%) of all Cicadellidae. Beneficial and phytophagous Het-eroptera appeared as less abundant. ...
Beneficial and phytophagous insects of winter squash ‘Amazonka’ culti-vated under various fertigation regimes and plastic cover were investigated. The entomological experiments were conducted in 2006 and 2007. The largest group of insects were Homoptera, Heteroptera and Thysanoptera. Number of these in-sects was significantly larger on plants with fertigation conducted once a week. The least of all insects were in combinations with topdressing nitrogen fertiliza-tion and drip irrigation. Homoptera were represented by: Cicadellidae, Delpha-cidae and Aphididae. From Cicadellidae the most abundant was Empoasca pteridis Dahlbom. Macrosteles laevis Ribaut and Eupteryx atropunctata Goeze were significantly less numerous. Beneficial insects appeared as less abundant in comparison to pest insects and were represented by Aelothripidae, Anthocoridae, and Nabidae families. The usage of fertigation and plastic covering in open field cultivation of winter squash ‘Amazonka’, affected on numerous of phytophagous insects such as: Lygus rugulipennis Popp. and Trigonotylus coelestialium Kirk. The two species mentioned above willingly raven on the plants from the black plastic covered plots. The usage of the black plastic covering in open field cultiva-tion of squash, influenced on accumulation of water in the soil, reduced of weed infestation and decreased humidity in plant canopy. ...
