The sprinkling irrigation and varied nitrogen fertilisation of millet cv. Gierczyckie on insects with the hemipteroidal mouthpart occurrence were inves-tigated. The entomological experiments were conducted in 2005 and 2006 in Kruszyn Krajeński near Bydgoszcz. The largest group of insects were Thysanoptera and Hemiptera. When we used the middle rate of nitrogen fertilization, Thysanoptera was significantly less numerous. They preffered the irrigation plants. From Thysanoptera the most ab-undant were Phlaeothripidae. Number of Hemiptera was significantly less than Thysanoptera. When the high rate of nitrogen fertilization was used, the numer of Hemiptera was high, too. They were represented by Cicadellidae, Miridae, Aphi-didae and Delphacidae families. Psammotettix alienus Dahlbom. was the most numerous insects from Cicadellidae. The numbers of Macrosteles laevis Ri-baut and Empoasca pteridis Dahlbom was lower. The most frequently caught of Aphididae were the following insects: Sitobion avenae (F.) H.R.L. and Rhopalo-siphum padi L. The usage of irrigation and varied nitrogen fertilization in millet cultivation, affected on numerous of phytophagous insects such as: Lygus ruguli-pennis Popp. and Trigonotylus coelestialium Kirk. First of theirs preffered irri-gation plants with higher rate of nitrogen fertilization. ...
The field experiments were carried out in two consecutive years (2005-2006) at Kruszyn Krajeński near Bydgoszcz. The aim of the study was the influence of different systems of irrigation in asparagus hybrids cultivation on the very light soil on the occurrence of asparagus beetles. The experiments were conducted in a randomized block design of a two-factorial system with four replications. The first tested factor was irrigation in three following variants: O - non-irrigated plots (control), K - drip-irrigated plots and M - micro-irrigated plots. The second factor was associated with two asparagus hybrids (called by producer): Ap, Gr and one cultivar ‘Schwetzinger Meisterschuss'. The number of adults and larvae of both asparagus beetles was observed on every single plot area; three times during the vegetation period from July to August (beginning from the first decade of July and continuing every third week). The harvest plot area was 14.5 m2 (23 plants x 35 cm x 180 cm). Generally, the adults and larvae of twelve-spotted asparagus beetles were more numerous than common asparagus beetles on aspa-ragus hybrids plants: Ap, Gr and ‘Schwetzinger Meisterschuss'. Microirrigation applied on asparagus hybrids wasn't related with these two asparagus beetles did not susceptible to. Much the ...
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. ...
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. ...
