Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/91693
Type of publication: Straipsnis nerecenzuojamoje Lietuvos konferencijos medžiagoje / Article in non-peer-reviewed Lithuanian conference proceedings (P2c)
Field of Science: Agronomija / Agronomy (A001)
Author(s): Klusavičius, Edvinas
Contributor(s): Butkevičienė, Lina Marija
Title: Sėjos laiko įtaka kenkėjų paplitimui vasarinių rapsų pasėlyje
Other Title: The impact of spring rape sowing date on the prevalence of pests in changing climate
Is part of: Jaunasis mokslininkas 2018 [elektroninis išteklius] : studentų mokslinės konferencijos pranešimų rinkinys, 2018 m. balandžio 19 d. / Aleksandro Stulginskio universitetas. Agronomijos fakultetas. Akademija, 2018
Extent: p. 14-17
Date: 2018
Abstract: Field experiment was completed at Experimental Station of Aleksandras Stulginskis University in 2017. Sowing time had a significant influence on the density of rapeseed crops; the densest rapeseed crops were present during these sowings: from 5 of May until 9 of June, but did not differ substantially. Although substantially on average 39.3% higher compared to previous sowings. Sowing time had a significant influence on the pervasion of pests, the highest prevalence of flea-beetles of crucials was observed in first sowing crops (21/04 and 28/04). In the later sowings, (from 5 of May until 2 of June 2) there were done less damage and they did not differ substantially. Last sowing of rapeseed (on 9 of June) has almost no damage observed. There is a strong correlation between the number of flea-beetles of crucials, and the intensity and crop density of seminal leaves affected by flea-beetles after 3 days after the germination: r = -0.82; P≤0.05; r = -0.89; P≤0,01. With delays in time of sowing, the pests and their damage done decreased, and rapeseed germination has improved. The same relationships were determined after 7 days after the rapeseed germination: r = -0.81; P≤0.05; r = -0.88; P≤0,01. The highest pervasion of rape beetle was determined in the crop on 2 of June, substantially on average 3.9 times higher than in previous sowings and 2.9 times higher in sowing one week later. . The highest yield of summer rapeseed was detected when they were sown on 26 of May, but their productivity was not significantly different if they would be sown from 21 of April to 12 of May. If the sowing is delayed until June, their productivity was dropped significantly compared to those sown in April and during all May on average 41.8%
Internet: http://af.asu.lt/wp-content/uploads/sites/3/2018/04/AF-straipsniu-rinkinys-2018_taisyt.pdf
http://af.asu.lt/wp-content/uploads/sites/3/2018/04/AF-straipsniu-rinkinys-2018_taisyt.pdf
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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