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Open access

Branka Popović, Snežana Tanasković and Sonja Gvozdenac

Summary

From the economic perspective, the western corn rootworm (WCR), Diabrotica virgifera sp. virgifera (Col., Chrysomelidae), poses the gravest threat to the field maize production in Serbia. The purpose of this study is to examine the impact of WCR larvae on the morphology of maize characters during a low-level artificial egg infestation. A field experiment involving the Serbian cultivar ‘NS-640’ was carried out in Bečej, Vojvodina Serbia, in 2016. In the experimental field, a total of 96 maize plants were selected, marked and arranged in 48 pairs. Each pair consisted of an infested plant (WCR eggs injected in the root zone) and an uninfested plant (distillate water injected in the root zone). The number of leaves, height and stem diameter of the plants observed were recorded. Root damage and root weight were measured and evaluated at the end of the trail. For the purpose of statistical analysis, the non-parametric Kruskal-Wallis one-way analysis of variance and a correlation matrix were used. The statistical analysis performed indicate a highly significant difference in the number of leaves and plant height between the infested and uninfested maize plants examined in July (the third field observation). During the last field inspection, significant differences were recorded only between the stem diameters of the infested and uninfested maize plants. A negative correlation was found to exist between the root damage and root weight of the plant pairs. There were positive correlations between the stem diameter, plant height and number of leaves of the infested plants, whereas positive correlations were found between the root damage and plant height of the uninfested plants.

Open access

Plamen Zorovski, Vladislav Popov and Tonya Georgieva

Summary

During the 2014-2016 period in Agroecological Center at the Agricultural University - Plovdiv, Bulgaria growth and development of three species of wheat in terms of organic farming had been tracked in order to return the species in the crop rotation, maintenance of biodiversity and receiving of cleaner and healthy products from organic farms. The three species of wheat Triticum monococcum L., Triticum dicoccum Sch, and Triticum spelta L., differ between its rate of growth, development, general and productive tillering. In tillering phase the plants reached 12,3 cm of height for Triticum monococcum L., 15,7 cm for Triticum spelta L. and 19,4 cm for Triticum dicoccum Sch. Triticum monococcum L. and Triticum dicoccum Sch, reached ear formation phase 5 days earlier than Triticum spelta L. The interfacial period of stem elongation - ear formation in them, was about 21 days compared to 25 days for Triticum spelta L.. From ear formation to full maturity inter-phase periods were shorter in Triticum dicoccum Sch., which specifies the species as an early mature (6 days earlier) compared to the other two. After phenophase of stem elongation plants were growing the most intensive and in full ripeness reached a height of 94 cm in Triticum monococcum L., 81,5 cm in Triticum dicoccum Sch. and 82,5 cm in Triticum spelta L.

Open access

Maja Meseldžija, Milica Dudić and Sonja Stipanović

REFERENCES Badalamenti E. & La Mantia T. (2013): Stem-injection of herbicide for control of Ailanthus altissima (Mill.) Swingle: a practical source of power for drilling holes in stems. iForest - Biogeosciences and Forestry , 6(2): 133-136. Bowker D. & Stringer J. (2011): Efficacy of herbicide treatments for controlling residual sprouting of tree-of-heaven. Proceedings of the 17th Central Hardwood Forest Conference, Lexington (KY, US) 5–7 April, 2010. Northern Research Station, USDA Forest Service, pp. 128-133. Eck W.E. & Mcgill D.W. (2006

Open access

Miodrag Dimitrijević, Sofija Petrović, Borislav Banjac, Goran Barać and Velimir Mladenov

Cold War. Pub. Oxford University Press, New York and Oxford, p. 337, 1997. PETROVIĆ S, DIMITRIJEVIĆ M, KRALJEVIĆ-BALALIĆ M, PANKOVIĆ L: Variability and Stability of Stem Height and Harvest Index in Triticum sp. Proceedings of the Research Institute of Field and Vegetable Crops, Novi Sad, Serbia, 42, 237-245, 2006. [ original in Serbian, abctract in English ] PETROVIĆ S, DIMITRIJEVIĆ M, BANJAC B, DIMITRIJEVIĆ A: Stability parameters of nutrients translocation in bread wheat. 46th Croatian and 6th International Symposium on Agriculture. Opatija, 14. – 18

Open access

Zoran S. Ilić, Elazar Fallik, Maja Manojlović, Žarko Kevrešan and Jasna Mastilović

., ABREU, M., SOL, M., GONÇALVES, E.M., SILVA, C.L.M. Postharvest quality of refrigerated tomato fruit ( Solanum lycopersicum , cv. Zinac ) at two maturity stages following heat treatment. Journal of Food Processing and Preservation. 39: 697-707, 2014 PERINI, M.A., SIN, I.N., REYES JARA, A.M., GOMEZ LOBATO, M.E., CIVELLO, P.M., MARTÍNEZ, G.A. : Hot water treatments performed in the base of the broccoli stem reduce postharvest senescence of broccoli ( Brassica oleracea L. var italica ) heads stored at 20°C. LWT - Food Science and Technology. 77, 314-322, 2017