Elham Samadi kalkhoran; Mohammad taghi Alebrahim; Mehdi Mohebodini
Abstract
In order to study the effect of Oxadiargyl (Topstar) reduced dosages efficacy as a postemergence herbicide, on marketable yield, a field experiment factorial was performed besed on randomized complete block design with three replications and potato's cultivar called Agria in the Ardabil Alarog Agriculture ...
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In order to study the effect of Oxadiargyl (Topstar) reduced dosages efficacy as a postemergence herbicide, on marketable yield, a field experiment factorial was performed besed on randomized complete block design with three replications and potato's cultivar called Agria in the Ardabil Alarog Agriculture and Natural Resources Research Station during 2013. Factores were Oxadiargyl dosages with seven levels (0 as weedy, 0.05, 0.1, 0.2, 0.4, 0.6 and 0.8 Lit a.i/ha), and application time of Oxadiargyl at different potato growth stages, in three levels (Potato emergence, Stoloning and Potato tuber bulking) with weed free. Statistical analysis showed that 0.8 Lit a.i/ha Oxadiargyl reduced weed biomass 66.16% and it hadn,t significant with 0.6 Lit a.i/ha. Among application time of Oxadiargyl, potato emergence produced the maximum reduction percentage of weed biomass. The results showed that 0.8 Lit a.i/ha increased percent of medium tuber and total tuber yield 88.21 and 51.59%, respectively and decreased percent of small tuber 45.60 percent. According to the results, maximum percent of large tuber and marketable yield was 0.8 Lit a.i/ha at potato emergence stage.
Mohammad Ali Baghestani Meibodi; Manouchehr Jam nejad; Mahdi Mainbashi Moeini; Faribi Meighani
Volume 12, Issue 2 , November 2010, , Pages 11-23
Abstract
In order to study the effect of environment temperature and GR60 concentration on seed germination and growth of Orobanche aegyptiaca and Orobanche cernua, two experiments were conducted under controlled conditions in Weed Research department of Iranian Research Institute of Plant Protection in 2008. ...
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In order to study the effect of environment temperature and GR60 concentration on seed germination and growth of Orobanche aegyptiaca and Orobanche cernua, two experiments were conducted under controlled conditions in Weed Research department of Iranian Research Institute of Plant Protection in 2008. The first experiment was established as a completely randomized design with factorial arrangement of treatments and five replications. The first factor was GR60 concentration (zero, one, two and five ppm), the second factor was broomrape species (O. aegyptiaca and O. cernua), and the third factor was temperature (10, 20 and 30?C). The second experiment was also conducted with the same statistical design and species, temperature at three levels (15, 20 and 30?C) and host plants at two levels (tomato and tobacco). Results indicated that GR60 stimulated seed germination of both broomrape species. Broomrape germination increased up to 20?C. O. cernua needed less GR60 for maximum germination compared to that of O. aegyptiaca. Stem weight of broomrape species increased by moderate increase in temperature.