جستجوی مقالات مرتبط با کلیدواژه « نیکوسولفورون » در نشریات گروه « اقتصاد کشاورزی »

In order to evaluate the efficiency of non-chemical and chemical methods and their simultaneous use to control of weeds (Echinochloa Crus-galli, Amaranthus Retroflexus and Convolvulus Arvensis) in maize, a split plot experiment was conducted in the randomized complete block design in three replications and implemented at Varamin-Iran. The main factor (A) was non-chemical treatments consisted of three levels: AM: Irrigation before sowing (agronomic), AC: cultivator (mechanical) and A0 (without agronomic or mechanical operations). Sub-factor was (H) of chemical treatments include three levels of HFS (Foramsulfuron (at a rate of two liters per hectare, HNS (nicosulfuron at a rate of 1.5 liters per hectare), HA + G (atrazine and Gazaprim) and H0 (manual weeding by hand), respectively. The number of Amaranthus Retroflexus and Convolvulus Arvensis weeds (compared to the control) decreased by about 90% with the irrigation before sowing (Am) or cultivator (AC), and the increase in yield (compared to the control) was about 55-60%. While the non-chemical treatments (agro-mechanical) had no effect on reducing the number of Echinochloa Crus-galli weed. Nicosulfuron herbicide, similar to hand weeding (H0), controlled more than 90% of the Amaranthus Retroflexus and Convolvulus Arvensis weeds, but only 70% of the Amaranthus Retroflexus and Convolvulus Arvensis weeds. There was no significant difference in terms of corn grain yield (8000-8500 kg / ha) between hand weeding (H0) and nicosulforn herbicide (HNS) in plots in with agro-mechanical operations. However, in plots where agro-mechanical operations (A0) were not performed, hand weeding (H0) had 12.5% ​​higher corn grain yield compared to Nicosoluren herbicide application (HNS). Therefore, for Echinochloa Crus-galli, a combination of Irrigation-nicosulfuron and cultivator-nicosulfuron treatments is proposed.

Survey effects of new herbicides on control of weed and ear characteristics of maize, an experimental was carried out as complete randomized block design with three replications in the research station of Islamic Azad University- Arak Branch, Iran in 2012. Three different herbicides were applied after maize emergence, namely Nicosolfuron, Rimsolfuron and (Rimsolfuron +Nicosolfuron) With treatment weeding in compared to twice Weeding and Weedy check treatment in the maize variety Sc-704. Results showed that application of Rimsolfuron +Nicosolfuronat+ Weeding decreased weeds dry weight as compared to Weedy check treatment by 88.96%. Application of Nicosolfuron at rate of 2 liter per ha-1 decrease weeds dry weight as compared to Weedy check treatment by 37.22% that between herbicide treatments had least effects. The maximum of grain yield equal 4514 kg/ ha was obtained from Rimsolfuron +Nicosolfuronat + Weeding.