Effects of foliar application of methanol on agronomic and morph physiological traits of sunflower (Helianthus annuus L.) under cut irrigation stress

To study the effects of spray Methanol on farming and morphological characteristics under water deficit stress on oil sun flower was conducted on RCBD with three replications at research station of Islamic Azad University Varamin branch, in 2012. Experimental factors were water deficit stress as main plots (normal irrigation, drought stress in flowering phase and drought stress in filling of grain phase) and methanol ( lack of methanol, 10% methanol, 20% methanol and 30% methanol) as sub plots. Times of spray methanol were when plant had 8 leafs, 15 days after and 15 days after. Results showed that drought stress decreased1000 kernel weight, Head diameter, grain yield, biological yield but it increased EC. Also spray methanol increased grain yield, biological yield, 1000 kernel weight, Head diameter but it decreased EC. Analysis of variance showed that interaction drought stress and spray methanol significantly affected on investigated traits.Maximum grain yield was obtained from normal irrigation and spray methanol that was 3205/667 and minimum grain yield was obtained from drought stress in filling of grain phase and lack of methanol that was 1648/371.In general, sun flower is sensitive in filling of grain phase and methanol decrease drought stress effects.