Downy mildew, caused by Peronospora parasitica Pers. ex Fr., is an important disease of canola that has implications during early seedling establishment. The fungus invades young seedlings and severe infection results in premature defoliation. In worst cases, the systemic infection may even kill the seedlings. Current commercial varieties of canola are very susceptible to downy mildew. Therefor...

Drought is an important environmental constraint limiting the productivity of many crops worldwide. Experiments were conducted to investigate the effects of foliar spray of natural extract (garlic extract) on drought stress in two cultivars of soybean (Glycine max) plants. Drought stress caused significant decrease in growth parameters (shoot and root length, area of leaves, fresh and dry weigh...

A fiel experiments was laid out in agricultural research farm, city Namin, Ardabil province, Iran in 2013. Experiment was conducted in a randomized complete block with seven treatments and three replication. Foliar spray treatments urea solution at a rate of 1, 2 and 3% (in two stages, the first stage a month after transplanting when they had reached 10 cm in height to 20 days after the first s...

A fiel experiments was laid out in agricultural research farm, city Namin, Ardabil province, Iran in 2013. Experiment was conducted in a randomized complete block with seven treatments and three replication. Foliar spray treatments urea solution at a rate of 1, 2 and 3% (in two stages, the first stage a month after transplanting when they had reached 10 cm in height to 20 days after the first s...

this experiment was conducted in order to evaluate the effects of foliar application of ordinary and nano-particles of zinc oxide on the response of corn to salinity. treatments included two corn genotypes (seed mass and sc 704), three spray levels (zinc oxide, nano-sized zinc oxide, and a spray of water treatment) and three salinity levels (0, 75 and 150 mm nacl). shoot dry matter was decrease...

To study the effect of nitrogen fertilizer sources and foliar spray of organic acids on rice crop, In this regard, this test was performed in 2010 and 2011 years at ElGemmeiza Agricultural Research Station, El-Gharbia Governorate located at lat. 30.47, long 31.00 and 14.80 m above the mean sea; the used design was split plot randomized complete block with 3replications. Main plots, two nitrogen...

Effects of doses of gibberellic acid (GA3) were studied on the growth and performance of strawberry cultivar ‘Chandler’. GA3 was applied as foliar spray at three leaf stages @ 50, 75, 100 and 150 ppm. The applied GA3 @ 150 ppm significantly increased the plant height, leaf area index (LAI), crown size and fruit yield. However, this dose of GA3 (150 ppm) significantly decreased the shelf life an...

background and objectives: drought stress is one of the most important environmental factors reducing growth and yield of crops, especially in arid and semiarid regions of the world. during drought stress, nutrient uptake diminishes due to rising of solute concentrations and so increasing of osmotic potential in the root zone. with increasing soil ph, micronutrient uptake decreases more than ot...

The harmful impacts of ozone (O3) on plant development and productivity have been excessively studied. Furthermore, the positive influences its low concentrations still need to be explored further. present study was performed assess impact O3 two sweet pepper hybrids under cold stress. ozonated water utilized for seed soaking or foliar application at 0, 10, 20, 30, 40 ppm. Seed using 1 h compar...