In recent years the use of 2,4-dichlorophenoxyacetic acid (2,4-D) as a selective herbicide has become increasingly important in the production of small grains and corn. Yield reductions due to direct injury to the crops are usually small. However, severe yield reductions have occurred occasionally when 2,4-D was used at herbicidal dosages during certain stages of crop growth. Corn plants spraye...

Lodging-resistant rice (Oryza sativa) cultivars usually show slow grain filling when nitrogen is applied in large amounts. This study investigated the possibility that a hormonal change may mediate the effect of water deficit that enhances whole plant senescence and speeds up grain filling. Two rice cultivars showing high lodging resistance and slow grain filling were field grown and applied wi...

High nutrient availability and defoliation generally reduce ectomycorrhizal colonization levels in trees, but it is not known how this affects the functional aspects of mycorrhizal symbiosis. It was therefore investigated whether (1) defoliation or increasing substrate N availability reduce C allocation from the plant to the fungus and N allocation from the fungus to the plant (symbiotic resour...

Background: Cercospora leaf spot of mungbean [Vigna radiata (L.)] caused by canescens. It has become a severe menace to the growers Rajasthan in India and general causes economic losses under changing climatic scenario. Depending upon temperature humidity, it spreads rapidly susceptible varieties causing premature defoliation reduction size pods grains. In this study management was taken throug...

Despite the predominant role of bud banks in the regeneration of clonal macrophyte populations, few studies have examined the way in which clonal macrophytes adjust the demographic features of bud banks to regulate population dynamics in response to defoliation in wetlands. We investigated the density and composition of bud banks under repeated defoliation in the wetland sedge Carex brevicuspis...

Purple loosestrife, Lythrum salicaria, has invaded North American wetlands over the last 200 years. A biological control project was started in British Columbia, Canada, in 1993 with the introduction of Galerucella calmariensis, a leaf-feeding beetle of European origin. To evaluate the success of the biological control project in the Lower Mainland of British Columbia, we monitored the defoliat...

The high level of copper (Cu) accumulation in the soil, risk surface water contamination, and potential public health problems due to Cu entering food chain have raised concerns on use compounds agriculture, including olive growing. As a consequence, there is worldwide regulatory pressure agricultural systems limit compounds. Hence, field trial was carried out evaluate effectiveness low contain...

to evaluate the effect of biofertilizers on yield and yield components of a soybean cultivar (m9) under water stress condition, a study was carried out in a split plot randomized complete block design with three replications at research station of bu ali sina university in 2012. the main plots included three levels of irrigation after 50, 100 and 150 mm evaporation from a pan and subplots inclu...

Three plant species from each of three grassland ecosystems were grown under elevated (700 mL/m3) and ambient (350 mL/m3) CO2 and were defoliated or left undefoliated to test whether species response to elevated CO2 and grazing is related to evolutionary grazing history or to mode of photosynthesis. The three ecosystems represented a tropical grassland dominated by C4 species (the Serengeti of ...