CANOPY TEMPERATURES AND ACCUMULATED DEGREE DAYS ON COTTON PLANTS UNDER WATER DEFICIT

Scanned and spot measured canopy temperatures of cotton and corn

Canopy temperature is a useful indicator of crop water stress and can also be used for making timely irrigation scheduling decisions for center pivot and subsurface drip irrigation systems. However, it is not known how closely the measured canopy temperature from a circular area of the canopy surface compares with a larger continuous area that includes the full canopy width. A study was conduct...

Water stress of sugarbeet as related to leaf and canopy temperatures and to leaf Water content

Water-deficit Stress in Cotton

Water deficit is the major abiotic factor limiting plant growth and crop productivity around the world (Kramer, 1983). Approximately one third of the cultivated area of the world suffers from chronically inadequate supplies of water (Massacci et al., 2008). In all agricultural regions, yields of rain-fed crops are periodically reduced by drought (Kramer, 1983), and the severity of the problem m...

Effect of 1-Methylcyclopropene on the Cotton Flower Under Water-Deficit Stress

Drought is the main abiotic factor limiting more than 70% of the arable land around the world. Ethylene, a plant hormone, has often been observed to increase under environmentally unfavorable conditions, resulting in abscission of leaves and fruiting forms and ultimately in yield reduction. Concerning cotton, however, the effects of water-deficit stress on ethylene production have been uncertai...

Statistical estimation of degree days of mosquito development under fluctuating temperatures in the field.

Degree-days are important parameters for developing predictive models of mosquito populations. Conventional methods of estimation of degree-days are typically applied to observations under constant temperatures in the laboratory. These methods are difficult to apply in the field where temperatures fluctuate. For estimating degree-days of larval developments of mosquitoes in the field, we applie...