Elevated temperatures may dry out the soil, and thus decrease the amount of water available to the wheat. If the wheat does not receive enough water, its yield may be severely decreased. High temperatures can also increase the occurrence of bacterial diseases and fungal growth which have a negative affect on wheat yield. Warmer winter temperatures may increase the number of insects present in wheat fields, too. Warmer temperatures increase the insects' ability to survive the the winter in high-elevation areas.
More insects increase herbivory .
On the other hand, elevated temperatures may benefit yield by increasing the amount of available nutrients. This is possible because high temperatures cause an increase in the rate of decomposition of dead plants and animals. This may lead to more nutrients naturally available to the wheat and ultimately an increased wheat yield. All rights reserved.