Above normal temperatures and little to no rain have left portions of Indiana facing very dry conditions. Early-planted corn and soybean crops as well as non-irrigated vegetables are showing symptoms of drought stress that could impact yields as the season progresses. Dry weather may favor some insect pests (e.g. spider mites) posing a possible threat to foliage and fruit quality. The incidence of most foliar diseases requires leaf wetness and thus infectious foliar diseases should be minimal if dry conditions persist.
See the links below for more in-depth information on the impact of drought conditions on various Indiana crops:
Hot, dry May brings drought to parts of Indiana - Purdue University News Service (Outlooks for Indiana crops)
U.S. Drought Monitor
Crop Management Information for Drought-Damaged Field Crops - Chat 'n Chew Cafe
Herbicide Applications in Dry Conditions (pdf file) - Purdue Weed Science
Tough time for trees: Heat, drought, and storms take their toll - Michigan State University