Acid Rain Increases Impact of Rice Blast on Crop Health via Inhibition of Resistance Enzymes.

Worldwide, rice blast () causes more rice crop loss than other diseases. Acid rain has reduced crop yields globally for nearly a century. However, the effects of acid rain on rice- systems are still far from fully understood.

Invasive Chromolaena odorata species specifically affects growth of its co-occurring weeds.

Plant-plant interaction is essential to weed invasion success and is related to impacts on the environment. To understand interactions of the well-known invasive plant siamweed (Chromolaena odorata) and its neighbors (exotic Praxelis clematidea and native cadillo) in South China, and their competitive mechanisms above- and belowground, a multicultivation experiment was conducted. Competitive indices, plant morphological traits, soil nutrient contents, enzyme activities, and microbial biomass were measured.