Other climate-change-related factors complicate crop climate responses. When CO2 was elevated from present-day levels of 400 to 550 ppm in trials, yields of rainfed wheat, field pea and lentil increased approximately 25% . However, there was a 6% reduction in wheat protein that could not be offset by additional nitrogen fertilizer . Elevated CO2 will worsen some pest and disease pressures, for example, barley yellow dwarf virus impacts on wheat . Warmer temperatures are also expanding the potential range of the Queensland fruit fly, including into New Zealand , threatening the horticulture industry . Some crop pests  are projected to be negatively affected by climate change , but so too are beneficial insects. There is large uncertainty in rainfall and crop projections for northern Australia . For sugarcane, an impact assessment for CO2 at 734 ppm using the A2 emission scenario at Ayr in Queensland projected modest yield increases . Climate change is projected to adversely impact tropical fruit crops such as mangoes through higher minimum and maximum temperatures, reducing the number of inductive days for flowering .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report