|Consequences of global warming|
Once infected with Aspergillus and other fungi crops tend to accumulate mycotoxin contamination as the same dry conditions tend to also stimulate mycotoxin production. In the US alone in 2011 the value of crops dropped $190 million due to mycotoxin contamination, but finance aside there is a clear threat to the food supply of the world as nearly all of these crops are ultimately for human consumption.
This article points out two threats in particular. In developing countries testing of crops for mycotoxins isn't extensive and there have even been allegations that contaminated produce has been sold to those countries as it is cheaper on world markets, and cleaner grain produced in those countries is sold abroad (for higher prices) while the grain that is more contaminated is retained for domestic use. Secondly and possibly of more direct interest to US readers (and those in other developed countries) is that testing of grain and other products for mycotoxins isn't completely efficient. Some batches of grain are allowed through which exceed permitted levels and as the effects of global warming increase those batches are likely to have more toxins in them. Overall the amount of mycotoxin entering the food production industry is going to rise.
Steps are being taken to reduce the amount of mycotoxins present on stressed plant crops. Inoculating crops with fungi that cannot produce mycotoxins has been successful and the breeding of plants that are resistant to fungal attack (1, 2) is under active development.