| Mycotoxins | Mold source | Grains affected | Optimal temperature | Optimal Humidity | Favorabe conditions |
| Aflatoxins (B1, B2, G1, G2) | Aspergillus flavus Aspergillus parasiticus | Corn, sorghum, cotton seed, peanuts | 75 - 95 ˚F | 80% - 85% relative humidity 17% moisture content | Grain damage, constant high temperature and humidity |
| Vomitoxin (deoxynivalenol, DON) | Fusarium Graminearum | Corn, wheat, barley, sorghum, rye, others | 70 - 82 ˚F | 88% relative humidity 22% moisture content | alternating warm and cool temperatures during growing season, high humidity |
| Zearalenone | Fusarium Graminearum | Corn, wheat, barley, sorghum | 45 - 75 ˚F | 24% moisture content | alternating warm and cool temperatures during growing season |
| Fumonisins B1, B2, B3 | Fusarium verticillioides | Corn | Likely < 77 ˚F | likely > 20% moisture content | Drought during growing season, followed by cool, wet conditions |
| Ochratoxin A | Aspergillus Ochraceus Penicillium verrucosum Penicillium viricatum | Corn, wheat, barley, rye | 54 - 77 ˚F | 85% relative humidity 19% - 22% moisture content | Low temperatures |