Molds (fungal)

Molds affect a wide range of crops, including cereals, legumes, vegetables, and fruits. They are particularly devastating to seeds and seedlings, where they interfere with germination, and to harvested crops in storage, where they exploit physical injuries or high moisture levels to invade healthy tissues and spread rapidly throughout the bulk.

Symptoms of mold infection typically manifest as the development of fuzzy, colorful mycelial growth on the plant surface. Depending on the species, the mold may appear white, gray, green, or black. Over time, the affected area becomes soft, discolored, and emits a musty odor, indicating that the fungal enzymes are actively breaking down the plant cells.

The primary conditions promoting mold development are high humidity and poor aeration. In the field, heavy rainfall during harvest time can create a microclimate that encourages mold growth on standing crops. In storage environments, inadequate temperature control and lack of ventilation allow moisture to condense on the surface of grains or fruits, creating an ideal substrate for fungal proliferation.

The impact of mold infection is significant, often leading to reduced germination rates, crop failure, and extensive spoilage of stored products. Furthermore, many mold species produce harmful mycotoxins that contaminate the harvest and render it unsuitable for animal or human consumption. Management strategies include the use of seed fungicides, drying of grain to safe moisture levels, and maintaining hygiene in storage facilities.