Agriculture Reference
In-Depth Information
Figure 3.8
Different types of microbial infestation of fruit trees.
Most fungi reproduce by spores, which function about the same way as
seeds. Fungal spores are often microscopic in size and are produced in
tremendous numbers. Most of them die because they do not find a host plant
to attack. Some can survive for weeks or months without a host plant.
Water or high humidity (above 90 percent) are nearly always essential for
