Monsanto is buying heirloom seed companies and heirloom seed trademarks. Here is a list of seed companies that are owned by or sell seeds from Monsanto and also a list of seed companies that do not sell Monsanto seeds.
Diseases of Plant Leaves. This picture describes the graphical detail of plant leave disease. White Flies Aphids Spots Grey Mould Powdery Mildew Leaf Fall Leaf Bronzing Rust Mealy Bug Yellowing of Leaves garden-organic-self-sustain