Bean Root Rot Target Crops: Beans, Potatoes, Vegetables & Flowers. Damage When you pull up an infected bean plant, it will have a skimpy root system with most small roots missing. A dark area of decay may be present on the main stem near the soil line. Prevention Plant beans

Maize Rust Target Crops: Maize. Damage Badly affected leaves turn brown early and drop off. Plants that lose leaves to rust are weakened and will not produce as well as healthy plants. Prevention Avoid planting maize near trees, fences, or low pockets where dew is always heavy, and grow corn

Spinach Downey Mildew Target Crops: Spinach. Damage Spinach leaves with black patches and mold are not appealing to eat. Sometimes the inner leaves of infected plants escape damage. Prevention Choose resistant varieties, which are widely available. Make sure plants get good air circulation and plenty of sun. Rotate spinach to

Leaf Spots Target Crops:Broccoli, Cabbage, Kale & Cauliflower Challenges Leaf spot can weaken plants, but it will not kill them. However, when already infected plants receive more than twelve hours of constant warm rain, spores can be distributed so extensively that the plants cannot recover. Prevention Make sure plants get

Onion Purple Blotch Target Crops: Onions. Damage Spots on the leaves are at first small with white centres, but expand rapidly into oval, brown to purple blotches.  If the blotches grow around the leaves, or merge, the parts above the blotch wilt, collapse and die. Prevention Rotate out of onions