Signs of tomato plant diseases include halted growth, yellowing leaves, premature fruit ripening, dark spots on leaves, leaf curling and white scabby lesions on tomatoes. Symptoms vary according to the type of infection ... More » Science Biology Botany

Properly identify a tomato disease by visually inspecting all parts of the plant, making a record of symptoms and comparing these symptoms to a tomato disease key. Keep factors such as time of year, moisture level, tomat... More »

Reasons for tomato wilt include inadequate watering, vascular wilt conditions, tomato spotted wilt virus, walnut toxicity and stalk borers. Tomato plants suffering from wilt due to inadequate watering or attack by stalk ... More » Home & Garden Gardening & Landscapes
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Photosynthesis takes place in plant leaves, and in some small part, in the stem. Specifically photosynthesis takes place in the mesophyll cells where the chloroplasts are located in a leaf. More » Science Biology Botany

Tomato blight is a fungal growth that affects the leaves and fruit of the tomato and potato plant. It generally begins on the leaves. While difficult to control once it reaches the fruit, there are some steps to prevent ... More » Home & Garden Gardening & Landscapes

How Stuff Works explains that water reaches the leaves of plants through the xylem vessels, and it escapes through small holes in the leaf known as stomata. The process by which the water moves from the capillaries to th... More » Science Biology Botany

Signs of emerald ash borer infestation in ash trees include the thinning and death of upper branches in the canopy and sometimes new sprouts emerging from the trunk after upper parts of the trees die. The bark may split ... More » Science Biology Botany