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

The outer layer of leaves is called the cuticle. The cuticle is a waxy coating that protects the leaf and prevents water loss. In some leaves, the cuticle may be visible due to its shine. More » Science Biology Botany

A leaf identification chart aids in the identification of trees by visual examination of the characteristics of their leaves. The typical leaf identification chart is divided into sections for various types of leaves, in... More » Science Biology Botany