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

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
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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

Leaves are adapted for carrying out photosynthesis by virtue of their flat shape and periodic replacement, and because they contain most of the plant’s chlorophyll. Leaves are the primary location in which photosynthesis... 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