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A deficiency in plant chlorophyll, resulting in pale green, yellow or yellow/white foliage.

Pertaining to iris flowers, which have a base colour of white or yellow, with stippled or feathered edges of a contrasting colours.

The word used for the larvae of many species of moth. Usually green, brown or yellow soft-bodied caterpillars, often with stripes running their length, cutworms are voracious feeders of leaf, bud and stem and can destroy entire plants.

A fungal disease of peach, almond and nectarine trees, which causes an increase in cell growth, resulting in thick, puckered and curled leaves. These will then change colour from green to yellow and dark red.

Refers to foliage having patches of different colours, usually as a result of the chlorophyll content. Common combinations are green with cream, white or silver, although some plants produce foliage that mix green with reds and yellows.

.Identifying bumblebeesThere are six bumblebees likely to visit gardens, all varying in colour, size and tongue length. Each species favours different nest locations, such as below ground, trees or long grass.Similar to the white-tailed bumblebee, but with mustard-yellow

A soil that has a high activity of hydrogen ions, which gives the soil a pH value below 7 and produces a yellow, orange or red reaction when in contact with universal indicator solution (see pH). Acid soils are suitable for growing ericaceous

cause people to doze off: instead I will share three of my tulip planting rules (there are more but I am, as ever, aware of the dozing off problem).Firstly - a yellow tulip is a waste of space. Not because they are not lovely ('West Point') but because

The fungus Rhytisma acerinum overwinters on fallen acer leaves, then infects the new spring foliage. The first signs are yellow leaf spots that turn into large shiny black blotches up to 1.5cm across. Severe cases can mean the leaves drop early

them hard to spot. Large numbers cause yellowing of the leaves, dieback and loss of vigour.Heavy infestations of scale insects discolour the evergreen leaves of euonymus and leave yellow areas, which can lead to dieback and loss of vigour.With light