80 CONTENTS 13.1 Introduction 13.2 Eucalyptus diseases (gum) 13.3 Acacia diseases (wattle) 13.4 Pinus diseases (pine) 13.1 Introduction This chapter deals only with the major diseases of commercial forestry trees in South Africa.0 CONTENTS 13.1 Introduction 13.2 Eucalyptus diseases (gum) 13.3 Acacia diseases (wattle) 13.4 Pinus diseases (pine) 13.1 Introduction This chapter deals only with the major diseases of commercial forestry trees in South Africa.
The pigment responsible for most light-harvesting by plants is chlorophyll, a green pigment. The green color indicates that it is absorbing all the non-green light-- the blues (~425-450 nm), the reds and yellows (600-700 nm).
Carotenoids are also found in red, orange, and yellow foods, such as carrots, tomatoes, and egg yolks. Much like flamingos and carrots, grass contains a special pigment that gives it a green color. This pigment is called chlorophyll. Chlorophyll is used during photosynthesis. Photosynthesis is a process that takes places when a plant uses sunlight to turn carbon dioxide and water into sugar.