Herb farm and root disease. Successful management of plant diseases include environmental controls similar to that of the pest management plan. Chemical means are determined based on the type of plant disease present in the herb. Herb plants can be started from seed or purchased as a seedling. Common herbs grown from seed are basil, flat and curly leaved parsley, chives, dill, sage, thyme, rosemary, cilantro. Herbs can also be grown via vegetative means, rooting cuttings, division of the plant, bulbs, or tissue culture. The advantage of growing via a vegetative process gives you a plant that is exactly identical to the
Leaf cold and reduced sunlight by curtailing chlorophyll production. Red anthocyanin pigments are now thought to be produced in the leaf as it dies, possibly to mask the yellow hue left when the chlorophyll is lost—yellow leaves appear to attract herbivores such as aphids. Optical masking of chlorophyll by anthocyanins reduces risk of photo-oxidative damage to leaf cells as they senesce, which otherwise may lower the efficiency of nutrient retrieval from senescing autumn leaves. In the course of evolution, leaves have adapted to different environments in the following ways: The leaf surface is also host to a large variety of microorganisms;