This book covers different aspects of crop protection in controlled environmental conditions. Concerned with protecting crops from pests, weeds, disease and theft. This provides growers with a wide range of technologies to improve sustainable agriculture for a growing world. It includes the protection of the horticultural crop from insect and nematode pests, diseases, quarantine; and growing the horticultural crops under protected greenhouse environment. Protected horticulture concept increases the availability of high quality and safe horticultural produce by developing improved crop management practices (e.g. organic farming, IPM and good farming practices) for sustainable and environmentally friendly horticultural crops production systems and by promoting neglected and high value horticultural crops as possible diversification options, according with their economic interest of nutritive value, and to make the best use of available germplasm and bio-diversity within distinct agro-ecological zones. Global reduction of chemical deposition into the environment is necessary. In protected horticulture, different strategies with biodegradable products are used to control pathogens.