Agriculture is the main economic activity in Kenya, with horticulture being a major foreign exchange earner. The export of high-value and labour intensive horticultural commodities, such as fruits, vegetables and ornamentals play a key role in foreign exchange earnings. However, for the country to fully benefit from international trade opportunities the produce must comply with international standards and the import requirements of the importing countries. Increased access to international markets creates wealth at all levels, from macro-economic growth to poverty reduction both at individual and family levels. At production level, the major challenge is to reduce crop losses from diseases, pests and weeds while safeguarding the environment and a large proportion of crop production expenses go to crop protection activities. As a result of market liberalization, different types of pesticides, crop products and planting materials are imported into the country. This calls for stringent measures to curb entry of insect pests, diseases, noxious and invasive weeds that are capable of destroying various crop enterprises and the environment.