DCPTA (GUAYULE) has no harm to the leaves and growth of the crop. It can not only promote growth to humans and animals, but also increase the aroma and color of the fruits. It can also enhance the disease resistance of objects. It is a plant growth regulator with excellent performance. It shows a significant increase in production in many agricultural crops and can improve the utilization rate of chemical fertilizers and increase crop resistance. Prolong storage organs dormancy, promote plant growth, break the dormancy. Promote germination, estrain the growth of the stem leaf bud., inhibition of flower bud formation, blossom and fruit thinning. DCPTA can be used in the seedling stage,tuber formation period and tuber expansion period of root crop and tuber crop, then can strengthen seedling, cause root enlargement, improve the root quality and increase the output. Root crops and tuber crops: turnip, beet, tomato, onion and so on. DCPTA can promote the growth of leaf vegetables during the seedling stage and growing stage, improve plant resistance and lead to harvest in advance. Leaf vegetables: cabbage, celery, lettuce and so on. It can also be used on legume crops, promote flowers in early flowering period, prevent the shedding of flowers and pods in pod formation period , improve the bean quality and increase the storage of protein, amine. DCPTA can be used on fruits, increase fruit setting percentage, strengthen fruit smell, improve fruit flavor and fruit quality,etc.