Tomato should be cautious in the use of Zhuangzhang.

In recent years, many farmers have used hormones such as testosterone when chemical control tomato. However, due to improper use of auxiliary strong element, often resulting in small fruit, cracked fruit, green top and other phenomena. Therefore, it is suggested that tomato chemical control should be based on nutrition regulation, and attention should be paid to prevent the following situations from happening. 1. "Small fruit disease": Because farmers use large doses of Zhuzhuangsu (or Aifengwang) at tomato seedling stage and late time (generally at "high foot seedling"), although plant height is controlled, fruit cluster development is also inhibited. At this stage, the "rooting and seedling method" should be adopted. The specific method is as follows: 500 - 800 times of high quality organic humic acid active liquid fertilizer is selected to irrigate roots, 100 - 150 grams of liquid medicine is used for each plant, and Wanchun plant growth agent is sprayed in addition to hymexiline or Lvheng No.1 to promote root development and improve disease resistance. 2. "Fruit cracking disease": the use of Zhuzhuang element chemical control, can make the pericarp thickened, so that the rapid expansion of pulp, thus forming "fruit cracking disease." To prevent this disease, boron, calcium and temperature should be increased. Specifically, 300~500 times solution of boron calcium humate or 300~500 times solution of Gaomei should be sprayed at tomato flowering stage, and Zhuanggenkalibao should be applied with small fertilizer water. 3. "Green top disease": due to some farmers increased fertilizer, water, temperature management, so that fruit development too fast, coupled with the use of hormone spraying uneven, resulting in uneven development of various parts of the fruit, the formation of "green top disease." The method of root cutting and cooling should be adopted to control it. specifically, when that tomato grow the second and third ears of young fruit, biological organic fertilizer and potassium sulfate compound fertilizer are applied in furrows or hole to promote the growth of secondary roots, cultivate fertilizer absorption and water absorption capacity, and lay a good foundation for the later stage of growth.