First, the cause of 1, the temperature problem. The best temperature for tomato coloring is 18-26°C. In the greenhouse, when the daytime temperature is higher than 32°C, the fruit grows and matures quickly, and the formation of lycopene is hindered and affects the coloration. When the temperature is too low, it will also seriously affect the coloring of the fruit. Second, excess nitrogen fertilizer. In the process of tomato growth, excessive use of nitrogen fertilizer can lead to the formation of more chlorophyll, which will inhibit the formation of lycopene and yellow or green patches on the surface of the fruit. Especially during the reddening stage, if too much nitrogen fertilizer is applied, the chlorophyll content will increase, causing the decomposition of chlorophyll to be postponed or slowed, affecting the lycopene and carotene spotting on the fruit, thus affecting the tomato coloration. When potassium deficiency occurs, the shoulder is yellow-green, and the vascular bundle of the heart and the heart is lignified; in the absence of boron, the fruit shoulder remains green with necrotic spots. Third, insufficient light. The coloration of the tomatoes also has a great relationship with the light. If the planting density is too large, the mutual shade between the plants will be caused, and the fruits will not receive sufficient light, resulting in poor coloring of the tomatoes, green shoulders, and uneven coloration. Control methods 1. When it encounters hot weather, it is necessary to increase the intensity of air release and control the temperature of the greenhouse to avoid poor coloration of tomatoes caused by high temperatures. 2, appropriate picking leaves, to avoid breathing shade, reduce the use of nitrogen fertilizer, increase phosphorus and potassium fertilizer and medium and small fertilizers, to avoid abnormal coloration of tomato fruit. Nutrition Biscuit,Black Tartary Buckwheat Sachima,Health Nutritious Tartary Buckwheat Twist,Xylitol Sesame Buckwheat Crisp Huantai Biotechnology Co., Ltd. , https://www.huantaifds.com