Tomato cracking is a disease that occurs frequently in tomato in late autumn and has caused serious damage to farmers. However, in the prevention and control of fruit cracking, it is difficult to find an effective agrochemical product for the prevention of fruit cracking, in addition to the use of scientific management of water and fertilizers and rational control of the greenhouse environment. After a large number of experiments, smart spray of 20-30ppm gibberellin can effectively prevent tomato cracking.
The gibberellin is sprayed on the top fruit (the seventh ear fruit) of the tomato when it is sitting and has bean size (not suitable for spraying during flowering period to prevent poor fruit setting or plant leggy). At this time, the bottom ear of the tomato is at the turning point. The middle ear of the tomato is in fruit expansion period, spraying gibberellin can play a role in stretching the peel cells and promote the growth of the peel, so as to achieve the purpose of preventing cracking.
The concentration of gibberellin should be strictly controlled. If the spray concentration is too large, it is easy to form empty fruit, which will also reduce the benefits. Under normal circumstances, when the temperature in the booth exceeds 25°C, the spraying concentration can be 20ppm; if the temperature is lower than 25°C, the spraying concentration should be slightly increased and 25-30ppm can be sprayed. In addition, it should be noted that different tomato varieties have different spray concentrations. It is best to test small areas first before spraying, and then to promote large areas.
Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com