1. The concentration of preparation and use should be accurate

Plant growth regulators use a small concentration, the requirements are very accurate, and the concentration is too high, which will delay crop growth, deformity, flower falling, root growth stop and even death.

2. Spraying should be meticulous, master the treatment site and treatment period

When applying the plant growth regulator, mark it to prevent repeated application. For example, when preparing 2,4-D, it can be marked with red-blue ink or soil, and it can be sprayed onto the shoots and leaves, otherwise it will easily cause deformity. The treatment period should be strictly controlled. For example, gibberellin treatment of cucumber seedlings promotes male flowers, and treatment of cucumber young melons preserves flowers and preserves fruit and promotes growth; ethephon promotes male flowers at seedling stage; 2.4-D treats tomatoes, and flowers are newly opened. When it is bright yellow, the smear effect is the best. It is not effective for the treatment of unopened green flower buds and flowers with dark yellow flowers. The treatment site is controlled according to different crop growth regulators and use purposes, such as 2,4-D treatment of solanaceous fruit, to apply flower handle; anti-falling can spray inflorescence; 2,4-D treatment of cucumber young fruit, smearing melon, Prevent application to the parts of the melon.

3. Grasp the concentration according to the environment and conditions at the time of treatment

When a plant growth regulator is applied, it is generally used at a low concentration and a low concentration at a high temperature. Generally applied on sunny days, the plants in the cloudy days are slow to run, which may cause phytotoxicity. If the tomato is treated with anti-fallin, use 50mg/L at 20°C or below, 25mg/L at 20~30°C, and 10m/L at 30°C or above. Pay attention to the temperature change after treatment. If it is treated, the temperature will rise rapidly. High, prone to malformed fruit and other undesirable phenomena, such as cigar in the post-harvest ripening treatment, to ensure that the temperature reaches 20 ~ 25C.

4. Strengthen water and fertilizer management

After the melon and fruit vegetables are treated with plant growth regulators, a large number of young melons, young fruits or accelerated plant growth are often formed, and water and fertilizer management must be kept up to avoid malnutrition, so that the formed organs stop growing, and at the same time, some should be omitted. Malformed fruit.

Zhengzhou Delong Chemical CO., Ltd. is the production base of plant growth regulators in China, which established in 2009, specializing in offering plant protection products. If you have any question, contact us any time.