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Summer autumn cucumber spray ethephon results
When cucumber plants have developed 2-3 true leaves, the flower buds on leaf nodes 2 through 11 begin to differentiate, but their sex is not yet determined. This is the optimal time for applying cucumber saponin, as the plant is still in a stage where it can respond effectively to the treatment. Once the plant has more than four true leaves, the sex of the flower buds has already been established, and applying the substance at this point will have little to no effect. Therefore, the best time for spraying in summer and autumn is when the plants are at the 2-3 true-leaf stage. Typically, the spraying should be done 1 to 3 times, with an interval of 7 to 10 days between each application.
The recommended concentration of ethylene diosgenin for cucumber plants is between 0.01% and 0.02%, depending on the number of applications. It is generally advised to use a 0.02% solution for two sprayings, or a 0.01% solution for three applications. The exact concentration may vary based on local growing conditions and plant response.
For the spraying method, it is best to apply the solution in the late afternoon, after 4:00 PM on a sunny day. The liquid should be evenly sprayed onto all parts of the plant, including the leaves and growing tips, ensuring that the droplets are fine and well-distributed. It’s also important to leave about 10% of the plants untreated, as these will produce male flowers that provide necessary pollen for the female flowers in the field, ensuring proper pollination.
In terms of fertilizer and water management, after the initial spraying at the seedling stage, the number of female flowers increases, and the internodes become shorter. Within the first 20 nodes of the plant, multiple female flowers may develop. However, for the young cucumbers to set and grow properly, it's essential to maintain strong cultural practices. This includes ensuring a consistent supply of nutrients and water throughout the growth cycle. In the later stages of growth, it's recommended to spray the plants 3 to 5 times with a solution of 0.3% potassium dihydrogen phosphate mixed with 3000–4000 times diluted 802 solution. This helps promote vigorous vegetative and reproductive growth and prevents early aging, leading to better yield and quality.
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Summer autumn cucumber spray ethephon results