Promalin® - Plant Growth Regulator


Some commonly asked questions on the use of Promalin® on apples:

Promalin® has two major ingredients. The first is Gibberellic Acid, commonly found in plants. The second compound is Cytokinin, 6-Benzyladenine. Gibberellins and Cytokinins are growth regulators specific to plants. The unsurpassed quality of Promalin® stems from the highly sophisticated process and unique quality control procedures that we use to manufacture Gibberellins.

The two ingredients in Promalin® contribute to increase fruit size: 6-BA stimulates cell division, and Gibberellic Acid causes cell expansion. These effects only take place in plant tissues and only during the very early development of the fruitlet. The result is a larger fruit with more and larger cells.

a) Temperature: For Promalin® to be absorbed and work in the tissue, the plant metabolism must be active. Thus, very low and very high temperatures must be avoided. Best results are obtained at temperatures above 15 ̊C and below 32°C.

b) Slow drying of the spray material allows for higher penetration of Promalin® into the plant tissue. Avoid low relative humidity (less than 40%) and windy conditions. Early mornings and late evenings are usually desirable spraying times, as long as the temperature is adequate.

These are the two main reasons why Promalin® is used worldwide. There is plenty of evidence that indicates that Promalin® will improve fruit size, total crop yield, and shift the packout of fresh fruit towards the larger categories. In addition, Promalin® will reduce skin russet and improve the fruit finish.

Promalin® applications utilize the same spraying equipment commonly used in apple orchards. In India, knapsack sprayer fitted with hollow cone nozzle or any other suitable nozzle or Foot sprayer/Rocker sprayer or any other suitable sprayer is recommended. Water volume also depends on wind, temperature, and relative humidity.

Using Promalin® during bloom, the use of adjuvant is not recommended as adjuvants may have thinning effects. A pH corrector is only necessary if the pH of the water is 8.5 or higher. Caution should be exercised since some surfactants and other additives may cause russet or phytotoxic reactions.


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