Influence of Growth Regulators on Canopy Management of Fruit Crops- A Review

Author: Rahul R. Rodge, Rajni Rajan, Madhurima Chaudhuri, Harjinder Kaur and Lakhesing Girase

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Abstract

This review examines the effect of growth regulators on canopy management in fruit crops, focusing on the development and maintenance of their structure in relation to size and shape in order to achieve optimal productivity and fruit quality. Some Plant Growth Regulators (PGRs) are chemical substances that modulate natural hormonal functions to affect plant growth and development. PGRs can be utilized to enhance or decrease the height of plants. Many producers recognize that plant growth retardant is an effective tool for controlling plant development, such as Paclobutrazol helpful in significantly lowering the tree's height and canopy volume. Promalin encourages and morphactin hindered vegetative development at numerous sites with reduced canopy surface area. Ethrel was the only plant growth regulator increasing vegetative shoot growth in non-bearing apple trees, as well as the canopy management of guava orchards. Consequently, there is immense scope for improvement in comprehending the effect of growth regulators on the canopy management of different fruit crops. The major challenges in this area is that it is difficult to manage proper length width of canopy through training, pruning and also it require skill labors and proper time management to manage canopy. Here in this review, we explained alternative way in different fruit crop to manage canopy using some new growth promoters and growth inhibitors to manage canopy easily or effectively.

Keywords

Canopy, PGRs, growth promoters, inhibitors, fruit, management

Conclusion

This review leads us to the conclusion that some growth regulators and growth inhibitors play an effective role in canopy management, such as the application of Auxin paste to increase the crotch angle width of apples and the application of NAA to reduce shoot growth and control canopy size in high density orchard systems. Different pruning levels and benzyladenine (BA) were significantly efficient in enhancing apple cultivar budwood yield. Red Chief, Early Red One, Gale Gala, and Vance Delicious Significant effects of growth retardants on reduced tree height, canopy size, and spread Paclobutrazol soil and foliar sprays used to high density plantings of sweet cherry, peach, and plum decreased vegetative growth for two to three years. The application of different concentrations of paclobutrazol to "Lisbon" lemon trees decreased shoot and internode length while increasing shoot diameter. Also, three weeks later, the soil was sprayed with paclobutrazol at a rate of 1.5 g/m2 and their internodal lengths were significantly shorter. In just one year, the canopy diameters of the treated trees were lowered by 19.33 percent in height and 15.81 percent in width. The size of the canopy was optimised for dense planting. Promalin stimulates the development of side branches in young cherry plants. It is known that morphactins hinder shoot growth and internode elongation. Additionally, ethylene causes the commencement of flower buds and is therefore effective in crop canopy management. Hence, in future there is scope for canopy management using these new growth hormones for better productivity.

References

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How to cite this article

Rahul R. Rodge, Rajni Rajan, Madhurima Chaudhuri, Harjinder Kaur and Lakhesing Girase (2023). Influence of Growth Regulators on Canopy Management of Fruit Crops- A Review. Biological Forum – An International Journal, 15(4): 379-384.