16 Aug Alternate Bearing Tendencies in Fruit Crops and Its Management
फल फसलों में एकांतर वहन प्रवृत्तियां और उसका प्रबंधन Alternate bearing means production of an excessive crop one year followed by little or no crop next year and Irregular bearing means production of a large crop one year followed by a lesser crop next year / or any irregular succession of crops differing as to yields. This phenomenon in perennial fruit crops appeared to be governed by positive and negative regulatory factors and their interplay decided the fate of meristems under optimum environmental cues. Flower initiation is very important because it is the first step towards attaining fruit. Floral induction is considered to be the result of elevated levels of up-regulated florigenic promoter (FP) and down-regulated vegetative promoter (VP), primarily gibberellins, whereas the reverse condition promotes vegetative growth. The production of vegetative shoots in place of reproductive shoots is due to the elevated level of gibberellin which is considered as a vegetative promoter. Paclobutrazol, a gibberellin inhibitor, reduces VP level and thereby increases FP/VP ratio which stimulates flowering shoots in weakly inductive shoots of fruit crops. Mango is a tropical evergreen fruit crop having a strong tendency towards alternate or biennial bearing habit. One of the methods to manipulate flowering is through the use of synthetic plant growth regulator, Paclobutrazol and potassium nitrate. The...