Crop Regulation in Guava: A review

Abstract

Guava (Psidium guajava L.), commonly known as Apple of Tropics and
subtropics. Amongst various tropical and sub-tropical fruit crops like guava grown in
India, if left on its own, give several light crops of the variable quantities and qualities
from the various flowering flushes throughout the year. Therefore, to obtain higher fruit
yield during a particular period, bearing guava trees are given a resting period with
artificial means so that the natural flowering tendency of the trees is altered. This can be
achieved through root exposure and its pruning, shoot pruning, withholding irrigation
water, deblossoming, chemicals/PGRs application and shoot bending. Regulated crops
are desired to avoid glut in the market and also ensure the regular supply of fruits.
The basic principle of crop regulation is to induce flowering and fruiting in desired
season of the year that contribute to increased fruit yield, quality, profitability and
sustainability of the environment by reducing the use of the frequency of the pesticides.
Among various chemicals used NAA (600-800 ppm) and urea (10-15%) could be widely
used in different agro-climatic conditions for crop regulation in guava.