Effect of plant growth regulators and nutrients on fruit cracking in lemon

Sprays of GA₃, NAA, K₂SO₄, borax and CaCl₂ were applied during second week of May. Among growth regulators, the minimum fruit cracking was obtained with 40 ppm NAA followed by 20 ppm NAA and 10 ppm GA₃; whereas amongst the nutrients, 8% potassium sulphate registered the minimum fruit cracking followed by its other concentrations. However, cracking of the fruits was maximum in control trees where no spray was done. The peak period of fruit cracking was between third week of June to third week of July during both the years.