Plant biostimulant for chilli India. One of the most important vegetables and commercial spice crops are grown in India and other warm temperature regions of the world. Although there is a scope to enhance the productivity of chilli, there have been many limiting factors like damage caused by insect pests and mites. The application of plant growth regulators and biostimulants significantly increase the growth, yield and quality of the chilli crop. Biostimulants are defined by their horticulture functions, reduce the need for fertilizers and enhance nutrition efficiency, crop quality and abiotic stress tolerance. Even in small concentrations, these substances are very efficient.