Bio-efficacy of Trichoderma harzianum Rifai and Botanical Extracts against Major Fungal Pathogens of Tamarind (Tamarindus indica L.) under Field Condition

Abstract

Domestic production of tamarind has decreased in the country due to diseases. Tests were made on the individual efficacy of botanical extracts like plant growth promoter (PGP) and oriental herb nutrient (OHN), as well as the Trichoderma harzianum Rifai as a possible biocontrol agent against major fungal tamarind diseases. Using Randomized Complete Block Design (RCBD), a field setup was established with five treatments: untreated (negative control), synthetic fungicide, OHN, PGP, and T. harzianum having three replications per treatment. Results revealed that T. harzianum is an effective biocontrol agent against major fungal tamarind diseases. PGP having similar efficiency with T. harzianum significantly inhibited the infection and provided immediate defense from diseases. OHN is less effective due to delayed reduced infection. The research output is a significant help in the management of various diseases that is cost-effective and safe.