Formulation of Indigenous Trichoderma harzianum on the Growth and Yield of Shallot (Allium ascalonicum l.) in Pb Contaminated media

Abstract

The study was conducted to test several indigenous Trichoderma harzianum formulations to determine their effects on the growth and yield of shallots on Pb-contaminated land in an effort to increase shallot productivity. This study used a Completely Randomized Design (CRD) with one factor and four levels. The treatment of T. harzianum formulation was tested on shallots planted in polybags contaminated with lead, namely control (without treatment; indigenous T. harzianum formulation in the form of Breynia androgyna (sweet leaf) pellets, dose 3 g polybag-1; indigenous T. harzianum formulation in the form of dry corn rice, dose 3 g polybag-1; commercial Trichoderma formulation in the form of solution, 10 ml polybag-1, all of which were applied 0 days after planting. The treatment of indigenous Trichoderma harzianum fungi formulation gave a significantly different effect on the leaf length variable. In the observation of leaf length 14 and 63 days after planting, the formulation of T. harzianum sweet leaf pellets 3 g (+ 10 grains) polybag-1 showed the longest leaf length and was significantly different from the treatment without T. harzianum, formulation of T. harzianum solid dry corn 3 g polybag-1 and liquid formulation of T. harzianum commercial product 100 ml polybag-1. The best formulation of indigenous Trichoderma harzianum fungus on the growth and yield of shallots on Pb-contaminated land is the formulation of T. harzianum sweet leaf pellets 3 g (+ 10 grains) polybag-1.