Disease Resistance Gained By Application of a Mixture of Potassium Humate, Trichoderma, Bacillus and Seaweed (Biohealth) to Several Crops in 3 Countries.

The microorganisms Trichoderma harzianum and Bacillus subtilis are well known as antagonists to soil-borne plant-pathogenic microorganisms e.g. Pythium, Rhizoctonia, and Fusarium. Potential synergistic interactions between a humic product (potassium humate), seaweed as the carrier agent and Trichoderma as well as Bacillus species were tested in laboratory and field trials.  Biohealth, a mixture of German potassium humate, Trichoderma harzianum and Bacillus subtilis and seaweed, is a product of Humintech Company (Germany) and was tested in field trials on head lettuce (Lactuca sativa) in Germany, cucumber (Cucumis sativus) and melon (Cucumis melo) in Saudi Arabia and rice (Oryza sativa) in Ecuador. The laboratory and field tests of Biohealth having application of 1 g L^-1 water (1000 L ha ^-1 or 1 kg ha ^-1 for watering 4 times (total 4kg ha^-1) showed significantly decreases in root disease infection (40% in cucumber and 30% in head lettuce) compared to untreated plants (control). At the same time Biohealth application increased significantly economic yield (26% in cucumber, 14% in rice and 19% in head lettuce) compared to untreated plants.