The application of EM Technology shows a reduction on spreading new infections and retards evolution of pre-existing infections as follows:
- The indirect effect of beneficial microorganisms which occupied spaces on leaves taking place of Black Sigatoka fungus.
- The direct effect of substances generated by microorganisms contained in EM-1 ®
- The last effect makes a synergism between EM-1 ® and mineral oil.
At the semi-commercial level, EM Technology proved to be a feasible alternative to reduce the chemical burden in commercial control of Black Sigatoka programs.
Chemical burden decrease by 40%.
(Source: EARTH University-Chiquita (Costa Rica). 2008. Semi Commercial Evaluation of EM in Black Sigatoka Integral Control. p.16. Limón, Costa Rica)
- 20 cycles of EM-1® were applied within a total of 48 cycles a year to earn a chemical burden reduction by 40%.
- EM showed an excellent capacity to substitute the Mancozeb during control programs.
- These results motivate us to continue researching and developing EMTM (←not defined) as an effective method to substitute chemical fungicides (protectant and systemic) in control programs.
- Evaluations on the leaves were done for 14 alternate weeks and ended four weeks before harvest. The results showed that the number of healthy leaves were 8.4 with EM. The position of the YLS (youngest spotted leaf) was 7.4 with EM. The number of diseased leaves was 2.2 for the treatment.
The average infection rating was 0.52 for EM. So, the results indicate that EM can sufficiently control black sigatoka and maintain 8 to 9 leaves at about fruiting time. This is comparable to results using the regular chemical control with 10 leaves.