In Florida, research into the application of oak leaf extracts on citrus trees has shown promising outcomes in the fight against citrus greening, a disease devastating the industry. The disease, caused by the bacterium Huanglongbing and spread by the Asian citrus psyllid, leads to nutrient blockage within the trees. Lorenzo Rossi, an assistant professor at the University of Florida, spearheaded a study where a concoction made from oak leaves and water was applied to infected citrus trees. This treatment, meant to simulate natural conditions under an oak canopy, showed a significant reduction in disease symptoms and improved nutrient uptake in treated trees compared to controls.
While some growers, like Ben Bateman, have observed improvements in tree health through the use of oak-derived mulch, others like Steve Crump have not seen the same success. Crump, a fourth-generation citrus grower, notes the severe impact of greening on his groves and has experimented with various methods, including protective screen houses and bactericide injections, with varying degrees of effectiveness. Rossi's ongoing research, in collaboration with the U.S. Department of Agriculture, aims to isolate the beneficial components within oak leaves that may combat citrus greening.
Source: wuft.org
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