In Vitro Assay Using W. and L. Plant Extracts to Control .

Avocado tree wilt is a disease caused by Rands. Recently, this disease has been associated to , another causal agent. Avocado tree wilt is being currently controlled with synthetic fungicides that kill beneficial microorganisms, polluting the environment and leading to resistance problems in plant pathogens. The current research work aims to provide alternative management using extracts from W. and L. to control the development of mycelia in in vitro. Raw extracts were prepared at UAAAN Toxicology Laboratory, determining the inhibition percentages, inhibition concentrations and inhibition lethal times. Several concentrations of the plant extracts were evaluated using the poisoned medium methodology, showing that both extracts control and inhibit mycelial development, in particular , which inhibits mycelial growth at concentrations lower than 80 mg/L, being lower than extracts. These extracts are promising candidates for excellent control of .