A study prepared by the National University revealed that anthracnose has become a limitation for Hass avocado production, since the climatic characteristics of the areas where this fruit is produced (high humidity and temperature) are conducive to the development of the complex. pathogens that cause it.
This was the result after examining some crops in Valle del Cauca where it was found that the complex of pathogens that cause this disease, one of the most affecting plantations, are four species of fungi of the genus Colletotrichum spp.
For the researchers of the project “Increasing the sustainable competitiveness of the hillside in Valle del Cauca, west”, administered by the Universidad Nacional de Colombia (Unal) Sede Palmira and financed with royalty resources, the main thing has been to start with the identification and characterization of the agents that cause anthracnose.
For this, tissue samples were collected from diseased trees, isolated and grown in a culture medium. Then monosporic cultures were made, and from these they obtained what they call “genetically pure cultures”.
“Anthracnose is a disease of great economic importance because it affects flowering (it causes falling fruits that are in formation), and later it is more important in pre-harvest (due to the low quality of the fruits, they are not received by export plants) and post-harvest ”, said Professor Carlos Germán Muñoz, from Unal Palmira and supervisor of the project’s research work.
According to the investigation, in postharvest the affectation is especially worrying, since many times the fruit is well in appearance, but the pathogen is latent. “Then, by transporting it by boat, for example, the environmental conditions can be generated that make the disease develop and be” in full blast “when it arrives at the port,” the researchers said.