Alternativas de manejo de la hernia de la col (Plasmodiophora brassicae Woronin) en la parroquia de San Joaquín, Cuenca – Ecuador

Abstract

Horticulture in Ecuador is concentrated in the sierra region because of its ideal conditions for these crops, which are increased in the consumer's diet, cabbage is one of the vegetables most desired by the population due to its nutritional value; referring to the production of cabbage in the country, the province of Azuay occupies the fourth position with 698 tons / ha followed by the provinces of Cotopaxi, Imbabura and Pichincha. San Joaquin is the main parish that provides these products and also distributes them to Cañar, El Oro, Guayas and Oriente; however, in recent years the low yield of certain species horticultural is induced by the attack of Plasmodiophora brassicae which causes the disease known as the clubroot of crucifers, producers who have used inefficient control methods, causing even abandonment of land. For this reason, the present study aims at evaluating the efficiency that products between biological and chemical could have to handle this phytosanitary problem. A DBCA was applied; treatments were Trichoderma harzianum, T. koningii and PCNB (chemical) in two doses and a witness. The best results were obtained with the application of Trichoderma koningii, 1x106 cfu/cm3, this was able to control the disease in a better way, and there was also greater plant development, higher stem diameter and lower cost compared to other treatments. On the other hand is the witness and T. harzianum, 1x108 cfu/cm3 that did not reach good results