ISOLATION, IDENTIFICATION AND IN VITRO CHEMICAL CONTROL OF PATHOGENS RELATED TO ROÑA SYNDROME IN AVOCADO

• DOI: 10.22533/at.ed.973372330058

• Palavras-chave: corchosis, association, evaluation, efficacy.

• Keywords: corchosis, association, evaluation, efficacy.

• Abstract:

  Mexico is the world leader in the avocado market. The country contributes 34% of the volume of the product worldwide, however, it is often affected by various diseases that cause economic losses and quality in the aesthetics of the fruit, among which scab stands out. Symptoms appear mainly on fruit, leaves and young branches. Scab is identified as any symptom of corchosis as a defense response of the plant to various biotic and abiotic factors. Therefore, the present work was carried out with the following objectives: isolate and identify the fungi associated with scab syndrome in avocado and evaluate in vitro the fungi related to this syndrome, using eight products: Bankit Gold ® (Azoxystrobin and fludioxonil) 1.125 mL, Bankit® ( Azoxystrobin) 0.2 mL, Folpan ® (Folpet) 1.75 g, Tecto 60 ® (Thiabendazole) 0.3 g, Uniform ® ( azoxystrobin +metalaxyl) 0.25 g, Headline ® (Piraclostrobin) 0.078 mL, Cabrio ® (Boscalid + Pyraclostrobin) 0.4g and Blue Shield ® (copper hydroxide) 1 g dose of the formulated product, and a control without fungicide. With a completely randomized design with three repetitions. The isolated fungi were Colletotrichum sp., Alternaria sp., Pestalotiopsis sp., Nigrospora sp. and Curvularia sp. Bankit Gold (Azoxystrobin + Fludioxonil) was statistically the product that exerted a better control to all the fungi evaluated. While Folpan ® (Folpet) and Blue Shield ® (copper hydroxide) were the least effective.