Botrytis cinerea and Colletotrichum spp. in strawberries: sensitivity and molecular characterization of isolates with different levels of sensitivity to azoxystrobin, thiophanate-methyl and iprodione

• Grant number: 14/16198-7
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: October 01, 2014
• End date: March 31, 2015
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Lilian Amorim
• Grantee: Juliana Silveira Baggio
• Supervisor: Natália A. Peres
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: University of Florida, Gainesville (UF), United States
• Associated to the scholarship: 13/21930-6 - Botrytis cinerea and Colletotrichum spp. in strawberries: fungicide sensitivity of isolates and spatio-temporal progress, BP.DR

Abstract

Diseases are considered one of the most important problems of strawberries and jeopardize its production by reducing agricultural income and rising financial spending with its management. Gray mould, caused by Botrytis cinerea, and the anthracnoses, caused by some species of Colletotrichum, are the main diseases of strawberries. Fungicide application is highly effective and thus is widely used to control these diseases. However, indiscriminate fungicide usage has been causing phytopathogenic fungi resistance problems and the diseases have no longer been controlled efficiently. Several authors have reported resistance in B. cinerea and Colletotrichum spp. of strawberries. Thus, characterization of sensitive and resistant B. cinerea and Colletotrichum spp. isolates to the main systemic fungicides used for strawberries in Brazil and epidemiological studies of the diseases caused by these pathogens are being carried out (FAPESP 2013/21930-6) to evaluate field isolates and to propose fungicide-resistance management strategies. Therefore, to better understand and complement the results of those studies, molecular analysis will be conducted to identify the mechanisms involved with the resistance of the pathogens to azoxystrobin, thiophanate-methyl and iprodione. Additionally, some tests using the spiral gradient dilution method, a rapid method for determining fungi sensitivity to fungicides, will also be carried out. These studies will be performed under the guidance of professor Dr. Natália A. Peres, at the Gulf Coast Research and Education Center of the University of Florida, USA. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BAGGIO, JULIANA S.; WANG, NAN-YI; PERES, NATALIA A.; AMORIM, LILIAN. Baseline sensitivity of Colletotrichum acutatum isolates from Brazilian strawberry fields to azoxystrobin, difenoconazole, and thiophanate-methyl. TROPICAL PLANT PATHOLOGY, v. 43, n. 6, p. 533-542, DEC 2018. (14/16198-7, 13/21930-6)

BAGGIO, JULIANA S.; PERES, NATALIA A.; AMORIM, LILIAN. Sensitivity of Botrytis cinerea Isolates from Conventional and Organic Strawberry Fields in Brazil to Azoxystrobin, Iprodione, Pyrimethanil, and Thiophanate-Methyl. PLANT DISEASE, v. 102, n. 9, p. 1803-1810, SEP 2018. (14/16198-7, 13/21930-6)

BAGGIO, JULIANA S.; WANG, NAN-YI; PERES, NATALIA A.; AMORIM, LILIAN. Baseline sensitivity of Colletotrichum acutatum isolates from Brazilian strawberry fields to azoxystrobin, difenoconazole, and thiophanate-methyl. ROPICAL PLANT PATHOLOG, v. 43, n. 6, p. 10-pg., 2018-12-01. (14/16198-7, 13/21930-6)