Journal of Food, Agriculture and Environment

Prediction of anthracnose (Colletotrichum gloeosporioides Penz.) on mango (Mangifera indica L.) in Soconusco, Chiapas 

Author(s):

José Nelson Pérez-Quintanilla ¹, Erika Patricia Pinson-Rincón ¹, Victor Manuel Díaz-Vicente ¹, Dagoberto Guillén-Sánchez ², Carlos Conrado Garibay-Gálvez ¹, Marco Antonio Martínez-Guerrero ³, Ricardo Hernández-Pérez ⁴

Recieved Date: 2013-06-07, Accepted Date: 2013-10-22

Abstract:

A study was conducted on a commercial mango cv. Ataulfo in 12 years old orchard in Tapachula, Chiapas, during May 22, 2002 to June 15, 2003 to generate information that be used in the prognostic of infection by Colletotrichum gloeosporioides Penz. Disease severity was assessed in 10 vegetative buds in each of 10 trees. A five-degree scale was applied: Grade 1= 0 necrotic points (np), Grade 2 = (1-4 np), Grade 3 = (5-15 np), Grade 4 = (16-35 np) and Grade 5 = (≥35 np). The rate of Disease Intensity Index (IID) was estimated every third, fourth and fifth day. Rainfall was recorded every 24 hours, the temperature and relative humidity every 10 min. The fungal spores were collected every 24 hours. The identification of the pathogen was performed using morphological and staining conidia colony in potato-dextrose agar (PDA). Spearman correlation coefficients (rs) and Determination (R2) using an ARIMA model analysis were determined. IID was evidently influenced by the relative humidity, but not by the maximum and average temperature, while negative correlation was obtained with minimum temperature. C. gloeosporioides spores fluctuation was determined by rainfall and relative humidity. The maximum temperature influenced negatively the number of fungus spores and the minimum temperature was positively correlated with the number of spores. With the collected information it is possible to predict, that application of fungicides should be started when there is a rainfall of 34 mm,  9.5 accumulating hours with relative humidity ≥95% and  foliage IID is 3.0. 

Keywords:

Prognostic model, fruit diseases, Mangifera indica, Colletotrichum gloeosporioides

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 1336-1340

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