Mango anthracnose optical detection.
Hahn F.
Author Affiliation: Centro de Investigación en Alimentación y Desarrollo, A.C. Unidad Culiacan Carretera al Dorado Km 5.5, 80170, Culiacan, Sinaloa, Mexico.
ASAE/CSAE-SCGR Annual International Meeting, Toronto, Ontario, Canada, 18-21 July, 1999. : 7 pp.
Abstract : Anthracnose, caused by Colletotrichum gloeosporioides [Glomerella cingulata], is the most important fungal disease of mango, attacking flowers, fruits and leaves. The symptoms appear as black lesions when the fruit is mature. However, during sorting immature fruits do not show any visual symptoms, and the mango disease is difficult to recognize. Reflectance spectral signatures were obtained from healthy mangoes without any anthracnose present. After inoculating the fruits in the laboratory, spectral measurements were taken every 24 hours to study anthracnose behaviour for 4 days. Discriminant analysis was carried out and high success rates obtained for detecting the disease. A sensor, for assessing sorters at packinghouses, and reducing high market losses can use the best discriminant spectral bands.