Control of Peduncular Rot in Post-harvest Mango Fruits with Hydrotherapy and Refrigeration
Gerlan do Nascimento Rodrigues *
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
Edna Peixoto da Rocha Amorim
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
José Gomes Filho
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
Valdeir Nunes Carvalho
Faculty of Agronomic Sciences - fca - Unesp – Botucatu – SP, Brazil.
Samuel Silva de Lima
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
Erisson Marques da Silva
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
José Alexandre da Silva Filho
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
Jorge Luiz Xavier de Lins Cunha
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
Lucas Alceu Rodrigues de Lima
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
Alessandra da Silva Araújo
Federal University of Alagoas (UFAL) - Campus Delza Gitaí, BR 104 Norte, Km 85, Rio Largo, AL, Brazil.
*Author to whom correspondence should be addressed.
Abstract
The objective of this study was to evaluate the effect of hydrotherapy associated with refrigeration on the control of peduncular rot in mango fruits (Mangifera indica) of the Tommy Atkins variety. For this, an experiment was set up in the phytopathology laboratory of the Agrarian Sciences Center of the Federal University of Alagoas - UFAL - Delza Gitaí Campus - Rio Largo - AL, from June to December 2018. Mango fruits, previously inoculated with L. theobromae (106 con.mL-1), were immersed in warm water at temperatures of 40, 45, 50 and 55°C for 1, 5 and 10 minutes and then placed under refrigeration for 5 days, then evaluated for disease severity. The results show that hydrotherapy associated with refrigeration is able to control peduncular rot in mango fruits. The temperatures of 50, 55 and 60ºC in the time of 9 minutes of fruit immersion showed 100% control of the disease, in the time of 1 minute only the temperature of 60ºC presented control superior to 90% of the disease, the temperatures of 45 , 50 and 55 presented control of 74.6, 76.2 and 89%, respectively. In the time of 5 minutes, the temperatures of 55 and 60ºC were the best with control superior to 90% of the disease. In all immersion times, the equation that best fit the data was the 3rd degree polynomial. The temperature of 40ºC, in all evaluated times, was the only one that presented control of the disease inferior to 20%.
Keywords: Alternative control, hydrotherapy, Lasiodiplodia theobromae, Mangifera indica, peduncle rot