Alternative control of post-harvest diseases in Tainung 1 papaya

Abstract

Controlling post-harvest papaya diseases without using agrochemicals is a challenge for producers. This study aimed at evaluating the effect of clove essential oil, biological fungicide (Trichodermil®), resistance inducer (Cob Sistem®) and chemical fungicide (Imazacure®) on the in vitro control of phytopathogenic fungi isolates from papaya as well as on the post-harvest quality of Tainung 1 papaya. The in vitro experiment was conducted in a complete randomized design, with five fungal species x five treatments and five replications. The in vivo experiment was conducted in a complete randomized design, with five treatments x five storage times, five replications and three fruits per replication. The fruits were stored under refrigeration at 10 ± 2 ºC and 90 ± 5 % of relative humidity and evaluated at 0, 7, 14, 21 and 28 days of storage, plus two shelf life days at 25 ± 2 ºC, to simulate marketing conditions. The inhibition of mycelial growth was evaluated in the in vitro experiment, while the diseases occurrence and post-harvest quality of the fruits were evaluated in the in vivo experiment. The clove essential oil and Trichodermil® were as efficient as Imazacure® in inhibiting the mycelial growth of Alternaria sp., Colletotrichum gloeosporioides and Rhizopus sp. The treatments with clove essential oil, Trichodermil® and Imazacure® were similar in controlling the pathogens up to 21 days of storage. The treatments had no effect on the fruits soluble solid contents.

Software for agriculture climate risk management focused in smallholders

“…The fruit also has medicinal properties (Ercisli et al, 2012), which improve demand. Fig does not require a very rich soil for cultivation and normally is considered as drought tolerant crop (Sinha, 2003 Brazilian Papaya (Carica Papaya L) is an important horticultural crop to tropical and subtropical regions and Brazil is the second most important producer in the world, following India (Dantas et al, 2018).…”

Acompanhamento macroscópico de deterioração e crescimento microbiano em mamão ‘Formosa’: observação em ambiente doméstico como práticas do ensino remoto

“…Perdas pós-colheita desses frutos ocorrem principalmente pela frequência respiratória elevada, produção de etileno que estimula o amadurecimento e deterioração fúngica. Os danos ocorrem por fatores fisiológicos, patológicos e a transpiração ocasiona o murchamento do fruto, acelerando o processo de degradação (Andrade & Vieira, 2016;Martins & Siqueira, 2017) Outro fator que aumenta a incidência de perdas consiste nas doenças pós-colheita, ou seja, além da degradação decorrente do metabolismo interno, os frutos também passam por deterioração microbiana (Dantas et al, 2018;Freitas et al, 2018).…”