Abstract
Abstract Sunburn is responsible for significant losses in post-harvest and has motivated studies to diminish its effect on different types of cultivars. Thus, the present study proposes a rapid protocol to evaluate the photoprotective effect of suppressive formulations. The experiment consisted in placing fruits (mango) covered with different suppressor formulations about 7 centimeters from an incandescent source and measuring the surface temperature variation employing a thermometer and thermal camera. The formulations were based on a filmogenic polysaccharide (galactomannan) and reflective additives (hydroxyapatite, montmorillonite and bentonite clays). The best result was achieved with a coating with bentonite as an additive, which showed a statistical difference in temperature (43.3±2.1 °C) compared with the control (52.1±3.0 °C) and the standard kaolinite coating (39.4±1.7 °C). Thus, it was proven the viability of the protocol as well as of the alternative formulations in to reduce the sunburn effect. This contributes to solution for the establishment of the Tropical Agriculture.
Highlights
Materials and methodsThe sunburn effect is responsible for considerable economic loss in many orchids around the world
Fruits with sunburn symptoms are predisposed to develop postharvest disorders mainly due to the fungal attack (LAL; SAHU 2017). To mitigate such a problem, studies were done with crops of economic importance, such as apple (ALDEBENITO-SANHUEZA et al 2016; RACSKO; SCHRADER 2012), pineapple (LOPES et al 2014), pomegranates (SHARMA et al 2018) and pears (COLAVITA et al 2011)
The sunburn prevention is based on suppressing techniques such as shade nets, fruit bagging and particle films, e.g., kaolin clay (RACSKO; SCHRADER 2012)
Summary
Materials and methodsThe sunburn effect is responsible for considerable economic loss in many orchids around the world. Considering the good filmingform property of very common polysaccharides such as galactomannans (GLM), combined with the reflexive property of clay minerals, it is proposed some functional composite material suitable for sunburn protection. The clay minerals were kaolinite (KLT, positive control), hydroxyapatite (HAP), montmorillonite (MMT) and bentonite (BTT). Evaluation of Different Clay Addition on the Mango Photoprotection
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