Banana is a tropical fruit that has high nutritional contents such as carbohydrates, vitamins and minerals, but it is prone to enzymatic browning reactions due to polyphenol oxidase (PPO) activity. This research was conducted to inhibit the reduction of the lightness of banana flesh using Hypoiodous Acid (HIO) as specific acid. The banana peel was stored for 3 days at room temperature storage (27°C). The analysis was done on colour change based on the L* value. HIO was obtained using a reaction mixture between H2O2 and KI using peroxidase as a catalyst. The HIO was attached to the crown surface of the banana. The lightness was analysed using a digital colour meter within seven points of the area. The results showed that HIO could inhibit the lightness change of banana flesh resulting in a non-significant decrease in the lightness during 3 days of storage. This research might open the knowledge of the preservation of bananas by inhibition of its lightness change in the end-user banana consumer.
A field experiment was conducted to evaluate the efficacy of some insecticides viz., Emamectin benzoate 5% SG (11 ga.i./ha), imidacloprid 17.8% SL (22.5 g a.i/ha), Neem oil (3 ml/l), Beauveria bassiana (0.2 ml/l), fipronil 5% SC (50 g a.i/ha) against major pests of tomato (Lycopersicon esculentum Mill.). There were six treatments arranged in randomized block design with four replications. Fruit borer, whiteflies, aphids and leaf miner were found to be the major insect pests of tomato. Among the insecticide used, imidacloprid 17.8% SL was found to be the most effective for management of sucking pest viz., Whiteflies, Aphids, Thrips, Mealybugs, Jassids while emamectin benzoate was found more effective on tomato fruit borer. Beauveria bassiana was found least effective against all the insect pests.
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