What are post harvest diseases?

What are post harvest diseases?

• Postharvest diseases are those that appear and develop after harvest. Outcomes of postharvest diseases. • Products with defects are unmarketable leading to increased. cost of production and occasionally loss of an entire crop.

What causes postharvest disease?

Postharvest diseases caused by bacteria, molds, and yeasts can result in considerable losses of fresh produce during storage and in the supply chain. Control of postharvest diseases is therefore one of the goals of postharvest technology of horticultural crops.

Which disease may cause postharvest problems?

Common postharvest diseases resulting from wound infections initiated during and after harvest includes blue and green mold ( Penicillium spp.) and transit rot ( Rhizopus stolonifer )….6.6 Phomopsis : blight.

Disease Alternaria rot
Pathogen Alternaria solani
Crop Tomato
Incidence (%) 30

What causes granulation in citrus?

Granulation generally starts from the stem end of the fruit pulp and extends towards the stylar end, and the main causes of it are the number of abnormal physiological activities (Table 1). A view of granulation on the citrus fruits, pummelo fruits (a, b), “Newhall” navel orange (c).

How can we control post harvest disease?

Post-harvest diseases may be controlled by the application of thiabendazole, dichloran, dosa-ash, etc. These chemicals help to prevent infection and suppress the development of pathogen on the host surface.

How do you control post harvest disease?

Imazalil (IMZ) and thiabendazole (TBZ) are synthetic fungicides employed on a commercial scale to control a wide range of fungal diseases on fruits, vegetables, and ornamentals. (9) Both fungicides are applied to control postharvest decay in citrus fruit.

Why is Degreening done?

Degreening consists of chlorophyll degradation to allow the expression of natural pigments masked by the green colour. Eg. Yellowing of citrus fruits. Degreening process can be hastened by applying ethylene and done mainly in non-climacteric fruits like citrus.

What is granulation fruit?

Granulation is drying up, becoming hard with greyish colour and enlargement of the juice vesicles with increase in pectin, lignin, etc. resulting in reduction of the juice content. This occurs more in young vigorous trees than old trees.

What is post harvest operation?

The postharvest chain involves a series of operations starting immediately after taking a product from the field to its consumption. Postharvest operations include cleaning/washing, cooling, storage, grading, packaging, transportation, processing, and marketing.

What is post-harvest operation?

What is citrus Degreening?

Degreening of citrus fruit is a process by which the green color is removed from the peel by treating the fruit with ethylene gas to degrade chlorophyll and reveal yellow and orange colors for commercial and marketing purposes.

Which chemical is used for Degreening of citrus?

The system for colouring fruit is called degreening, the chemical used is ethylene and the method used is called trickle degreening.

Why granulation is required?

Why is Granulation Necessary? The granulation process allows particles to stick together more firmly. It increases the particle size of the constituents used, which are mostly very fine powders. The greater the particle size of a constituent, greater will be its compressive or binding ability.

Why postharvest is important?

Post-harvest plays a very important role in crop production as it determines the final product’s quality. If the crops turned out to be in good condition after postharvest it can be sold as fresh consumption.

What is post-harvest treatment?

Postharvest treatments generally consist in cleaning, selecting, grading, and packing of the fresh produce. However, some crops necessitate special handling or treatments. Root crops, such as potatoes and some tropical root crops, may require having their roots cured prior to long-term storage.

What are the types and major causes of post-harvest losses?

Mainly, during retailing, rotting, mechanical damage, poor handling, improper management of temperature and relative humidity, and hygiene problems during handling are among the major causes of postharvest losses.