Fruit weather damage

Water-soaked spots that turn gray, die, and drop out leaving shotholes are caused by angular leaf spot or by scab. Angular leaf spot causes small, brown, angular spots on fruit. Scab-damaged fruit develops sunken, brown spots with a sticky ooze. Scab is worse in cool. moist weather. Fancipak , Score , and Slice-master are resistant to scab. 

Causes considerable damage if there is wet weather during harvesting. Apparently healthy fruits can become rotten after a short period in storage, especially if they are wet when picked. 

Citrus trees are very susceptible to cold weather, and extended e.xposure to subfreezing temperatures can destroy the Crop. In order to protect the trees from occasional cold fronts with subfieezing temperatures, tree growers in Florida usually install water sprinklers on the trees. WOien the tenipeiature drops below a certain level, the sprinklers spray water on the trees and their fruits to protect them against the damage the subfieezing temperatures can cause. Explain the basic mechanism behind this protection measure and write an essay on how the system works in practice. 

Like other fruit trees, peach trees need a period of cold weather rest or dormancy. The number of hours of cold between 32° and 45°F each cultivar needs before it breaks dormancy is referred to as chill hours. (Cold below 32°F doesn t count toward meeting the dormancy requirement.) Once the number is reached, the tree assumes winter is over and starts growing the next warm day. Peaches bloom rapidly once their requirement has been met, which makes them more prone to frost damage than other fruit trees that are slower to burst into bloom. Call your local extension service to find out how many chill hours your area receives and what cultivars match that requirement. If you choose a cultivar that needs fewer chill hours than you normally receive, an unseasonable winter thaw in your area may bring the tree well into flower weeks before spring actually arrives. But if you choose one that needs more chill hours than your climate supplies, the tree won t get enough ehilling to stimulate normal bloom, v... 

Prevention and Control Blossom end rot is commonly from calcium deficiency. This often occurs when hot, dry weather or rapid growth (due to excess nitrogen, for example) draws extra water and nutrients to the leaves, starving fruit for this nutrient. Root damage can also interfere with calcium uptake. 

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