If you maintain any pitted fruit trees such as plums, peaches, or cherries, you already know that those types of trees are much more susceptible to diseases than any other type. While the fruits are delicious, it can be rather hard to live with all of the maladies that can plague the life of everyone who has ever grown one of those types of fruit trees.
The main disease that you will hear about the most is known as Brown Rot.. This is a fungus that attaches to many of the leftover fruits after the picking season is over. Not only does it look disgusting on the leftover fruits, but it also can come back on the newer fruits, rendering them inedible.
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To prevent this, you should prune your trees often to encourage good air circulation. Buildups of moisture are the main cause of the brown rot. Also when you are done picking for the season, you should get rid of all of the leftover fruits in the tree or on the ground.
The longan tree bears glossy, dark green compound leaves composed of four to eight leaflets. Even if it never produces fruit, it makes an attractive tropical shade or street tree. The small, yellowish, plumelike flower clusters occur in late spring with fruits ripening by mid- to late summer. The bark is coarsely smooth and pale cocoa brown.
Growing Requirements
Growing Requirements
- Plant longan in fertile, well-drained soil in a garden location that receives at least 10 hours of direct sunlight daily, according to Margaret Barwick in "Tropical and Subtropical Trees." Some shading from intense hot tropical midday summer sun is beneficial. The tree is susceptible to nutrient deficiencies, so an acidic topsoil at least 3 ft. deep is best. Maintain a 3 to 4 inch layer of organic mulch over the root zone. Longan is not drought- or salt spray-tolerant.
Considerations
- Like the closely related lychee tree, longan trees tend to flower more profusely and yield better fruit crops when the preceding winter has been cool and somewhat dry. Barwick notes that winters with frequent light frosts tend to increase the subsequent spring production of flowers. Fruit production is diminished after warm and humid winters during which temperatures had not dropped below 40 degrees Fahrenheit.
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