Longan production in Asia - United Nations in Indonesia
Longan production in Asia - United Nations in Indonesia
Longan production in Asia - United Nations in Indonesia
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<strong>in</strong>fected branches become compact clusters. Flowers are poorly developed and the<br />
deformed <strong>in</strong>florescence lose all flowers on an <strong>in</strong>fected branch (the flowerless panicle<br />
resembles a broom).<br />
The earliest description of this disease <strong>in</strong> Ch<strong>in</strong>a was <strong>in</strong> 1941. In 17 cities of Fujian<br />
prov<strong>in</strong>ce, the percentage of trees <strong>in</strong>fested by witches’ broom varies from 20 to 100<br />
percent, the higher <strong>in</strong>festation occurs <strong>in</strong> mature trees. The disease causes an average crop<br />
loss of 10-20 percent. However, <strong>in</strong> severe cases, the loss can exceed 50 percent. This<br />
disease also occurs <strong>in</strong> other prov<strong>in</strong>ces such as Guangdong, Guangxi, and Ha<strong>in</strong>an. Beside<br />
Ch<strong>in</strong>a other longan grow<strong>in</strong>g countries <strong>in</strong> <strong>Asia</strong> have also reported the presence of this<br />
disease, for example, Thailand and Taiwan Prov<strong>in</strong>ce of Ch<strong>in</strong>a.<br />
Figure 8. Prevention from birds and bats us<strong>in</strong>g nett<strong>in</strong>g over <strong>in</strong>dividual tree<br />
(from: Nicholls, 2000).<br />
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