Document Type : Research Paper
Authors
1 Research Institute of Forests and Rangelands. P.O. Box: 13185- 116, Tehran, Iran
2 Research Center of Agriculture and Natural Resources of Lorestan Province
Abstract
Gaz-e-Alfi (oak manna) is a valuable by - product of western oak forests especically in northern parts of Zagross . The material has high medicinal and comercial value. The manna is produces on the leave surfaces and yong branches of two species (Quercus infectoria Oliv. and Q. brantii Oliv.) by nymphs and adults activithes of two aphids: (Tuberculoides anulatus Hartig and Thelaxes suberi Del.). The material then is sticken as sugar cristalized and used.
Production and utilization time of this material is on late spring and sometimes on first atumn. Distribution of host plants and aphids are in west Azarbaijan, Kordestan, Kermanshah and Lorestan provinces, but producer aphids in west Azarbaijan, Kordestan and Lorestan provinces are able to produce manna.
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