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4,000원
원문정보
초록
영어
The Acacia seyal Del. var. seyal belongs to family Mimosaceae is known locally as gum Talha tree. It is a multipurpose tree species occurs throughout the African gum belt in Savannah mostly in pure forest. In Sudan it thrives on heavy clay soils that receive an annual rainfall between 400-800 mm. It is an important source of rural energy (fuelwood and charcoal) and forage. As mentioned by Nair (2007) the economic damage causes by insect in natural forest often difficult to judge due to no enough research attention The tree is frequently affected by biotic factors among them the insect pests. During a survey in the 1980´s the tree was severely infested by the longhorned beetles (Cerambycidae) severely infesting other Acacia species, but the ecological data are overlooked. Therefore, the objective of the study was to assess infestation characteristics and to determine environmental factors triggering the attack of longhorned beetles. A temporary random sampling technique was applied to observe the damage characteristics of the longhorned beetles on tree species during May-July 2007. Five sample plots occupies by A. seyal were taken in Kordofan region directly observed for the presence of hole of emergence of the longhorned beetles, presence of dusts, presence of insect stages, girdling as well as other characteristics of damage . The study results indicate that the infestation rate of trees in the sampled sites ranged between zero and 23.08%. Further ecological researches are recommended.
목차
ABSTRACT INTRODUCTION MATERIALS AND METHODS Results Um Facarin natural reserve forest study site Simaih Agricultural project study site Discussion Conclusions References
키워드
Acacia seyal Del. var. seyalCerambycidaeGum beltInfestationLonghorned beetlesSudan
저자
Maymoona Ahmed Eisa [ Technische Universität Dresden, Institute of Forest Botany and Forest Zoology, Tharandt, Germany University of Kordofan, Department of Crop protection, Faculty of Natural resources & Environmental Studies - University of Kordofan P.O Box 160 -Elobeid 51111, Sudan ]
Corresponding author
Yahia Omar Adam [ University of Khartoum, Faculty of Forestry, Dept. of Forests Management, Code 13314, Box 32 Shambat Campus, Khartoum North, Sudan Technische Universität Dresden, Institute of International Forestry and Forest Products, Tharandt, Germany ]