In Boswellia papyrifera （Del.） Hochst natural stands, we stud- ied the association of parasitic plants with B. papyrifera trees from which frankincense was tapped and marketed for domestic and export markets. Data o...In Boswellia papyrifera （Del.） Hochst natural stands, we stud- ied the association of parasitic plants with B. papyrifera trees from which frankincense was tapped and marketed for domestic and export markets. Data on the rate of infection of parasitic plants on B. papyrifera was collected in three transects located at separate locations around Baha kar, northern Ethiopia. Each transect had ten circular sample plots of 400 m2 and separated by 100 m. Species composition, DBH, height, crown di- ameter, number of main, secondary and tertiary branches and number of parasitic plants on individual trees were recorded. Sixteen tree species were recorded in the combined sample plots. The parasitic plant associ- ated with B. papyrifera was identified as Tapinanthus globiferus. This parasite infected 38% of Boswellia trees in sample plots. The infection rate of the parasitic plant varied from 1 to 33 per Boswellia tree. The infection of T. globiferus on B. papyrifera was predominantly limited to tertiary small branchlets arising from secondary branches; parasitic plants were absent on thick main and secondary branches. In all plots, infectionof T. globiferus was exclusively limited to Boswellia trees. The influence of T. globiferus parasitism on growth of Boswellia trees and its influence on yield of incense production needs further investigation. Management of natural stands for frankincense production should include measures to reduce infection by T. globiferus.展开更多
The study was conducted in date palm groves in Swaib region of Baghdad for the agricultural season 2012. The main objective of the present study was to evaluate the efficacy of lesser date moth, Batrachedra amydraula,...The study was conducted in date palm groves in Swaib region of Baghdad for the agricultural season 2012. The main objective of the present study was to evaluate the efficacy of lesser date moth, Batrachedra amydraula, sex pheromone lure and its longevity in harsh desert climate. Various trap types and height have been studied for traps baited with B. amydraula pheromone lure. Results indicated that an average of 11.33 males/trap/week was captured on traps baited B. amydraula lure during the last week of April, which represents the onset of insect in the field. The highest rate of trap catches was recorded as 20 males/trap/week during the first week of May. Around 90% of the moths were emerged during these two weeks. B. amydraula pheromone lure remained effective over a period 7-8 weeks. Traps which placed at a height of three meters from the ground level were found more efficient than those suspended at six meters. An average of trap catches was 1.99-5.32 males/trap/week for traps placed at three meters height and whereas 1-3.99 males/trap/week was recorded on traps placed in six meters height. Delta trap was found more effective than funnel traps when applied against B. amydraula.展开更多
基金financially supported by the Austrian Development Agency for financing CIFOR’s project in Ethiopia entitled"Supporting Community Forestry to Improve Livelihoods and to Facilitate Sustainable Management of Dry Forests in Ethiopia"(Project No.2008/03)
文摘In Boswellia papyrifera （Del.） Hochst natural stands, we stud- ied the association of parasitic plants with B. papyrifera trees from which frankincense was tapped and marketed for domestic and export markets. Data on the rate of infection of parasitic plants on B. papyrifera was collected in three transects located at separate locations around Baha kar, northern Ethiopia. Each transect had ten circular sample plots of 400 m2 and separated by 100 m. Species composition, DBH, height, crown di- ameter, number of main, secondary and tertiary branches and number of parasitic plants on individual trees were recorded. Sixteen tree species were recorded in the combined sample plots. The parasitic plant associ- ated with B. papyrifera was identified as Tapinanthus globiferus. This parasite infected 38% of Boswellia trees in sample plots. The infection rate of the parasitic plant varied from 1 to 33 per Boswellia tree. The infection of T. globiferus on B. papyrifera was predominantly limited to tertiary small branchlets arising from secondary branches; parasitic plants were absent on thick main and secondary branches. In all plots, infectionof T. globiferus was exclusively limited to Boswellia trees. The influence of T. globiferus parasitism on growth of Boswellia trees and its influence on yield of incense production needs further investigation. Management of natural stands for frankincense production should include measures to reduce infection by T. globiferus.
文摘The study was conducted in date palm groves in Swaib region of Baghdad for the agricultural season 2012. The main objective of the present study was to evaluate the efficacy of lesser date moth, Batrachedra amydraula, sex pheromone lure and its longevity in harsh desert climate. Various trap types and height have been studied for traps baited with B. amydraula pheromone lure. Results indicated that an average of 11.33 males/trap/week was captured on traps baited B. amydraula lure during the last week of April, which represents the onset of insect in the field. The highest rate of trap catches was recorded as 20 males/trap/week during the first week of May. Around 90% of the moths were emerged during these two weeks. B. amydraula pheromone lure remained effective over a period 7-8 weeks. Traps which placed at a height of three meters from the ground level were found more efficient than those suspended at six meters. An average of trap catches was 1.99-5.32 males/trap/week for traps placed at three meters height and whereas 1-3.99 males/trap/week was recorded on traps placed in six meters height. Delta trap was found more effective than funnel traps when applied against B. amydraula.
