Change in growth performance of crossbred (Ankole × Jersey) dairy heifers fed on forage grass diets supplemented with commercial concentrates     

Mupenzi Mutimura  Cyprian Ebong  Idupulapati Madhusudana Rao  Ignatius Verla Nsahlai 《Tropical animal health and production》2016,48(4):741-746

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In vitro effects of flutriafol and azoxystrobin on Beauvaria bassiana and its efficacy against Tetranychus urticae     

Mutimura C Gatarayiha  Mark D Laing  Ray M Miller 《Pest management science》2010,66(7):773-778

BACKGROUND: Testing the compatibility of chemical pesticides and fungal biocontrol agents is necessary if these two agents are to be applied together in the integrated management of plant pests and diseases. In this study, the fungicides azoxystrobin (a strobilurin) and flutriafol (a triazole) were tested in vitro for their effects on germination of conidia and mycelial growth of Beauveria bassiana (Bals.) Vuill. and in bioassay for their effect on fungal activity against Tetranychus urticae Koch. The fungicides were tested at three different concentrations [recommended rate for field use (1 × X) and the dilutions 10^?1× X and 10^?2× X]. RESULTS: Flutriafol inhibited growth of mycelia and germination of the fungal conidia at all concentrations tested in vitro, and also reduced the efficacy of B. bassiana in bioassays against mites. The inhibitive effect of azoxystrobin in vitro varied with the concentration applied. A significant effect was observed at 1 × X and 10^?1× X concentrations on both the germination of conidia and mycelia growth. At 10^?2× X concentration, azoxystrobin showed little effect on B. bassiana. However, when this fungicide was tested in bioassays, none of the concentrations reduced B. bassiana activity against mites. CONCLUSION: Azoxystrobin was most compatible with B. bassiana, while flutriafol was the most harmful. Further studies are required to confirm the negative effect of flutriafol on B. bassiana activity. Copyright © 2010 Society of Chemical Industry  相似文献   

卢旺达共和国山地丘陵区土壤侵蚀调查报告     

马波  李朝栋  王百群  Mupenzi Christophe  Nsanzabaganwa Justin  Hakorimana Egide  张加琼 《水土保持通报》2019,39(6):281-288

[目的]在卢旺达山地丘陵区开展土壤侵蚀调查,分析该区土壤侵蚀特征及成因,为尼罗河上游山地丘陵区土壤侵蚀预报和水土流失防治提供科学依据。[方法]在卢旺达布设4条调查路线并选择调查点,于2019年10月17—22日对调查点土壤侵蚀特征、成因及水土保持措施等进行了调查。[结果]卢旺达多山地且以农牧业为主,土壤侵蚀主要发生在坡耕地、损毁林地、建设用地等。坡耕地以片蚀和细沟侵蚀为主。损毁林地以片蚀和细沟侵蚀为主,部分出现沟蚀;当裸露地表形成草地或幼林后均较少发生土壤侵蚀。公路边坡、开挖边坡、土路路面及边坡等在降雨及径流的作用下产生沟蚀,部分路段偶有勤侵蚀发生。梯田是该国最主要的水土保持措施,具有较好的生态和经济效益。[结论]卢旺达土壤侵蚀主要以水力侵蚀为主,重力侵蚀次之。不合理的开垦坡地、毁林,加之多山的地形,导致侵蚀较为严重,威胁当地的生态安全及粮食安全。该区缺乏水土流失监测资料,需要重视水土保持基础理论研究,加强水土流失基础数据的监测和采集,同时需要加强其水土保持措施及土地管理工作,保障卢旺达农业的可持续绿色发展。  相似文献