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本文从本科生科研能力培养的角度探讨了普通昆虫学理论课、实验课、实习课及考核方式的教学改革,以期促进创新型植物保护人才的培育。 相似文献
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The toxicity and neurological effects of mirex, chlordecone, and four hydrogenated mirex analogs were evaluated on the American cockroach. The severity of poisoning symptoms correlated with the ability of each compound to increase spontaneous activity and prolong synaptic afterdischarge in ganglia of the ventral nerve cord. Afterdischarge across the metathoracic ganglion was consistent with a characteristic wing splaying symptom in mirex-poisoned cockroaches. The actions of hemicholinium-3 and nicotine on nerve cords from mirex-poisoned cockroaches are described and are consistent with a hypothesis that the increased spontaneous activity and afterdischarge are the result of enhanced transmitter release in ganglia of poisoned animals. 相似文献
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The hydrolysis of trans-permethrin and α-naphthyl acatate by midgut, fat body, and cuticle homogenates from Pseudoplusia includens (Walker) was monitored during the development of the last instar. The midgut homogenates appeared to have two pH optima (7.6 and 8.6) for the hydrolysis of trans-permethrin, the fat body homogenates had one optimum (7.4–7.8), and the cuticle homogenates had a major optimum at 6.6. Hydrolysis of both substrates peaked during the late feeding stages for midgut and cuticle homogenates, although relative changes were not the same. Hydrolysis of trans-permethrin peaked during the late feeding stage in fat body homogenates, while hydrolysis of α-naphthyl acetate continually increased through the prepupal stage. Thus, the hydrolysis of α-naphthyl acetate is not necessarily associated with the hydrolysis of trans-permethrin. The LD50 values for trans-permethrin on the different stages appeared to reflect the influence of hydrolysis. 相似文献
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Acetylcholinesterase from fourth instar Anopheles albimanus larvae was studied in vitro. The acetylcholinesterase from both the resistant and susceptible strains behaved as a single enzyme “type,” with straight pseudo first-order insecticide inhibition lines which intersected the Y axis at 100%. The enzyme from resistant larvae was more slowly inhibited than the susceptible enzyme; bimolecular rate constants (ki) differed by approximately 1.2- to 6-fold for a range of organophosphorous compounds and 17- to 1570-fold for the carbamates. There was a good correlation between the levels of resistance and the acetylcholinesterase inhibition rates. 相似文献
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Lisa Leimar Price 《Agriculture and Human Values》2001,18(2):153-176
Enhancing the environmental soundness of agricultural practices, particularly in high input systems, is of increasing concern
to those involved in agricultural research and development. The Integrated Pest Management Farmer Field School, which is based
on farmer participatory environmental education, is compared to the No Early Spray intervention, which is a simple rule approach.
A research methodology was developed and tested in the Philippines to document farmers' pre- and post-intervention knowledge
of rice field insects, insect/plant interactions, and pesticides. The results indicate that increased knowledge from education
is linked to better pest management behavior. It is proposed that the methodology may also be useful for documenting other
areas of knowledge, in the design of educational interventions for farmers and in assessing their impact.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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根据普通昆虫学课程特点及教学实际过程中遇到的问题,提出了改革教学的方法和措施：通过加强实践教学的各个环节,提高学生的实践技能;利用改进了课程考核的方法的契机,激发学生的学习兴趣。 相似文献
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《农业昆虫学》和《农业植物病理学》联合教学实习模式的探索 总被引：1，自引：0，他引：1
本文分析了植物保护专业开设的《农业昆虫学》与《农业植物病理学》传统教学实习模式的内容和存在问题．讨论了实践教学模式整合与优化的必要性,提出了两门课程教学实习整合优化的思路和联合教学实习新模式的基本设想。并对初步的实践效果进行了评价。认为联合实习模式具备了该专业体系的系统性、完整性,突出了应用学科的理论性和实践性,较好地解决了教学与生产实际脱节的问题。在调动学生学习积极性、培养学生品德、提高能力、促进学生对专业了解、宣传学校、树立学校形象等方面有积极的推动作用。 相似文献
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《农业昆虫学》课程教学实习的探索 总被引：6，自引：0，他引：6
<农业昆虫学>是植物保护专业的一门主干课程,理论与实践结合非常紧密.因此,加强教学实习环节,培养学生动手能力和分析问题、解决问题的能力,是本门课程教学目标.本文在总结农业昆虫学课程教学实习改革的具体措施和体会的基础上,对如何培养学生的实践能力与综合素质进行剖析. 相似文献