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<正>葡萄无公害生产的关键环节就是病虫害防治。根据无公害葡萄生产技术规程,结合本地区病虫害防治经验,葡萄病虫害无公害防治,应以预防为主,综合防 相似文献
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无公害防治技术在林业病虫害防治中的应用 总被引:1,自引:0,他引:1
据统计,我国林业因病虫害引起的损失十分巨大,无公害防治技术的应用能很大程度上缓解这一难题。阐述了无公害防治技术在林业病虫害防治中应用的重要意义,分析了我国林业病虫害发生的主要原因,提出了无公害防治技术在林业病虫害防治中的具体应用。 相似文献
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<正>枣树病虫害种类多,分布广,危害重,是造成枣树产量低,质量差的重要原因,当前发生比较严重的虫害主要有:枣步曲、枣黏虫、桃小食心虫,主要病害有:枣疯病、枣锈病、枣裂果病等。防治时要坚持预防为主的无公害综合防治措施,以达到有效控制病虫害发生与危害的目 相似文献
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金丝小枣无公害生产的关键环节之一就是对病虫害的防治 ,必须贯彻预防为主综合防治的方针。近年 ,在金丝小枣无公害生产过程中探索出了既能有效控制病虫 ,又符合无公害生产的农药使用原则。1 坚持病虫测报和综合防治的原则金丝小枣主要病虫害有绿盲蝽象、红蜘蛛、桃小食心虫、棉铃虫、枣锈病、轮纹烂果病、炭疽病、褐斑病等。依据天气状况、天敌数量、病虫害发生的基数等因素进行预测预报 ,根据预报结果首先利用农业、物理、生物等多种措施进行防治 ,在未达到理想效果时 ,抓住防治的关键期 ,采用无公害农药 ,有选择地进行化学防治。2 严格… 相似文献
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正近年来,长武县为了调整产业结构,山地大力发展枣树,枣树成为农民致富奔小康的又一骨干产业。但是,随着枣树面积的不断增大,枣树的病虫害种类越来越多,危害越来越严重,造成枣树产量低、品质差、效益低,严重影响农民的务枣积极性。为了使我县枣树生产健康发展,充分调动农民务果积极性,生产安全、优质、无公害的枣产品,提高经济效益,病虫害防治要坚持贯彻预防为主的方针,有效地控制病虫害的发生,减少病虫害的危害,减轻 相似文献
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林业病虫害问题逐渐增加,为了加强防治效果,保护林木资源,可采取无公害防治技术进行处理,保证林木的健康发展,同时减少对环境的不良影响。本文对林业病虫无公害防治进行了概括,阐述了林业病虫害的发生原因,明确了无公害防治病虫害的重要意义,并且分析了林业病虫害无公害防治技术应用,包括生物防治技术、物理防治技术,使林业病虫害问题得到有效的控制,促进生态环境的健康发展。 相似文献
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无公害果品生产的重要环节就是病虫害防治,病虫害防治的基本原则是预防为主,综合防治。在无公害苹果园管理中,要多采用物理防治技术,尽量减少化学药品的使用,最大限度的减少农药残留。 相似文献
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林业病虫害的防治已经成为了我国营林综合治理中的一项重要的任务,在林业发展的过程中病虫害产生的原因有很多,因此在我国林业管理的过程中,要不断的提高病虫害的防治水平,采用无公害的方法进行防治,这种无公害的防治方式可以更好的保护森林。加强我国林业病虫害的防治力度,推动我国林业的可持续发展。本文主要对林业病虫害的发生原因及无公害防治措施进行了介绍。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM:To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS:In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS:PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P<0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION:This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引:2,自引:0,他引:2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引:6,自引:0,他引:6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %~ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献
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