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茶黄螨又名侧多食跗线螨、黄茶螨、茶半跗线螨、茶嫩叶螨,属蛛形纲、蜱螨目,跗线螨科,在全国各地均有发生,其中以华北、长江以南地区受害较重。茶黄螨食性极杂,寄主植物多达30个科70多种,主要有茄子、黄瓜、番茄、辣椒、菜豆、马铃薯、萝卜、芹菜等。近年来该虫在山东菜区普遍发生,尤其对茄子危害较重,不仅造成茄子减产,而且影响品质,降低其商品价值。现将茶黄螨在茄子上的发生与防治介绍如下。一、形态特征茶黄螨成螨淡黄色至橙黄色,半透明有光泽,足4对。雌成螨长约0.21 mm,椭圆形,腹部末端平截,足较短,第4对足纤细,其跗节末端有端毛和亚端… 相似文献
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茶黄螨，又叫侧多食跗线螨、黄茶螨、茶嫩叶螨、白蜘蛛、阔体螨等，属蛛形纲蜱螨目跗线螨科。食性杂，寄主广，可危害30多个科70多种植物，在蔬菜生产上主要危害黄瓜、苦瓜、丝瓜、茄子、辣椒、番茄、菜豆、芹菜、萝卜、木耳菜等，一般造成减产10％-20％。由于茶黄螨危害症状酷似病毒病或生理病害， 相似文献
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蔬菜茶黄螨的危害与防治 总被引：2，自引：0，他引：2
茶黄螨,又叫侧多食跗线螨、黄茶螨、茶嫩叶螨、白蜘蛛、阔体螨等,属蛛形纲蜱螨目跗线螨科。食性杂,寄主广,可危害30多个科70多种植物,在蔬菜生产上主要危害黄瓜、苦瓜、丝瓜、茄子、辣椒、番茄、菜豆、芹菜、萝卜、木耳菜等,一般造成减产10％~20％。由于茶黄螨危害症状酷似病毒病或生理病害,常发生诊断错误,给蔬菜生产造成较大的损失。 相似文献
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茶黄螨,又名侧多食跗线螨、黄茶螨、茶半跗线螨、茶嫩叶螨,属蛛形纲蜱螨目跗线螨科,在全国各地均有发生,其中以华北、长江以南地区受害较重.据多年观察,茶黄螨在多种蔬菜上的发生具有普遍性,遭受其为害的蔬菜一般减产30%～50%,甚至更高.2003年高新办事处吕家黄瓜基地曾发生大面积的茶黄螨为害,由于茶黄螨虫体小,危害症状与病毒病相似,部分菜农误作病毒病防治,结果错过了最佳防治时期,造成大面积减产.为帮助菜农在今后生产中减轻茶黄螨为害,我们对茶黄螨发生及为害现状进行了详细调查,并探索出了有效防控技术措施. 相似文献
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侧多食跗线螨——柑桔的又一重要害螨 总被引：1，自引：0，他引：1
侧多食跗线螨又名半跗线螨或跗线螨 ,茶树上称茶黄螨 ,蔬菜上称白蜘蛛 ,属蜘蛛纲 ,蜱螨目 ,跗线螨科。可为害茶、豆科和茄科等数十种植物 ,其中尤以茶、辣椒、豇豆、菜豆和茄子等作物上发生多 ,受害重。过去在柑桔上为害一直较轻 ,仅在幼苗上发生较多。近年来在重庆市奉节、开县、北碚及四川和湖南的部分柑桔产区为害果实日益突出 ,降低了果实外观的商品性 ,成为一个比较突出的问题。其成螨和若螨均吸食柑桔汁液。柑桔的嫩叶、嫩芽、嫩枝和果实均可受害。如嫩叶在伸展前期受害 ,受害叶多纵向卷曲成筒状 ,叶狭小或呈扭曲状 ;在伸展中期受害后… 相似文献
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温室大棚彩色甜椒茶黄螨防治关键技术 总被引：1，自引：0，他引：1
茶黄螨又称侧多食跗线蟥,属蜱螨目跗线螨科,是温室大棚彩色甜椒生产中的重要害虫之一,全年均可发生.实践证明,彩色甜椒温室栽培获得高产的关键技术之一是及时有效地防治茶黄螨. 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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