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几种药剂防治栗大蚜越冬卵试验 总被引：4，自引：0，他引：4
通过几种药剂对板栗栗大蚜越冬卵的防治试验表明：柴油乳剂在板栗发芽前防治栗大蚜越冬卵的效果明显优于其他有杀卵作用的杀虫剂，能有效控制栗大蚜的发生，减少生长季节化学农药的使用，降低农药残留，提高产品质量。 相似文献
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浙江省板栗主要病虫害及防治技术 总被引：10，自引：1，他引：9
对浙江省为害板栗的病虫害进行调查、研究，列举板栗的主要病虫害栗绛蚧、栗大蚜、栗瘿蜂、栗剪枝象甲、栗皮夜蛾、桃蛀螟和板栗疫病、芽枯病的为害症状及生态特性，并针对其发生特点，采用预测预报、工程治理、营林措施等防治技术，可取得良好的效果。 相似文献
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对辽宁省为害日本栗的病虫害进行调查、研究，详细介绍板栗胴枯病、栗实象甲、粟实蛾、栗皮夜蛾、桃蛀螟、栗红蜘蛛、天幕毛虫、舟形毛虫、舞毒蛾、天蚕蛾、栗透翅蛾、栗大蚜、蝙蝠蛾和梨圆蚧14种主要病虫害的为害症状，并针对其发生特点，提出一系列防治技术。 相似文献
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A new method of simultaneous determining Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) with a single sweep polarography
was developed. The experiment condition was studied and the results show that the optimum base solution is that the residue
got from evaporating 25 mL mixed solution, 2.5 mL 1.0 mol/L ethylenediamine, 3.0 mL 1.0 mol/L ammonia-ammonium chloride, 5.0
mL 10 % sodium sulfite and 0.5 mL 0.5 % gelatin were mixed and diluted to 25 mL with water. Under the condition of this base
solution, the polarography wave shapes of the six cations are ideal and without overlap of the peaks. In this base solution,
Cu(II), Zn(II), Fe(II), Mn(II), Co(II) and Ni(II) in synthetic samples were determined with relative errors 0.4–9.4% and relative
standard deviations 0.8%-12.2%. Under this experiment condition, one fold of Pb(II), Cr(VI) and Mo(VI) do not interfere with
the determination for Cu(II). This method has been used to the simultaneous determination of the amount of the six cations
in the samples of soil and Beiqi Tea. The relative standard deviations were 0. l%-2.1% and recoveries were 93.5%-99.0 %. 相似文献
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Dr. Alicja Buczek 《Journal of pest science》1996,69(1):23-25
The eggs ofArgas reflexus were splashed with the LiCl and Na2Cr2O7 saturated solutions on the 2nd day after laying and were kept at 25° C and 30% RH.Both examined chemical compounds caused great disturbances in embryogenesis ofArgas reflexus. Under influence of Na2Cr2O7 24.8% eggs died. The LiCl solution appeared to be more harmful on larvae development. 21.8% dead eggs, 11.6% dead embryos, and 8.9% larvae hatched abnormally were observed in these experiments
With one table 相似文献
Zusammenfassung Hemmende Faktoren bei der Embryonalentwicklung vonArgas (Argas) reflexus (Fab.) (Acari, Argasidae)Die Eier vonArgas reflexus wurden am 2. Tag der Embryonalentwicklung bei 25° C und 30% r. L. der. Wirkung gesättigter Lösungen von LiCl und Na2Cr2O7 unterzogen.Beide chemischen Verbindungen verursachten große Störungen der Embryogenesis vonArgas reflexus. Unter dem Einfluß von Na2Cr2O7 starben 24.8% der Eier ab. LiCl erwies sich als schädlicher für die Embryonalentwicklung dieser Zeckenart als Na2Cr2O7.Bei den Experimenten mit LiCl wurden 21.8% Eier, 11.6% Embryos und 8.9% (abnormal geschlüpfte) Larven getötet.
With one table 相似文献
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M. E. H. Shazali 《Journal of pest science》1985,58(7):121-123
Zusammenfassung Die Nachkommenzahl von einem Weibchen vonSitophilus oryzae oderSitotroga cerealella in Sorghum-Körnern nahm mit dem Ansteigen der ursprünglichen Elterndichte ab. Jedoch nahm die Gesamtzahl an Nachkommen beiS. oryzae bis zu einem Maximalwert zu und danach bei weiterem Anstieg der Elterndichte wieder ab (Crowding-Konkurrenz). BeiS. cerealella dagegen tendierte die Nachkommenzahl dazu, von einem Grenzwert ab—unabhängig von der Elterndichte—konstant zu bleiben (Wettkampf-Konkurrenz).
Mit einer Tabelle 相似文献
Intraspezific competition and progeny production inSitophilus oryzae (L.) (Coleopt.) andSitotroga cerealella (Oliv.) (Lepid.) in Sorghum grain
The number of progeny produced per femaleSitophilus oryzae (L.) orSitotroga cerealella (Oliv.), on sorghum grain, decreased as the initial parental density increased. However, the total number of progeny (off-springs) produced inS. oryzae increased to a peak then declined with further increases in parental density (Scramble competition). InS. cerealella the progeny produced tended to be fairly constant once a certain parental density was passed (Contest competition).
Mit einer Tabelle 相似文献
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Dr. Alicja Buczek 《Journal of pest science》1993,66(7):131-134
The eggs ofArgas (Argas) reflexus (Fab.) were exposed to 0.05% colchicine on 9th, 15th or 23rd–25th days of embryonic development at 25°C and 30% RH. The eggs on the 15th and 23rd–25th days of development were the most sensitive to colchicine. In these experiments 6.9% and 9.4% embryos died, respectively. The largest number of disturbances of egg hatch (11.5%) were observed after exposure of the eggs to colchicine on 23rd–25th days of embryogenesis. 相似文献
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In a recent paper, V. Michelsen(1988, Systematic Entomology 13: 271–314) revised 18 world species of anthomyiid cone and seed
pests and described a new genus,Strobilomyia gen. n. He consideredS. melaniola of Northeast China to be a synonym ofS. viaria of North America. That they are the same species is not accepted. We compared the morphological characters of male and femaleS. melaniola adults with the close relatives,S. viaria andS. sibirica. We conclude that they are not the same species and that S.melaniola is an independent species. 相似文献
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Ohne Zusammenfassung 相似文献