Die Anbauversuche mit fremdl?ndischen Baumarten in den Staatsmaldungen des K?nigreichs Bayern     

Heinrich Mayr 《Forstwissenschaftliches Centralblatt》1907,29(3):129-137

Ohne Zusammenfassung  相似文献   

    

Heinrich Mayr 《Forstwissenschaftliches Centralblatt》1911,33(1):1-14

Ohne ZusammenfassungVorstehender Bericht wurde dem 6. Kongreß der internationalen Vereinigung forstlicher Versuchsanstalten in Vrüssel 1910 erstattet und wünscht der Versasser, ihn einem weiteren Leserkreis zugänglich zu machen.  相似文献   

Über die Anfälligkeit verschiedener Pelzsorten gegenüber Mottenfraß     

Dr. Heinrich Kemper 《Journal of pest science》1936,12(1):1-6

Ohne Zusammenfassung  相似文献   

Die formbildende Wirkung der Eigenlast von Stamm und Zweigen bei einem Nadelbaum     

Heinrich Härdtl 《Forstwissenschaftliches Centralblatt》1938,60(13):424-429

Ohne Zusammenfassung  相似文献   

Der SamenzünslerParalispa (Aphomia) gularis Zeller und seine Bekämpfung     

Heinrich Müller 《Journal of pest science》1939,15(5):51-56

Ohne Zusammenfassung Mit 7 Abbildungen  相似文献   

Die Anbauversuche mit fremden Holzarten in Preu?en     

Heinrich Mayr 《Forstwissenschaftliches Centralblatt》1902,24(2):75-80

Ohne Zusammenfassung  相似文献   

Eine forstliche Studienreise vor hundert Jahren     

Heinrich Fischbach 《Forstwissenschaftliches Centralblatt》1895,17(2):69-89

Ohne Zusammenfassung  相似文献   

Die Gliederung der forstwirtschaftlichen Produktionslehre     

Heinrich Wilhelm Weber 《Forstwissenschaftliches Centralblatt》1922,44(8-9):342-351

Ohne Zusammenfassung  相似文献   

Biological control of Lycoriella ingenua (Diptera: Sciaridae) in commercial mushroom (Agaricus bisporus) cultivation: a comparison between Hypoaspis miles and Steinernema feltiae     

Stephen Jess  Heinrich Schweizer 《Pest management science》2009,65(11):1195-1200

BACKGROUND: Mushroom cultivation may be adversely affected by insect pests, including sciarids (Lycoriella spp.), which were previously controlled by application of chemical pesticides. However, owing to food safety and environmental concerns, availability of pesticides for use during mushroom cultivation has diminished. Consequently, it is imperative to investigate alternative control strategies, not reliant on chemical pesticides, which may be used in an integrated pest management system. RESULTS: Application of the predatory mite Hypoaspis miles Berlese to commercial mushroom‐growing beds at the beginning of spawn run or just prior to casing (830 mites m^?2) significantly reduced immature sciarids, Lycoriella ingenua (Dufour), in the growing substrate and also adult activity towards the conclusion of cropping. A trend towards lower sciarid emergence from substrates and reduced adult sciarid activity was observed following the application of Steinernema feltiae (Filipjev) (1.5 × 10⁶ nematodes m^?2) at casing. No significant treatment effects on mushroom yield were observed. However, contamination of the mushroom crop by adult sciarids increased in untreated controls. Application of H. miles required a 12‐fold increase in labour when compared with application of S. feltiae. CONCLUSION: Contingent upon the development of an effective application system, H. miles has potential for the biological control of sciarids in commercial mushroom production. Copyright © 2009 Society of Chemical Industry  相似文献   

Analysis of the prevalence of distichiasis in the dog breed Elo     

Kaufhold J  Hamann H  Steinbach G  Gordon S  Brahm R  Grussendorf H  Rosenhagen CU  Distl O 《Berliner und Münchener tier?rztliche Wochenschrift》2006,119(5-6):233-237

The Elo is a recently established dog breed in which the eye anomaly distichiasis has been frequently observed. Out of a total of 234 Elo dogs ophthalmologically examined over four years, 27.8% of the dogs showed between 1 and 31 distichia. There were twice as many distichia in the upper than in the lower eyelid. Litter size, the number of examinations of Elo dogs per ophthalmologist and the proportion of genes of the Eurasian dog had a significant influence on the prevalence of distichiasis. The error probability for the inbreeding coefficient and the proportion of genes of the Old English Sheepdog were just above the significance limit of p = 0.05. No significance was found for the remaining effects. Heritability for distichiasis was estimated using a linear animal model. After transformation of the linear observed estimate onto the underlying liability scale the heritability estimate was h2 = 0.43.  相似文献