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| Registros recuperados: 17 | |
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| Kienzle, J.; Zimmer, J.; Maxin, P.; Rank, H.; Bathon, H.; Zebitz, C.P.W.. |
| The efficacy of Quassia extract with a standardized content of Quassin was proved in various field trials in different regions during three years. The amount of Quassin of 6 g/ha/m tree height will be recommended to practice. It is not important to have a contact effect on the eggs. The larvae must feed on the product before they enter the fruit. There is a very good efficacy on primaray infestation. Furthermore, there is even an efficacy on secondary infestation. Thus, even if due to difficult conditions during application or not optimal termination of the treatment the efficacy on the primary infestation is not entirely sufficient, the secondary infestation will be controlled better. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13871/1/ecofruit_12th_42.pdf |
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| Kienzle, J.; Triloff, P.; Zebitz, C.P.W.. |
| In an organic orchard with a codling moth (CM) population less susceptible to CpGV it was tested, whether an increased dosage of CpGV by factor 10 would result in any increased efficacy. The applications were set in shorter than weekly intervals with 10 ml/ha Madex (low dosage plot) and 100 ml/ha Madex (high dosage plot). The higher dosage showed also a better efficacy, especially on the “active damage” (live larvae). The orchard where the experiments were conducted was known to have a less susceptible CM population (2004) although there were no serious CM problems reported by the farmer despite the CM control was done only with CpGV. It was investigated, whether natural antagonists might have been a reason for the absence of serious problems in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13758/1/ecofruit_12th_3.pdf |
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| Kienzle, J.; Buchleither, S.; Scheer, C.; Zebitz, C.P.W.. |
| Several products were tested for their efficacy in control of the apple seed moth (Grapholita lobarzewskii Ragonot). None of them had a good efficacy. With several treatments with Bacillus thuringiensis an efficacy about 50 % could be achieved. An early treatment before egg-laying seem to improve the results. Quassia extract (9 g Quassin/ha/m tree height) gave efficacy about 50-60 % even if treated only once. NeemAzal gave only moderate efficacy (about 40-50 %). Mating disruption method was effective if the populations were not too high when the treatements were started. With high populations there was no sufficient control in the first year of application. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/9029/1/ecofruit_12th_43.pdf |
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| Kienzle, J.; Zimmer, J.; Volk, F.; Zebitz, C.P.W.. |
| When resistance to the Mexican isolate of Cydia pomonella Granulovirus (CpGV-M) arose in several organic orchards in Germany in 2004 and 2005, the future of codling moth control became a serious concern of organic fruit growing. In 2006, a new virus isolate from Andermatt Biocontrol AG (Madex Plus) was first tested in two field trials in organic orchards on codling moth populations resistant against the Mexican isolate of CpGV. Madex Plus showed a better efficacy on these populations than Madex 3. However, larval mortality larvae seemed to be somewhat delayed. A very good effect was shown in population control. The number of larvae in corrugated card board belts was significantly reduced after treatment with Madex Plus. In addition to these trials,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13706/1/261%2D264.pdf |
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| Kienzle, J.; Zimmer, J.; Maxin, P.; Rank, H.; Bathon, H.; Zebitz, C.P.W.. |
| The best application technique and application data for the treatments with Quassia extract against the apple sawfly Hoplocampa testudinea Klug were tested. The spraying solution was distributed best on the receptacle of the blossom – the place where the sawfly larvae feed before the enter the blossom – when the treatment was effecttuated at fading blossom with a high amount of water (about 500 l/ha/mTh). The addition of T/S forte, a wetting agent, could also improve the efficacy of Quassia treatments in a lower dose. Thus, it is recommended to apply in fading blossom with addition of T/S forte and high amounts of water to obtain the best effect. If the conditions for applications are good and the infestation is not too high, the normally... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13759/1/ecofruit_12th_4.pdf |
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| Hetebrügge, K.; Fieger-Metag, N.; Kienzle, J.; Bathon, H.; Zebitz, C.P.W.; Zimmer, J.. |
| The release of Aphelinus mali HALD. from artificial rearing for the control of Woolly Apple Aphid (Eriosoma lanigerum HAUSM.) was tested in field trials. The release of adults proved to be more suitable than the release of cards with parasitized mummies as practised in the first trial. Setting free adult A. mali at the beginning of June reduced the aphid population, though its efficiency was not high enough to prevent damage of the trees totally. The practical applications of A. mali in early spring (after blossom) were not effective because climatic conditions were not suitable enough. The fertility of A. mali depends on temperature and light intensity. The application of Micula (rape oil) and T-S forte reduced the growth of the aphid population... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13764/1/ecofruit_12th_6.pdf |
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| Fritsch, E.; Undorf-Spahn, K.; Huber, J.; Kienzle, J.. |
| In the control of codling moth it is common to combine the granulovirus with other agents, especially fungicides, in spray application. Therefore the knowledge about the influence of these agents on the efficacy of the virus in tank mix is very important. Studies on this subject were part of a project supported by BMELV (German Federal Ministry for Food, Agriculture and Consumer protection) at the Institute for Biological Control of JKI in Darmstadt. The granulovirus of Cydia pomonella (L.) (CpGV) was mixed with 10 different agents at concentrations as applied in the field. After the exposure the virus activity was calculated from larval mortality determined in bioassays with neonates of a susceptible codling moth strain. Only two agents with a... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13704/1/252%2D255.pdf |
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| Kienzle, J.; Zimmer, J.; Klopp, K.; Maxin, P.; Yamada, K.; Bathon, H.. |
| The effects of Quassia extract on eggs and larvae of the apple sawfly Hoplocampa testudinea were studied in the laboratory. The efficacy of this extract was mainly due to an oral toxicity to neonate sawfly larvae. The main active ingredients, Quassin and Neoquassin, were tested sepa-rately as pure substances. While Quassin had a considerable efficacy also on older larvae, Neo-quassin was less efficient in this case. Since Quassin and Neoquassin were found in different Quassia sources in varying relations to each other and had different efficacy, they have to be considered separately in the definition of extract quality by the content of active ingredients. This requires the application of Quassia extracts before larval hatch. It was shown that low... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection "Organics" in general Fruit and berries. |
| Ano: 2005 |
URL: http://orgprints.org/4277/1/4003.pdf |
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| Kumpmann, S.; Kienzle, J.; Schulz, C.; Zebitz, C.P.w.; Trapp, A.; Kelderer, M.. |
| The application 01 NeemAzal-T/S, a product based on Neem extracts and plant oil, lor aphid contro I in apple orchards shows promising side effects on Adoxophyes orana. However, the efficacy 01 the recommended dosage 01 3 Vha at red bud stage is not enough lor a satisfying control 01 A. orana orchards with medium and high pest pressure. Field trials were carried out to introduce these side ellects in combination strategies with Bacillus thuringiensis or CA. PEX 2 (Granulovirus) lor ellicient control 01 this pesI. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14593/1/kumpmann_35.pdf |
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| Kienzle, J.. |
| In the frame of the project “Arbeitsnetz zur Weiterentwicklung der Anbauverfahren des ökologischen Obstbaus” (BOEL-project Nr. 03OE178) a group of fruitgrowers and advicers started to discuss new measures and new concepts to enhance biodiversity in organic orchards. Strips with flowering plants that can be integrated in the normal mulching system and thus, do not originate vole problems, are actually tested on the farms. Other measures as single bushes at the top and end of the rows are in discussion. If such measures are to be integrated successfully in the practice of organic fruit growing, the impulse must spring from growers themselves and their requirements regarding the different risks must be considered. Otherwise, an acceptance in practice... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13746/1/339%2D342.pdf |
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| Kienzle, J.; Zimmer, J.; Maxin, P:; Rank, H.; Bathon, H.; Zebitz, C.P.W.. |
| The best application technique and application data for the treatments with Quassia extract against the apple sawfly Hoplocampa testudinea Klug were tested. The spraying solution was distributed best on the receptacle of the blossom – the place where the sawfly larvae feed before the enter the blossom – when the treatment was effecttuated at fading blossom with a high amount of water (about 500 l/ha/mTh). The addition of T/S forte, a wetting agent, could also improve the efficacy of Quassia treatments in a lower dose. Thus, it is recommended to apply in fading blossom with addi-tion of T/S forte and high amounts of water to obtain the best effect. If the conditions for applica-tions are good and the infestation is not too high, the normally recommended... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/8806/1/ecofruit_12th_4.pdf |
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| Kienzle, J.; Zebitz, C.P.W.; Zimmer, J.; Volk, F.. |
| In first field tests on codling moth (Cydia pomonella L.) populations proven to be resis-tant against codling moth granulovirus (CpGV) Madex plus, a selectioned CpGV, proved to be rather effective and showed a better efficacy than Madex 3, the standard CpGV-product. However, it is to consider that high amounts of Madex plus were used (50 ml/ha and m tree height each seven sunny days (a rainy day is considered half a sunny day). Moreover, the risk of development of resistance against this new selection is not clear yet. Thus, even if now a new selection of CpGV is available for the first time, the strategy of codling moth control in organic farming must rely on more components than only CpGV and mating disruption in the future. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2007 |
URL: http://orgprints.org/9893/1/9893_Kienzle_Vortrag.pdf |
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| Hetebrügge, K.; Fieger-Metag, N.; Kienzle, J.; Zebitz, C.P.W.; Zimmer, J.. |
| The release of Aphelinus mali HALD. from artificial rearing for the control of Woolly Apple Aphid (Eriosoma lanigerum HAUSM.) was tested in field trials. The release of adults proved to be more suitable than the release of cards with parasitized mummies as practised in the first trial. Setting free adult A. mali at the beginning of June reduced the aphid population, though its efficiency was not high enough to prevent damage of the trees totally. The practical applications of A. mali in early spring (after blossom) were not effective because climatic conditions were not suitable enough. The fertility of A. mali depends on temperature and light intensity. The application of Micula (rape oil) and T-S forte reduced the growth of the aphid population... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/8808/1/ecofruit_12th_6.pdf |
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| Kienzle, J.; Zimmer, J.; Klopp, K.; Maxin, P.; Yamada, K.; Bathon, H.; Zebitz, C.P.W.; Ternes, P.; Vogt, H.. |
| Ziel des Projekts war es, die bestehenden großen Unsicherheiten bezüglich Qualität und Terminierung, Kombinationsmöglichkeit mit anderen Präparaten sowie Nebenwirkungen auf die Blutlauszehrwespe und andere Nützlinge des traditionell zur Regulierung der Sägewespe eingesetzten Quassiaholzauszuges auszuräumen. Des weiteren sollten mögliche Managementstrategien für eine Förderung der Blutlauszehrwespe auf ihre Praxistauglichkeit überprüft und gegebenenfalls optimiert werden. Folgende Erkenntnisse wurden aus dem Projekt gewonnen und sind für die Praxis relevant: - Quassia wirkt vor allem auf die Larven der Apfelsägewespe. Wichtig ist daher, dass Quassia ausgebracht wird, bevor die ersten Larven schlüpfen. Das Eistadium zum Ausbringtermin ist nicht von... |
| Tipo: Report |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2003 |
URL: http://orgprints.org/15735/1/15735%2D02OE084%2Dble%2Djki%2D2003%2Dapfelsaegewespe_blutlaus.pdf |
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| Kienzle, J.; Haug, P.; Maxin, P.; Künstler, B.; Dillmann, K.. |
| Im Rahmen des Projektes ist eine Schwachstellenanalyse der Anbaukonzepte des ökologischen Obstbaus gefolgt von einer Erarbeitung von kurz- und langfristig umsetzbaren fundierten und praxisnahen Strategieansätzen zur Optimierung dieser Konzepte in enger Vernetzung von Praxisbetrieben, Beratung, angewandter Forschung und Grundlagenforschung sowie fachspezifischer Experten erfolgt. Das bundesweite Diskussionsforum aus Praktikern, Berater und Forschern, das zur laufenden Weiterentwicklung der Anbaumethoden geschaffen wurde, ist inzwischen eingespielt, arbeitet effizient und richtungsweisend. Dadurch werden laufenden Arbeiten zu verschiedenen Fragen optimal begleitet. Neu auftretende Fragen können rasch aufgegriffen und bearbeitet werden. Diese Form der... |
| Tipo: Report |
Palavras-chave: Education; Extension and communication Fruit and berries. |
| Ano: 2007 |
URL: http://orgprints.org/16648/1/16648%2D03OE178%2Dfoeko%2Dkienzle%2D2007%2Darbeitsnetz_anbaukonzepte.pdf |
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| Kienzle, J.; Zimmer, J.; Volk, F.; Zebitz, C.P.W.. |
| Entomopathogenic nematodes were tested for their potential as tool in resistance management of codling moth Cydia pomonella L. in organic fruit growing. In two field tests, the adults emerging from stems treated with nematodes were monitored. In one trial, 90 % of efficacy could be shown. On-farm trials with favourable weather conditions showed an efficacy about 50-60 % on fruit infestation by codling moth in the year following the application. On-farm trials with unfavourable weather conditions showed no results. The favourable weather conditions for the application are discussed with reference to German conditions. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13712/1/277%2D283.pdf |
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| Registros recuperados: 17 | |
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