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| Registros recuperados: 17 | |
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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, Jutta; 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 effi-cacy on secondary infestation. Thus, even if due to difficult conditions during application or not optimal ter-mination of the treatment the efficacy on the primary infestation is not entirely sufficient, the secondary in-festation will be controlled better. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/9028/1/ecofruit_12th_42.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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| 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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| Samara, R.Y.; Zebitz, C.P.W.; Monje, J.C.. |
| Host age selection in several German strains of Trichogramma aurosum Sugonjaev & Sorokina was examined in laboratory choice tests under direct observation for 90 min., in order to select candidate strains for attempts at controlling the codling moth, Cydia pomonella L. (Lepidoptera: Tortricidae). Experiments were conducted at room temperature by exposing combinations of two host ages (zero vs. 4 and 1 vs. 5-day old) to a single female wasp. Host age did not appear to affect the wasps parasitization behaviour, although they spent longer time drilling on old eggs (4 and 5 days old) compared with fresh ones (0 and 1 day old). This not necessarily means that they preferred fresh eggs over old ones, since both type of hosts were parasitized in the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14547/1/45_Samara_235_239.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.; 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.; 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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| Zebitz, C.P.W.. |
| Ziel dieses Projektes ist es, der ökologischen Obstbaupraxis ein kostenreduziertes und sicheres Verfahren zur Regulierung der Apfelsägewespe zur Verfügung zu stellen. Hierbei sollen die noch offenen Fragen zur Terminierung und Aufwandmenge der Spritzungen mit Quassia-Auszügen geklärt werden. Zur Klärung dieser Fragen sind Feldversuche über zwei Jahre hinweg notwendig. Es werden vier verschiedene Regionen (1 Standort Ahrweiler, 2 Standorte Süddeutschland, 1 Standort Sachsen, 1 Standort Jork) in die Versuche miteinbezogen. Die Obstbäume sollen jeweils zur geschlossenen Blüte, zur Vollblüte und zur abgehenden Blüte mit zwei unterschiedlichen Aufwandmengen an Quassiaex-trakt behandelt werden. Gegebenenfalls werden je nach Standort und verfügbaren... |
| Tipo: Project description |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2005 |
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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.; 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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| 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.; 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.; 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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| Zebitz, C.P.W.. |
| Die Versuche zum Vergleich der Benetzung des Blütenbodens mit Spritzbrühe bei einer Wasseraufwandmenge von 125, 250 und 500 l/ha/m Kronenhöhe zeigten eine deutlich bessere Benetzung bei höherer Wasseraufwandmenge. Hinsichtlich der Blühstadien konnte bei der Blüte direkt nach Abfallen der Blütenblätter die beste Benetzung erreicht werden. Die Freilandversuche ergaben ein ähnliches Bild: Die Wirkung war bei abgehender Blüte tendenziell etwas besser als bei Behandlung in der Vollblüte. Wurde der Spritzbrühe zusätzlich T/S forte, ein Netzmittel auf der Basis von Pflanzenölen und Tensiden, zugesetzt, konnte die Wirkung ebenfalls verbessert werden. Hat man also optimale Bedingungen (abgehende Blüte, hohe Wasseraufwandmenge, Zusatz eines Netzmittels,... |
| Tipo: Report |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2005 |
URL: http://orgprints.org/8594/1/8594%2D03OE524%2D2%2Dzebitz%2Dc%2D2005%2Dsaegewespe.pdf |
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| Kienzle, Jutta; 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, espe-cially 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 this... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/8805/1/ecofruit_12th_3.pdf |
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| Registros recuperados: 17 | |
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