TY - GEN UR - https://orgprints.org/id/eprint/5931/ KW - BÖL KW - BOEL KW - FKZ 02OE091 KW - biologische Mittel KW - nachhaltige Lösungen KW - Regulierung KW - ökologischer Gemüseanbau KW - Wirksamkeitsvergleich (Screening) KW - kommerzielle Produkte KW - Gewächshaus KW - Mycotal (Verticillium lecanii) KW - Bio 1020 Neu (Metarhizium anisopliae) KW - Boverol (Beauveria bassiana) KW - PreFeral (Paecilomyces fumosoroseus) KW - Nemagreen (Heterorhabditis bacteriophora) KW - Nemaplus (Steinernema feltiae) KW - Dosis-Wirkungs-Beziehung KW - Sprühapplikation KW - Ultra-low-volume-Verfahren KW - Vegetationsperiode 2003 KW - Freiland KW - biological appliance KW - sustainable solutions KW - regulation KW - organic vegetable cultivation KW - commercial products KW - green house KW - dosage-effect-relationship KW - spraying application KW - ultra-low-volume-method KW - vegetative period 2003 KW - open field N2 - Ziel des Projektes ist es, durch den Einsatz biologischer Mittel nachhaltige Lösungen zur Regulierung von Schad-Thripsen im ökologischen Gemüseanbau zu entwickeln. Im Rahmen des Projektes soll ein Wirksamkeitsvergleich (Screening) folgender kommerzieller Produkte in unterschiedlichen Aufwandmengen im Gewächshaus erfolgen: Mycotal (Verticillium lecanii), Bio 1020 Neu (Metarhizium anisopliae), Boverol (Beauveria bassiana), PreFeral (Paecilomyces fumosoroseus), Nemagreen (Heterorhabditis bacteriophora) und Nemaplus (Steinernema feltiae). Weiterhin soll die Wirksamkeit der genannten Produkte im Halbfreiland und im Freiland getestet werden. Für die zwei wirksamsten Produkte soll im Rahmen der Untersuchungen eine Dosis-Wirkungs-Beziehung erstellt werden. In Biotests sollen verschiedene Formulierungen verglichen und mit Hilfe der herkömmlichen Sprühapplikation und im Ultra-low-volume-Verfahren appliziert werden. Das beste Produkt soll dann in der Vegetationsperiode 2003 im Freiland getestet werden. TI - Integration biologischer Pflanzenschutzverfahren für den ökologischen Gemüseanbau: Bekämpfung von Thripsen in Zwiebeln, Porree und Schnittlauch AV - none ID - orgprints5931 ER - TY - CONF EP - 348 A1 - Jung, Kerstin KW - BÖL KW - BOEL KW - FKZ 02OE091 KW - Pflanzenschutz KW - Nematoden KW - Pilze KW - Thrips tabaci KW - insect pathogenic fungi KW - Beauveria bassiana KW - Lecanicillium muscarium KW - Paecilomyces fumosoroseus KW - insect pathogenic nematodes KW - Heterorhabditis bacteriophora KW - Steinernema feltiae KW - biocontrol KW - field testing TI - Biological control of Thrips tabaci in the field ? possibilities and practical limits VL - Vol. 31 SP - 344 Y1 - 2008/// UR - https://orgprints.org/id/eprint/15258/ PB - IOBC/WPRS ED - Ehlers, Ralf-Udo ED - Enkerli, Jürg ED - Glazer, Itamar ED - López-Ferber, Miguel ED - Tkaczuk, Cezary N2 - Field trials against Thrips tabaci, an economically important pest insect, were conducted in 2003 at four different sites in Germany. The effect of the combined use of entomopathogenic nematodes and fungi on thrips should be investigated, in comparison to the effect of either pathogen alone. Commercially available products, Mycotal® (Koppert NL), PreFeRal® (Biobest BE), Naturalis L® (Intrachem IT), Nemaplus® and Nemagreen® (both E-Nema DE), were used. The trials were performed in onion, leek and chives, according to the EPPO guideline PP 1/85(3). Perfekthion® was used as chemical standard in onion. In leek, Spruzit® and Neudosan® were applied alternately. No chemical standard was applied in chives. The biocontrol products were applied either alone or in a mixture using common spray equipment. The nematodes were applied at a rate of 1x106 infective juveniles/m2. The dosage of the fungi was 1 kg (1.5 l in the case of Naturalis L®)/ha. The treatments started mid June and were repeated up to six times in weekly intervals. Insect pressure was low at all four sites, throughout the summer. T. tabaci was recorded only in medium numbers (mean of 30 specimen/plant max.). In two trials, no differences were detected between the treatments and the control. In the third trial (onion), a significant reduction was recorded for the treatment ?PreFeRal+Nemaplus?, both in the number of thrips/plant (2 compared to 6 in the control) and the frequency of infestation (38 % compared to 93 % in the control), one week after the final application (3 times in total). Also in the fourth trial (leek), the number of thrips/plant was lowest for the treatments ?fungi+nematode? (4 compared to 7 in the control), one week after the final application (6 times in total). In this trial, yield was measured additionally, and the weight/plant registered at harvest was 20 % higher for the treatments ?Nemaplus? and ?Mycotal+Nemaplus? than in the control (425 and 412 g/plant compared to 345 g respectively). The results presented here, show that the use of biocontrol nematodes and fungi need not be restricted to protected environments, field application against insects on the upper parts of plants is possible. Moreover, their combination has the potential to give a better reduction of the pest population than each agent alone. In consideration of the extreme weather conditions in Germany in 2003, and in comparison to the effect of the chemical standards, the results are regarded as promising. However, each crop situation needs its own proof of feasibility, since factors like the microclimate, created by the plant?s individual characteristics and the canopy it forms, may influence the activity of the pathogens and by this their efficacy. AV - restricted T3 - IOBC/wprs Bulletin ID - orgprints15258 ER - TY - CONF EP - 143 A1 - Jung, Kerstin KW - BÖL KW - BOEL KW - FKZ 02OE091 KW - Pflanzenschutz KW - Gemüsebau KW - Nematoden KW - Pilze KW - Thrips tabaci KW - insect pathogenic fungi KW - Beauveria bassiana KW - Lecanicillium muscarium KW - Paecilomyces fumosoroseus KW - insect pathogenic nematodes KW - Heterorhabditis bacteriophora KW - Steinernema feltiae KW - biocontrol KW - field testing VL - Vol. 27 TI - Combined use of insect pathogenic fungi and nematodes against the onion thrips, Thrips tabaci, in the field SP - 141 PB - IOBC/WPRS UR - https://orgprints.org/id/eprint/15257/ Y1 - 2004/// N2 - In the year 2003, field trials against Thrips tabaci, an important pest insect in onion, leek and chives, were conducted at four different sites with commercially available products based on insect pathogenic fungi and nematodes. The trials were performed according to the EPPO guideline PP 1/85(3) for the efficacy evaluation of insecticides ?Thrips on Outdoor Crops?. As a chemical standard Perfekthion® was used in onion. In leek, Spruzit® and Neudosan® were applied alternately. The biocontrol products used were Mycotal® (Lecanicillium muscarium, former Verticillium lecanii, Koppert NL), PreFeRal® (Paecilomyces fumosoroseus, Biobest BE), Naturalis L® (Beauveria bassiana, Intrachem IT), Nemaplus® (Steinernema feltiae, E-Nema DE) and Nemagreen® (Heterorhabditis bacteriophora, E-Nema DE). They were applied either alone or in a mixture using common spray equipment. A wetting agent was added. The nematodes were applied at a rate of 1x106 infective juveniles/m². The dosage of the fungi was 1 kg (1.5 l in the case of Naturalis L®)/ha. The treatments started mid June and were repeated up to six times in weekly intervals. Throughout the summer, T. tabaci was recorded only in medium numbers (mean of 30 specimen/plant max.) at all four sites. In two trials (onion, Mainz; chives, Horkheim), no differences between treatments and the untreated control could be detected. In the third trial (onion, Schifferstadt), a significant reduction was recorded for the treatment ?PreFeRal+Nemaplus?, both in the number of thrips/plant (2 compared to 6 in the control, respectively) and the frequency of infestation (38% compared to 93% in the control, respectively), one week after the final application (three times in total). Also in the fourth trial (leek, Bonn), the number of thrips/plant was lowest for the treatments ?fungus+nematode? (4 compared to 7 in the control, respectively; fungus here: Mycotal®) one week after the final application (six times in total). In this trial, yield was measured additionally, and it turned out, that the weight/plant registered for the treatments ?Nemaplus? and ?Mycotal+Nemaplus? was 20% higher than in the control (425 and 412 g/plant compared to 345 g respectively). These trials show that the use of insect pathogenic fungi and nematodes in the field is possible, confirming results of others collected in Great Britain and The Netherlands. In view of the extreme weather conditions in summer 2003 in Germany, and in comparison to the effect of the chemical standards, the results gained with the biocontrol agents are regarded as very promising. However, more experiments are necessary. ED - Elad, Yigal ED - Pertot, Ilaria ED - Enkegaard, Annie ID - orgprints15257 AV - public ER - TY - UNPB AV - public ID - orgprints17258 N2 - Thripse sind aufgrund ihrer versteckten Lebensweise nur schwer zu bekämpfen. Besonders im ökologischen Gemüsebau stehen kaum effiziente Mittel zur Verfügung. Die hier vorgestellten Versuche zeigen, dass eine Behandlung mit Nematoden und Pilzen den Thripsbefall reduziert. UR - https://orgprints.org/id/eprint/17258/ Y1 - 2003/// TI - Integration biologischer Pflanzenschutzverfahren für den ökologischen Gemüseanbau: Bekämpfung von Thripsen in Zwiebeln, Porree und Schnittlauch KW - BÖL KW - BOEL KW - FKZ 02OE091 KW - ökologischer Gemüsebau KW - Zwiebeln KW - Porree KW - Schnittlauch KW - Pflanzenschutz KW - Pilze KW - Nematoden KW - Bekämpfung KW - Thripse A1 - Jung, Kerstin ER -