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Pätzold Stefan Hbirkou Christine Dicke Dominik Gerhards Roland Welp Gerhard 《Precision Agriculture》2020,21(3):569-588
Precision Agriculture - The spatial distribution and density of different weed species were monitored during a long-term survey over a period of 9 years on a 5.8 ha arable field... 相似文献
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Davy Meijer Jaimie van der Vleut Berhane T. Weldegergis Thibault Costaz Marcus Vinicius Alfenas Duarte Apostolos Pekas Joop J. A. van Loon Marcel Dicke 《Pest management science》2023,79(5):1820-1828
BACKGROUND
The use of light-emitting diode (LED) lights in horticulture allows growers to adjust the light spectrum to optimize crop production and quality. However, changes in light quality can also influence plant–arthropod interactions, with possible consequences for pest management. The addition of far-red light has been shown to interfere with plant immunity, thereby increasing plant susceptibility to biotic stress and increasing pest performance. Far-red light also influences plant emission of volatile organic compounds (VOCs) and might thus influence tritrophic interactions with biological control agents. We investigated how far-red light influences the VOC-mediated attraction of the predatory mite Phytoseiulus persimilis to tomato plants infested with Tetranychus urticae, and its ability to control T. urticae populations.RESULTS
Far-red light significantly influences herbivore-induced VOC emissions of tomato plants, characterized by a change in relative abundance of terpenoids, but this did not influence the attraction of P. persimilis to herbivore-induced plants. Supplemental far-red light led to an increased population growth of T. urticae and increased numbers of P. persimilis. This resulted in a stronger suppression of T. urticae populations under supplemental far-red light, to similar T. urticae numbers as in control conditions without supplemental far-red light.CONCLUSION
We conclude that supplemental far-red light can change herbivore-induced VOC emissions but does not interfere with the attraction of the predator P. persimilis. Moreover, far-red light stimulates biological control of spider mites in glasshouse tomatoes due to increased population build-up of the biocontrol agent. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. 相似文献15.
Markus Dicke 《江苏农机化》2010,(5):8-8
<正>近年来,德国沼气工业发展迅猛,沼气工程数量由1996年的350座,增加到2009年的4600座,电子装机容量增长了35倍。目前德国沼气工程数量占欧洲的80%,在沼气领域有一千多家企业,一万多名员工。 相似文献
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Markus Dicke 《当代农机》2010,(11)
近年来,德国沼气工业发展迅猛.沼气工程数量由1996年的350座,增加到2009年的4600多座,电力装机容量增长了35倍.目前德国沼气工程数量占欧洲的80%,在沼气领域有企业超1000余家、员工10000余名. 相似文献
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Alley CO Chang RF Currie DG Poultney SK Bender PL Dicke RH Wilkinson DT Faller JE Kaula WM Macdonald GJ Mulholland JD Plotkin HH Carrion W Wampler EJ 《Science (New York, N.Y.)》1970,167(3918):458-460
After successful acquisition in August of reflected ruby laser pulses from the Apollo 11 laser ranging retro-reflector (LRRR) with the telescopes at the Lick and McDonald observatories, repeated measurements of the round-trip travel time of light have been made from the McDonald Observatory in September with an equivalent range precision of +/-2.5 meters. These acquisition period observations demonstrated the performance of the LRRR through lunar night and during sunlit conditions on the moon. Instrumentation activated at the McDonald Observatory in October has yielded a precision of +/-0.3 meter, and improvement to +/-0.15 meter is expected shortly. Continued monitoring of the changes in the earth-moon distance as measured by the round-trip travel time of light from suitably distributed earth stations is expected to contribute to our knowledge of the earth-moon system. 相似文献
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Dicke RH 《Science (New York, N.Y.)》1974,184(4135):419-429
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Host plant resistance is an effective protection strategy to control aphids in many crops. However, the evolution of insensitive aphid biotypes necessitates the search for new resistance sources. Wild relatives of crop plants can be important sources for resistance genes to be introgressed into new cultivars. Nasonovia ribisnigri (Mosely) (Homoptera: Aphididae) is an important pest of cultivated lettuce, Lactuca sativa. Since 1982, resistance introduced into lettuce cultivars has relied on the Nr-gene, originating from a wild relative, Lactuca virosa. In 2007 first reports appeared that Nr-based resistance had become ineffective against certain populations of N. ribisnigri. The objective of this study was to establish if the original donor of the Nr-gene L. virosa accession, IVT 280, is resistant against recently emerged virulent (Nr:1) N. ribisnigri biotypes. To this end we investigated feeding and penetration behaviour of virulent and avirulent (Nr:0) aphids on the resistant L. virosa, IVT 280, and two susceptible L. virosa accessions, using the electrical penetration graph method. Additionally, aphid performance was analysed in terms of survival, development time and reproduction on these accessions. L. virosa accession IVT 280 was resistant against all populations of N. ribisnigri tested. The ingestion of phloem was strongly reduced on the resistant accession compared to the susceptible L. virosa accessions. Additionally, none of the aphids survived on the resistant accession that, therefore, constitutes a good source of resistance in lettuce against both biotypes of N. ribisnigri. 相似文献
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