Direkte Kontrolle von Vicia hirsuta (L.) S.F. Gray in Wintergetreide.

Die Rauhhaarige Wicke (Vicia hirsuta) tritt in konkurrenzschwachen Wintergetreidebeständen des Organischen Landbaus oft massenhaft und ertragswirksam auf, so daß direkte Kontroll-maßnahmen notwendig werden. Informationen zur Kontrolle von Vicia hirsuta bei starkem Unkrautdruck fehlen bisher weitgehend. In faktoriellen Feldversuchen in Winterroggen und Winterweizen werden daher die mechanische Kontrolle in frühen (Hacken, Striegeln) und späten Entwicklungsstadien (Herauskämmen) sowie die thermische Kontrolle und das Verätzen durch Einsatz von Kainit geprüft. Im ersten und dem laufenden zweiten Versuchsjahr zeigte sich, daß sich Getreide nach thermischer Behandlung vor Bestockungsende gut regeneriert. Behandlungen nach der Bestockung des Getreides schädigten Vicia hirsuta nicht ausreichend. In Vorversuchen im Gewächshaus war Vicia hirsuta in allen Stadien gegen das Verätzen mit Kainit empfindlich, der Wirkungsgrad bei Anwendung im Jugendsta-dium am höchsten. Im Freiland war die Wirkung stark witterungsabhängig, d.h. nur bei hoher Verdunstung und Einstrahlung ausreichend. Eine effiziente mechanische Kontrolle von Vicia hirsuta erscheint in Winterweizen demnach möglich. Voraussetzung sind die rechtzeitige Bearbeitung während des Schossens und ggf. wiederholte Durchfahrten bis nach dem Ährenschieben

Scientific review of the impact of climate change on plant pests: a global challenge to prevent and mitigate plant pest risks in agriculture, forestry and ecosystems.

Climate change represents an unprecedented challenge to the world?s biosphere and to the global community. It also represents a unique challenge for plant health. Human activities and increased market globalization, coupled with rising temperatures, has led to a situation that is favourable to pest movement and establishment. This scientific review assesses the potential effects of climate change on plant pests and consequently on plant health. The evidence assessed strongly indicates that climate change has already expanded some pests? host range and geographical distribution, and may further increase the risk of pest introduction to new areas. This calls for international cooperation and development of harmonized plant protection strategies to help countries successfully adapt their pest risk management measures to climate change.bitstream/item/224381/1/Scientific-review-of-the-impact-of-climate-2021.pd

Climate change and pathways used by pests as challenges to plant health in agriculture and forestry.

Climate change already challenges people?s livelihood globally and it also affects plant health. Rising temperatures facilitate the introduction and establishment of unwanted organisms, including arthropods, pathogens, and weeds (hereafter collectively called pests). For example, a single, unusually warm winter under temperate climatic conditions may be sufficient to assist the establishment of invasive plant pests, which otherwise would not be able to establish. In addition, the increased market globalization and related transport of recent years, coupled with increased temperatures, has led to favorable conditions for pest movement, invasion, and establishment worldwide. Most published studies indicate that, in general, pest risk will increase in agricultural ecosystems under climate-change scenarios, especially in today?s cooler arctic, boreal, temperate, and subtropical regions. This is also mostly true for forestry. Some pests have already expanded their host range or distribution, at least in part due to changes in climate. Examples of these pests, selected according to their relevance in different geographical areas, are summarized here. The main pathways used by them, directly and/or indirectly, are also discussed. Understanding these path-ways can support decisions about mitigation and adaptation measures. The review concludes that preventive mitigation and adaptation measures, including biosecurity, are key to reducing the projected increases in pest risk in agriculture, horticulture, and forestry. Therefore, the sustainable management of pests is urgently needed. It requires holistic solutions, including effective phytosanitary regulations, globally coordinated diagnostic and surveillance systems, pest risk modeling and analysis, and preparedness for pro-active management

Impacts of climate change on plant diseases – opinions and trends

There has been a remarkable scientific output on the topic of how climate change is likely to affect plant diseases in the coming decades. This review addresses the need for review of this burgeoning literature by summarizing opinions of previous reviews and trends in recent studies on the impacts of climate change on plant health. Sudden Oak Death is used as an introductory case study: Californian forests could become even more susceptible to this emerging plant disease, if spring precipitations will be accompanied by warmer temperatures, although climate shifts may also affect the current synchronicity between host cambium activity and pathogen colonization rate. A summary of observed and predicted climate changes, as well as of direct effects of climate change on pathosystems, is provided. Prediction and management of climate change effects on plant health are complicated by indirect effects and the interactions with global change drivers. Uncertainty in models of plant disease development under climate change calls for a diversity of management strategies, from more participatory approaches to interdisciplinary science. Involvement of stakeholders and scientists from outside plant pathology shows the importance of trade-offs, for example in the land-sharing vs. sparing debate. Further research is needed on climate change and plant health in mountain, boreal, Mediterranean and tropical regions, with multiple climate change factors and scenarios (including our responses to it, e.g. the assisted migration of plants), in relation to endophytes, viruses and mycorrhiza, using long-term and large-scale datasets and considering various plant disease control methods

QTL mapping for brown rot (Monilinia fructigena) resistance in an intraspecific peach (Prunus persica L. Batsch) F1 progeny

Brown rot (BR) caused by Monilinia spp. leads to significant post-harvest losses in stone fruit production, especially peach. Previous genetic analyses in peach progenies suggested that BR resistance segregates as a quantitative trait. In order to uncover genomic regions associated with this trait and identify molecular markers for assisted selection (MAS) in peach, an F1 progeny from the cross "Contender" (C, resistant) 7 "Elegant Lady" (EL, susceptible) was chosen for quantitative trait loci (QTL) analysis. Over two phenotyping seasons, skin (SK) and flesh (FL) artificial infections were performed on fruits using a Monilinia fructigena isolate. For each treatment, infection frequency (if) and average rot diameter (rd) were scored. Significant seasonal and intertrait correlations were found. Maturity date (MD) was significantly correlated with disease impact. Sixty-three simple sequence repeats (SSRs) plus 26 single-nucleotide polymorphism (SNP) markers were used to genotype the C 7 EL population and to construct a linkage map. C 7 EL map included the eight Prunus linkage groups (LG), spanning 572.92 cM, with an average interval distance of 6.9 cM, covering 78.73 % of the peach genome (V1.0). Multiple QTL mapping analysis including MD trait as covariate uncovered three genomic regions associated with BR resistance in the two phenotyping seasons: one containing QTLs for SK resistance traits near M1a (LG C 7 EL-2, R2 = 13.1-31.5 %) and EPPISF032 (LG C 7 EL-4, R2 = 11-14 %) and the others containing QTLs for FL resistance, near markers SNP_IGA_320761 and SNP_IGA_321601 (LG3, R2 = 3.0-11.0 %). These results suggest that in the C 7 EL F1 progeny, skin resistance to fungal penetration and flesh resistance to rot spread are distinguishable mechanisms constituting BR resistance trait, associated with different genomic regions. Discovered QTLs and their associated markers could assist selection of new cultivars with enhanced resistance to Monilinia spp. in fruit

Design drawing

viii, 408 p. : ill. ; 28 cm

Design drawing / Francis D.K. Ching with Steve Juroszek.

Includes index.Book fair 2013.viii, 408 p. :Get the completely revised edition to mastering the visual language of architecture. In his distinctive graphic style, world-renowned author and architecture educator Francis D.K. Ching takes us on another exciting journey through the process of creation. In Design Drawing, Second Edition, he unmasks the basic cognitive processes that drive visual perception and expression, incorporating observation, memory, and rendering into a creative whole. This edition unites imaginative vision with fundamental architectural principles to cover the traditional basics of drawing, including line, shape, tone, and space. Guiding the reader step-by-step through the entire drawing process, Design Drawing also examines different types of drawing techniques such as multiview, paraline, and perspective drawings -- and how they can be applied to achieve stunning results. In addition, this edition: -Goes beyond basic drawing books'Ching not only covers the principles, media, and techniques of drawing, but also places these within the context of what and why designers draw.-Features more than 1,500 hand-rendered drawings'beautiful illustrations that reinforce the concepts and lessons of each chapter.-Includes a supplemental CD-ROM'viewers will gain a greater appreciation of the techniques presented in this book through the power of animation, video, and 3D models. Twelve new modules are included, as is a video of the author demonstrating freehand techniques in a step-by-step manner. For professional architects, designers, fine artists, illustrators, teachers and students alike, this all-in-one package is both an effective tool and an outstanding value, demonstrating concepts and techniques in a visually stimulating format that transends comparable works in the field