Friederike de Mol

Friederike de Mol
University of Rostock · Lehrstuhl Phytomedizin (PM)

About

45
Publications
6,139
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398
Citations
Citations since 2016
22 Research Items
324 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080

Publications

Publications (45)
Article
In the discussion about glyphosate-based herbicides, the question of how repeated applications affect biodiversity has become prominent. However, approaches are lacking to assess direct glyphosate effects under real, on-farm field conditions. This paper focuses the effect of post-harvest and / or pre-sowing glyphosate use on weed density, richness,...
Article
Full-text available
The use of wildflower species as biogas feedstock carries the risk that their seeds survive anaerobic digestion (AD) and cause weed problems if spread with the digestate. Risk factors for seed survival in AD include low temperature, short exposure and hardseededness (HS). However, it is not possible to predict how AD will affect seed viability of p...
Article
The establishment of plants in an ecosystem is limited by the availability of seeds and the availability of suitable sites for establishment. Describing plant population dynamics by the relative strength of seed and establishment limitation is an important concept in the study of natural ecosystems. To date it is unclear if this concept is eligible...
Article
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Ensiling, a lactic acid fermentation process, is mainly used to preserve biomass. In addition, it has been shown to affect seed viability of some plant species. The extent to which this makes ensiling suitable as a weed control measure, however, has not yet been determined. Both the range of controllable species and the parameters of an ensiling pr...
Article
Full-text available
1) Background: Weed control decreases the competition for nutrients, but also the potential of increased phosphorus (P) mobilization in soils caused by higher plant diversity. (2) Methods: Impacts of weed species under maize on mycorrhizal colonization and plant-availability of P were investigated in two pot experiments. Plant traits and P mobiliza...
Article
Full-text available
Zusammenfassung Schwellenwerte im Pflanzenschutz sollen einen Anhaltspunkt geben, bei welcher Schaderregerdichte eine Bekämpfung mit Pflanzenschutzmitteln erfolgen soll bzw. wirtschaftlich sinnvoll ist. Für zahlreiche Ackerbaukulturen sind in den vergangenen Jahrzehnten Schwellenwerte erarbeitet bzw. festgesetzt worden. Wirtschaftliche Schadensschw...
Article
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The cropping of perennial wildflower mixtures to produce biomass for use in biogas plants is one option for breaking maize’s dominance as a bioenergy feedstock. The aim of this study was to investigate the development of weeds in commercially produced perennial wildflower mixtures. Weed control during the establishment of perennial wildflower mixtu...
Article
Full-text available
The effect of weed management that targets the seed stage on subsequent life stages is largely unknown. Post-dispersal seed predation reduces the number of seeds from the soil surface before the seeds contribute to the seedbank. Density-dependent processes can mitigate the effect of seed predation in subsequent life stages. In this study, we tested...
Article
Full-text available
Weed management is a challenge for farmers worldwide, and the problem is exacerbated by the spread of weed herbicide resistance. Simulation models that combine population dynamics and genetics are valuable tools for predicting the impact of competing management options on weed density, allele frequency, and phenotypic resistance levels. The new R p...
Article
Herbicide use simplified cropping systems, which lead to short rotations and sowing dates rather focusing on yield than on weed management. Re-diversifying these cropping systems should reduce the vast use of herbicides. We hypothesize that herbicide use decreases with more diverse cropping systems even with few common crops. Cropping system experi...
Article
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A better understanding of weed seed production is a key element for any long‐term management allowing some weeds to shed seeds. The challenge with measuring seed production in weeds is the large effort required in terms of time and labour. For the weed species Echinochloa crus‐galli, it was tested whether the number of seeds per panicle dry weight...
Article
Data on agricultural pesticide use are of increasing interest since understanding farmers’ pesticide use patterns is crucial for farm business, farm advisory, and agricultural and environmental policy. Member states of the European Union established different systems to estimate applied amounts of active ingredients per crop and hectare. However, t...
Article
Full-text available
Heracleum mantegazzianum is an invasive plant species with enormous effect on ecosystems and human health. Mechanical weed management often results in large amounts of biomass. Fermentation in biogas plants can be used for disposal of this biomass contaminated with seeds and for energetic utilization, if spreading of viable seeds with fermentation...
Article
Glyphosate herbicides play a prominent role internationally in weed management due to their broad spectrum effectiveness. There are concerns that a high reliance on glyphosate herbicides will negatively affect biodiversity over time. In Europe, where cropping systems are carried out without glyphosate resistant crops (GMO), glyphosate herbicides ar...
Article
Renewable energy produced at biogas plants has tremendously increased the demand for digestible biomass in central Europe over the last twenty years. As a consequence, new crop rotations combining conventional and recently introduced bioenergy crops are tested in long-term field trials. The aim of this work was to determine risks for soilborne whea...
Conference Paper
Full-text available
Echinochloa crus-galli (L.) P.Beauv. (barnyardgrass) is a widespread weed in maize cultivation. Herbicide application at seedling stage is a common weed management practice. The aims of this study are: i) can E. crus-galli compensate variations in plant density by increased per plant biomass, ii) the influence of early and late emergence on biomass...
Article
Weeds typically occur in patches of different sizes and densities. Post-dispersal seed predators contribute to biological weed control by removing newly produced weed seeds before they can enter the seedbank. Seed predation can limit weed population growth if seed predators respond to seed densities so that seed predation is highest within weed pat...
Article
Full-text available
Many insects show a typical antipredator behavior. The two simplest tactics are immobilization and flight. The antipredator behavior of wireworms, the soil-dwelling polyphagous larvae of click beetles, has not yet been investigated. Birds are known to attack wireworms. Our experimental method (picking up and dropping wireworms) mimics the first att...
Article
During the last decade, maize has become the crop with the second largest acreage in Germany. Therefore, agricultural advisors and the plant protection sector are interested in an overview of the weed species composition in maize fields, their determining factors and trends. From 2001 to 2009, a weed survey was conducted in 1460 maize fields throug...
Article
Full-text available
Clubroot disease caused by Plasmodiophora brassicae is an important disease of cruciferous plants. Although the pathogen is widespread and has been reported to cause high yield losses, the impact on winter oilseed rape (OSR) has not been experimentally verified. To quantify the risk potential of P. brassicae, we conducted two closely linked experim...
Article
The question on intraregional versus inter-regional variability in herbicide sensitivity for weed populations is of major importance, both in extrapolation of model parameters and in herbicide zonal approval procedures. We hypothesised that inter-regional variability in herbicide sensitivity for field populations would be the same as intraregional...
Article
Um die Verbreitung und die Befallsintensität von Plasmodiophora brassicae in Deutschland zu erfassen, wurden in den Jahren 2013 und 2014 Bodenproben von insgesamt 237 Rapsflächen in sechs Bundesländern mit Hilfe eines Biotests untersucht. Durch Befragung der Landwirte wurden der Boden-pH-Wert, die Bodenart und das letzte Rapsanbaujahr der Untersuch...
Article
Herbicides are still the most effective way of weed control. Evolved resistance to herbicides may become a serious and escalating problem in crop production systems worldwide. The challenge in avoiding the dissemination of resistant populations is an early exploration of resistance. Our study aimed at answering the questions: (1) Can the intra-fiel...
Article
Full-text available
To choose herbicides and their optimal dosages is a great challenge in chemical weed control in arable crops, because the choice of possible herbicide mixtures is big and economic consequences are hardly estimated. DSSHerbicide is a computer aided decision support system calculating cost-saving weed control measures. It is adapted to German conditi...
Article
Full-text available
Herbicide decision support systems can calculate efficient, economically optimized herbicide mixtures with reduced dosages, if field specific weed data are given. Thus, they can be a sensible tool for integrated weed control. However, advises of decision support systems have to be tested before introducing them into practical farming. In Mecklenbur...
Article
Full-text available
Several studies indicate links between regional occurrence of well adapted weed species and crop rotations. Monocultures or very short crop rotation, which increased in the past decades are crucial for the establishment and dispersion of problematic weed species. In this study the impact of crop rotation on the occurrence of the species Amaranthus...
Article
Full-text available
Weeds in agriculture are controlled indirectly by strategic management tools (crop rotation, fertilization, tillage). Herbicide use is a direct tactical management tool for weed control. However, strategic and tactical measures interact together regarding weed management and thereby influence weed infestations and herbicide use. This study investig...
Article
Full-text available
Weed seed predation is influenced for both biological and abiotic factors. Knowledge about these factors is necessary to optimize seed predation as a biological weed control measure. Here, we asked whether carnivorous carabid beetles can affect the seed predation. Additionally, the effect of weather on seed predation rate was investigated. For this...
Article
Full-text available
The soilborne pathogen Plasmodiophora brassicae causes clubroot on Brassica crops, a common disease in many oilseed rape growing regions. Here we investigate genetic diversity and geographic differentiation of P. brassicae populations from different regions in Germany. We compared three regions that differ in oilseed rape cropping history, oilseed...
Article
We present an approach of Linear Mixed Effects Modelling to analyse the influence of crop management factors like rotation, tillage, seeding time and cultivar on pesticide use intensity from on-farm data. We use data from 761 winter wheat crops in eight commercial farms and six different regions of Eastern Germany. By defining cropping year, farm a...
Article
We analysed pesticide use data of 539 winter wheat fields grown on seven commercial farms in North East Germany in the seasons 2001–2007. The data were originally collected as part of economic analysis. The aim of our study was to show the impact of agronomic measures typical for integrated pest management (IPM) on pesticide use intensity.We used m...
Article
Crop protection services gather data on pesticides in the context of product registration and for region-specific extension. For this purpose, the region Hannover conducts field trials, which depending on the initiators can be based on different designs. The purpose of this study was to see if it is possible to extract additional data from these da...
Article
Data sets, comprising information on weed densities of 1103 maize fields in Germany as well as their crop management practices and site-specific characteristics, were analysed. The objectives were to describe the joint occurrence of weeds and to asses the influence of crop management on weed species composition.Per field, weed densities were assess...
Article
Baraibar B, Daedlow D, De Mol F & Gerowitt B (2011). Density dependence of weed seed predation by invertebrates and vertebrates in winter wheat. Weed Research 52, 79–87. Weed seed predation has the potential to limit weed population growth within agricultural fields. Its success depends in part on the ability of predators to detect weed patches and...
Article
Full-text available
German plant protection law demands farmers to limit the use of pesticides to a necessary extent. In this article, we have developed a theoretical framework on deciding on pesticide use. We look at three different ways of interpreting how much pesticide is “necessary” to control a pest on a crop: (1) using a product at the recommended dose when a p...
Conference Paper
Loss predictions and advices for weed control in oilseed rape and cereals by CeBrUs CeBrUs is an internet advisory program for weed control in winter oilseed rape and in winter cereal crops. Losses caused by the site specific weed populations are predicted and tactical advices for weed control are given. Input data can be weed densities, weed cover...
Article
At present an online-advisory-system for weed control in winter cereals and winter oil seed rape is developed, basing on existing decision support systems for weed control in cereals and oilseed rape and including expert knowledge. As an internet running program CeBrUs (Cerealis Brassica Unkrautbekdmpfungssystem) will be offered to potential users...
Article
In the interdisciplinary INTEX-Projekt arable farming systems are realized and further investigated in an applied, large-scaled approach. As an example characteristics of the weed management in three farming systems (1995-98) are investigated to figure different demands to agriculture. For that purpose all treatments of soil cultivation and weed co...

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Projects

Projects (2)
Project
Under the scenario of climate change, these species are changing their behaviour and becoming important weeds in places where they were not a problem before. For this reason, this project, which is being carried out by the EWRS Working Group of Germination and Early Growth, is studying the emergence and development of several populations of these two species in order to develop models to describe these two biological aspects. This way we will be able to better understand and control their populations.