Bert Lotz

Bert Lotz
Wageningen University & Research | WUR · Wageningen Plant Research

Dr, Team leader Applied Ecology

About

251
Publications
28,615
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3,190
Citations
Citations since 2016
16 Research Items
1554 Citations
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2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250

Publications

Publications (251)
Article
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Breeding innovations are relevant for sustainable agricultural development and food security, as new, resilient production systems require crop varieties optimally suited for these systems. In the societal debate around genetic engineering and other plant breeding innovations, ownership of patents on the technology used in the hands of large compan...
Technical Report
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Current food production on the islands of Bonaire, Sint Eustatius and Saba is limited. Most food is imported from surrounding countries. The objectives of this study were to assess the current state of affairs with respect to agricultural production in the Caribbean Netherlands, to identify opportunities for development of the agricultural sector,...
Article
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DNA modification techniques are increasingly applied to improve the agronomic performance of crops worldwide. Before cultivation and marketing, the environmental risks of such modified varieties must be assessed. This includes an understanding of their effects on soil microorganisms and associated ecosystem services. This study analyzed the impact...
Article
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We discuss whether genetic engineering and agroecology are compatible. For this, we investigated three cases of genetically engineered crops and considered agroecology as scientific discipline as well as a social movement. One case was the use of cisgenic modifications to make potato durably resistant to late blight, the second was the use of CRISP...
Conference Paper
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Three field experiments were conducted in two seasons in Zimbabwe to study the effects of rate and method of placement of NPK fertilizer on productivity of maize and the emergence and growth of weeds. Compound D (8% N, 14% K 2 O, 7% P 2 O 5 , 6,5% S) was applied at 75, 150 and 225 kg ha 1 using three placement methods viz. spot placement, banding a...
Technical Report
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Following global trends in population growth, urbanization and rising living standards, the global demand for water, food and energy is rapidly increasing. Meeting this surge of demand poses heavy pressures on existing water, food and energy systems. Typically these have already been constrained due to the competing needs for limited resources in m...
Article
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In the original publication of the article, Li et al. has been incorrectly cited in the following sentence “Interestingly, a complex trait par excellence, yield, was also shown to be amenable to an SDN-1 approach. Li et al. (2017) used CRISPR-Cas9 in rice to mutate the regulatory genes Gna1, DEP1, and GS3 and obtained plants with increased grain nu...
Article
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The application of Good Agricultural Practice (GAP) contributes to many aspects of sustainable farming, including integrated control of weeds, diseases, and pests, and optimization of fertilization and irrigation. It is a relatively neglected issue in debates regarding the application of new technology, such as genetic modification (GM), which ofte...
Article
Potato late blight disease remains the primary stressor of commercial potato production across the EU, typically requiring >10 fungicide applications per growing season to offset crop losses. In response, the goal of this study was to test and validate a novel, more durable, control strategy for potato late blight. This IPM2.0 strategy is based on...
Article
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Genetically modified (GM) plants may show unintended differences compared to the original varieties, due to the modification process. Such differences might in some cases affect non-target organisms linked to the crop into an agro-ecosystem. In this paper, we aimed to study interactions of two blight-resistant GM potato clones with the aphid specie...
Article
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One of the most promising New Plant Breeding Techniques is genome editing (also called gene editing) with the help of a programmable site-directed nuclease (SDN). In this review, we focus on SDN-1, which is the generation of small deletions or insertions (indels) at a precisely defined location in the genome with zinc finger nucleases (ZFN), TALENs...
Article
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New agrifood technologies are often difficult to grasp for the public, which may lead to resistance or even rejection. Insight into which technology features determine public acceptability of the technology could offer guidelines for responsible technology development. This paper systematically assesses the relative importance of specific technolog...
Article
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From 2006 through 2015, a research project on Durable Resistance in potato against Phytophthora (DuRPh) was carried out at Wageningen University and Research Centre. Its objective was to develop a proof of principle for durable resistance against late blight by cisgenesis. This public-funded project aimed at stimulating research on genetic modifica...
Article
Various new plant breeding technique (NPBT) approaches have a similar aim, namely to produce improved crop varieties that are difficult to obtain through traditional breeding methods. Here we review the opportunities of products created using NPBTs. We categorize products of these NPBTs into three product classes with a different degree of genetic...
Article
p>From 2006 through 2015, a research project on Durable Resistance in potato against Phytophthora (DuRPh) was carried out at Wageningen University and Research Centre. Its objective was to develop a proof of principle for durable resistance against late blight by cisgenesis. This public-funded project aimed at stimulating research on genetic modifi...
Technical Report
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Prospects of New Plant Breeding Techniques in crops Plant breeding has resulted in numerous high-quality food, feed, ornamental and industrial crop varieties that are cultivated nowadays. Although traditional breeding based on the steps of crossing and selection remains an ongoing activity for crop improvement, it faces limitations as many crops h...
Article
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Recent studies have shown that introduced exotic plant species may escape from their native soil-borne pathogens, but that they become exposed to increased soil pathogen activity in the new range when time since introduction increases. Other studies have shown that introduced exotic plant species become less dominant when time since introduction in...
Article
Beschrijving van een voorstel voor een concreet co-existentiemonitoringprogramma (CMP) voor suikerbiet dat is aangepast aan de specifieke gewaseigenschappen van suikerbiet. De gemaakte keuzen t.b.v. een pragmatische invulling van het voorgestelde CMP worden in de opvolgende hoofdstukken toegelicht op basis van de huidige stand van zaken in het wete...
Article
Wilde haver is een lastig te bestrijden onkruid door zijn snelle vermeerdering en levensduur van het zaad. Om vermeerdering en verspreiding te voorkomen is een teeltvoorschrift van kracht. Dit teeltvoorschrift valt met het opheffen van de productschappen onder het ministerie EZ. Dit document beschrijft het resultaat van een bureaustudie in opdracht...
Data
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1.1. The Caribbean Netherlands and biodiversity The Netherlands are signatories of the international Convention on Biological Diversity (CBD). This implies that the nation will protect biodiversity on its territory. This includes the protection of natural fauna and vegetation from negative impact caused by invasive alien species (see 2.1. for a def...
Technical Report
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This report contains the result of a research programme on four invasive aquatic macrophytes, Cabomba caroliniana (Fanwort), Hydrocotyle ranunculoides (Floating pennywort) , Myriophyllum aquaticum (Parrott’s feather) and Ludwigia grandiflora (Water primrose). The collaborative project was intended to generate a prototype decision support system for...
Article
A global challenge for the coming decades is to feed the world in a sustainable way. This will require major steps forward across the food production chain, including plant breeding, farming practices, and storage and logistics. Sustainable agriculture requires the implementation of agro-ecological and agronomic knowledge and methods in combination...
Article
The Weed Risk Assessment (WRA) has become an effective tool in predicting invasiveness of exotic plant species. In studies testing the WRA, exotic plant species are usually divided into major weeds, minor weeds and non-weeds. However, these divisions are qualitative, as the categories are assigned by experts. Many studies searching for plant traits...
Article
De casus-overkoepelende werkgroep „Voorstel Beleid en Samenwerking‟ inventariseerde de mogelijkheden om beleid in de verschillende regio‟s op elkaar af te stemmen en samenwerking te stimuleren. De resultaten van deze werkgroep staan in dit rapport. Invasieve exoten kennen geen grenzen. Daarom is het nodig dat gemeenten, provincies, regio‟s en lande...
Article
Dit rapport is het resultaat van een project waarin getracht werd de volgende onderzoeksvraag van de COGEM te beantwoorden: welke teeltveranderingen kunnen in de maritieme zone van Europa verwacht worden na een mogelijke introductie van genetisch gemodificeerde (GG) maïs, aardappel en suikerbiet?
Article
In Europa zijn vergunninghouders van genetisch gemodificeerde (gg-) gewassen verplicht om te monitoren op mogelijke onverwachte, schadelijke effecten voor mens en milieu bij import of teelt van een gg-gewas. Dit wordt ‘general surveillance’ genoemd. Deze general surveillance vindt plaats in aanvulling op de uitvoerige risicobeoordeling die is gedaa...
Article
The green peach aphid, Myzus persicae (Sulzer), is an insect pest that causes extensive damage to tobacco (Nicotiana tabacum L.) in China. Field trials were conducted in 2008 and 2009 at Longyan in the Fujian Province (China) to evaluate the effects of garlic (Allium sativum L.) as a deterrent to green peach aphids and other arthropods when intercr...
Article
Aim  To estimate invasiveness of exotic plant species, many studies have used the frequency of occurrence within a defined region. This measure is informative on how widespread exotics are, however, it does not inform on their local dominance, which is crucial for conservation of biodiversity and ecosystem functioning. The aim of the present study...
Article
Broad-leaved dock is a common and troublesome grassland weed with a wide geographic distribution. In conventional farming the weed is normally controlled by using a selective herbicide, but in organic farming manual removal is the best option to control this weed. The objective of our work was to develop a robot that can navigate a pasture, detect...
Article
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Cited By (since 1996):4, Export Date: 12 November 2013, Source: Scopus, CODEN: MCBEB, doi: 10.1007/s00248-011-9845-4, PubMed ID: 21424277, Language of Original Document: English, Correspondence Address: Overbeek, L. S.; Plant Research International BV, Wageningen University and Research Center, Droevendaalsesteeg 1, 6708 PB, Wageningen, Netherlands...
Article
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This report adresses the question whether the cultivation of genetically modified (GM) crops abroad for import in the Netherlands, as compared to the cultivation of their conventional (non-GM) counterparts, is in line with Dutch policy and societal aims striving after more sustainable forms of agriculture worldwide and the utilization of the benefi...
Article
Deze studie richt zich op genetische modificatie bij gewassen. Wereldwijd werden in 2010 op meer dan 140 miljoen hectare GG-gewassen verbouwd. Dit is ongeveer 70 maal het totale Nederlandse landbouwareaal. Het gaat met name om de handelsgewassen soja, maïs, katoen en koolzaad. Twee GG gewassen zijn ondertussern in de EU toegelaten voor teelt, namel...
Article
Toekomstige klimaatverandering kan het optreden van opslagplanten van landbouwgewassen beïnvloeden. Dit is van belang voor onkruidbestrijding in gewassen in het algemeen en voor beheersmaatregelen in veldproeven met genetisch gemodificeerde gewassen, omdat opslag een mogelijke route vormt waarlangs gewasgenen kunnen ontsnappen vanuit de cultuur. Di...
Article
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De laatste decennia kent de Nederlandse flora een sterke toename van exoten. Soorten die door een sterke uitbreiding of verdichting van hun areaal overlast veroorzaken, worden invasieve soorten genoemd. De overlast van invasieve soorten (vaak kortweg invasieven genoemd) kan bestaan uit economische schade en gezondheids- en/of veiligheidsproblemen....
Article
Deze notitie verkent welke ontwikkelingen er op het terrein van gewasbescherming en nanotechnologie plaatsvinden, perspectief hebben en gewenst zijn voor een evenwichtige incorporatie van deze nieuwe technologie. Het gebruik van nanodeeltjes biedt de mogelijkheid om zeer gericht processen te laten plaats vinden. In de EU zijn nog geen nanotoepassin...
Article
Herbicide dose optimisation, i.e. maximising weed control and crop yield with herbicide dose, is an important part of integrated weed management strategies. However, the adoption of optimised dose technology and variable rate application has been limited because of the relatively long period between herbicide treatment and the time when efficacy ca...
Article
Most studies on weed population dynamics in farming systems have focused on the effects of different weed control strategies. Those studies usually assume that farmers, operating within a particular system, have a uniform management style. However, it is likely that weed management decision making also varies between farmers that operate within a s...
Article
Kempenaar C, Lotz LAP, Snel JFH, Smutny V & Zhang HJ (2011). Predicting herbicidal plant mortality with mobile photosynthesis meters. Weed Research 51, 12–22. Herbicide dose optimisation, i.e. maximising weed control and crop yield with herbicide dose, is an important part of integrated weed management strategies. However, the adoption of optimised...
Article
A new method for application of minimum lethal herbicide dose (MLHD) rates is based on the assumption that a MLHD for a photosystem (PS) II herbicide can be predicted for weeds when the developmental stage of seedlings, herbicide uptake and herbicide action are taken into account. Chenopodium album L. combines high detoxification of metribuzin with...
Article
In 2006 startte Wageningen UR (University & Research centre) daarom in opdracht van het ministerie van Landbouw, Natuur en Voedselkwaliteit het tienjarige onderzoekproject DuRPh (Duurzame Resistentie tegen Phytophthora). In dit project worden bestaande aardappelrassen door middel van ‘cisgenese’ resistent gemaakt tegen de aardappelziekte. Daarbij b...
Article
Ridderzuring (Rumex obtusifolius L.) is een veelvoorkomend en lastig te bestrijden onkruid dat vooral biologische melkveehouders grote problemen bezorgt. Op initiatief van de sector wordt daarom een robot ontwikkeld die geheel zelfstandig ridderzuring opspoort en vernietigt.
Article
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In het algemeen kan gesteld worden dat er in de grootschalige commerciële teelten geen grote onverwachte milieueffecten van herbicidetolerante gewassen en gewassen met insectenresistentie zijn gevonden. Het is mogelijk dat bepaalde effecten pas na een periode die langer is dan 10 -15 jaar, zichtbaar worden. Tot nu toe zijn hiervoor echter geen aanw...
Article
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Smallholder farmers in southern African countries rely primarily on cultural control and hoe weeding to combat weeds, but often times, they are unable to keep up with the weeding requirements of the crop because of its laboriousness, causing them to incur major yield losses. Optimisation of crop planting pattern could help to increase yield and sup...
Article
Volunteer potato is a perennial weed that is difficult to control in crop rotations. It was our objective to build a small, low-cost robot capable of detecting volunteer potato plants in a cornfield and thus demonstrate the potential for automatic control of this weed. We used an electric toy truck as the basis for our robot. We developed a fast ro...
Article
In 2006 and 2007, field trials were performed to study the effects of the two isolation distances indicated by the Dutch Coexistence Committee, i.e., 25 m between GM (genetically modified) and conventional maize, and 250 m between GM and deliberately non-GM (e.g., organic) maize, on pollen-mediated gene flow (PMGF) under representative agricultural...
Article
Full-text available
In 2006 and 2007, field trials were performed to study the effects of the two isolation distances indicated by the Dutch Coexistence Committee, i.e., 25 m between GM (genetically modified) and conventional maize, and 250 m between GM and deliberately non-GM (e.g., organic) maize, on pollen-mediated gene flow (PMGF) under representative agricultural...
Article
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A long ongoing discussion between scientists and policy decision-makers seems to have entered recently into a new phase. The consequences of release of transgenic crops into the environment are being discussed not only by scientists but also by farmers, environmental groups and politicians, while an increasing amount of data is becoming available a...
Article
Guidelines provided by the OECD and EPPO allow the use of single-species tests performed in greenhouses to assess the risk of herbicides to non-target terrestrial plant communities in the field. The present study was undertaken to investigate the use of greenhouse data to determine effects of herbicides with a different mode of action on the biomas...
Article
van Evert FK, Polder G, van der Heijden GWAM, Kempenaar C & Lotz LAP (2009). Real-time vision-based detection of Rumex obtusifolius in grassland. Weed Research49, 164–174.SummaryRumex obtusifolius is a common grassland weed that is hard to control in a non-chemical way. The objective of our research was to automate the detection of R. obtusifolius...
Article
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Franke AC, Lotz LAP, vander Burg WJ & van Overbeek L (2009). The role of arable weed seeds for agroecosystem functioning. Weed Research49, 131–141. A literature study was conducted to gather knowledge on the impact of weed seeds on agroecosystem functioning other than effects related to the production of weed seedlings and plants. The results of th...
Article
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Soy production has rapidly expanded in Latin America in the last two decades. From 1990 to 2007, soy production increased from 16 to 61 million tonnes in Brazil and from 12 to 47 million tonnes in Argentina. Also Paraguay and Bolivia have started large-scale soy production. Soy in Latin America is primarily grown for export, with China and the EU b...
Article
Predicting which aliens will become invasive remains a challenge. Many studies have investigated whether the invaders have certain traits that make them better equipped in their introduced area compared to non-invaders. However, in tackling this question little research focussed on aspects of scale. The most invasive species are expected to perform...
Article
In dit rapport wordt een overzicht gegeven van biologische onkruidbestrijding in het algemeen, en ontwikkelingen op het gebied van biologische bestrijding van elf belangrijke exotische oever+ en wateronkruiden in Nederland in het bijzonder. De gepresenteerde informatie betreft vooral onderzoek+ en praktijkresultaten over selectieve biologische best...
Article
Broad-leaved dock (Rumex obtusifolius L.) is a common and troublesome grassland weed with a wide geographic distribution. In organic farming, the best option to control the weed is manual removal of the plants. In this report we describe the development and first tests of a robot to detect and control broad-leaved dock. An analysis of requirements...
Article
Full-text available
Precisiegewasbescherming wordt gedefinieerd als het pleksgewijs bestrijden van onkruiden, ziekten en plagen binnen een perceel of gewas al naargelang de plaatselijke behoefte door gebruik te maken van precisielandbouw-technieken. Ook pleksgewijze gewasgroeiregulatie valt hieronder. Dit rapport geeft een overzicht van ontwikkelingen en kennisvragen...
Article
Effects of population with different origin, biotype, seed size, temperature and depth of burial on the emergence of germinated seeds were investigated to assess the possibilities for successful management of triazine resistant populations of Solanum nigrum. Emergence fraction increased with temperature and decreased with increasing depth of placem...