Population growth rate of dry bulb mite, Aceria tulipae (Acariformes: Eriophyidae), on agriculturally important plants and implications for its taxonomic status

Dry bulb mite (DBM), Aceria tulipae, is an economically important mite with a worldwide distribution and a broad host range. As a generalist, it is the most important eriophyoid mite attacking bulbous plants such as garlic, onion and tulip. To date, DBM has been recorded on host plants belonging to the families Liliaceae, Amaryllidaceae, Melanthiaceae and Asparagaceae. However, a precise understanding of DBM host range is lacking as it is largely based on casual records of mites on plants, some of which may include accidental hosts. Moreover, the possible existence of cryptic species has not been considered. In this study the hypothesis that DBM may be a complex of distinct genetic lineages or cryptic species was tested by comparing the common barcode sequence marker mtDNA COI of specimens from several populations originating from the Netherlands and Poland. The population growth rate of DBM on seven agriculturally important plant species and on various parts of the garlic plant was also experimentally assessed in the laboratory. The results did not support the first hypothesis, and indicated that DBM populations originating from Poland and the Netherlands shared essentially the same genome. In addition, they indicated that DBM reached the highest population growth rate on leek and also displayed high growth rates on garlic, chive and red onion, whereas white onion and wheat were not colonized by the mites. Answering the question of whether DBM is a single polyphagous species rather than a complex of cryptic lineages is of particular importance since the misidentification of pests may lead to ineffective control strategies. Moreover, improved knowledge of DBM host range is essential for assessing risk to crops

Population growth rate of dry bulb mite, \u3ci\u3eAceria tulipae\u3c/i\u3e (Acariformes: Eriophyidae), on agriculturally important plants and implications for its taxonomic status

Dry bulb mite (DBM), Aceria tulipae, is an economically important mite with a worldwide distribution and a broad host range. As a generalist, it is the most important eriophyoid mite attacking bulbous plants such as garlic, onion and tulip. To date, DBM has been recorded on host plants belonging to the families Liliaceae, Amaryllidaceae, Melanthiaceae and Asparagaceae. However, a precise understanding of DBM host range is lacking as it is largely based on casual records of mites on plants, some of which may include accidental hosts. Moreover, the possible existence of cryptic species has not been considered. In this study the hypothesis that DBM may be a complex of distinct genetic lineages or cryptic species was tested by comparing the common barcode sequence marker mtDNA COI of specimens from several populations originating from the Netherlands and Poland. The population growth rate of DBM on seven agriculturally important plant species and on various parts of the garlic plant was also experimentally assessed in the laboratory. The results did not support the first hypothesis, and indicated that DBM populations originating from Poland and the Netherlands shared essentially the same genome. In addition, they indicated that DBM reached the highest population growth rate on leek and also displayed high growth rates on garlic, chive and red onion, whereas white onion and wheat were not colonized by the mites. Answering the question of whether DBM is a single polyphagous species rather than a complex of cryptic lineages is of particular importance since the misidentification of pests may lead to ineffective control strategies. Moreover, improved knowledge of DBM host range is essential for assessing risk to crops

Data from: Thermal niches of wheat curl mite, Aceria tosichella (Acari: Eriophyidae): congruence between physiological and geographical distribution data

Filename: parm.csv Population growth rate of the two wheat curl mite (WCM) lineages reared in different temperatures. lineage - mitochondrial lineage (MT-1 or MT-8) temp - the rearing temperature (ºC) n - no. of replications of the experiment r, r.lower, r.upper - estimated intrinsic population growth rate and its 95% confidence intervals Filename: aceria.csv Data on field sampling localities, WCM abundance and thermal niche suitabiity. julian - Julian date x, y - geodetic coordinates (EPSG: 2180) stems - no. of stems collected MT1, MT8- mitochondrial lineage (MT-1 or MT-8) TNS1, TNS8 - thermal niche suitability for lineage

The Austrian avant-garde literature in the 1960' on the examples of Peter Handke and Wolfgang Bauer

Austrian avant-garde literature is nowadays considered an integral part of German literary history. Focusing on the avant-garde's early stage of the 1960s, the thesis seeks to look into (a) the conditions which gave rise to the progressive literature in the Austria of that time, and (b) its concrete manifestations in the works of the young authors. The opening part explains the origins of such a radical approach to form and content across literary genres. After 1945, Austrian culture and arts did not face the uncertain choice of literature in Germany, where another parting of the ways came in 1947, with the fundamentally different approaches between the West and the East. In Austria the initial debate was more efficient: the official policies clearly aimed at re-establishment of the modern and stable values as presented by the Austrian interwar great story-tellers such as Robert Musil and Hermann Broch. These efforts, however, were soon to become counterproductive. The conservative, and cumbersomely obsolete policies of the grand coalition between the social democratic SPÖ party and the newly established ÖVP party failed to provide fertile land for young authors, who grew up in the 1960s. It was these authors in particular who felt that the cultural and political atmosphere was extremely rigid, and that the..

The area of Poland divided to 367 strata.

<p>Smaller squares were selected randomly within agrarian landscapes for plant sampling.</p

Estimated parameters and standard errors (SE) of Briere growth curves (<i>a</i> and <i>m</i>) for <i>Aceria tosichella</i> lineages MT-1 and MT-8.

<p>Estimated parameters and standard errors (SE) of Briere growth curves (<i>a</i> and <i>m</i>) for <i>Aceria tosichella</i> lineages MT-1 and MT-8.</p

Parameter estimates of the hurdle model for <i>Aceria tosichella</i> lineage MT-1 relating the observed abundance (truncated negative binomial distribution with log link) and prevalence (binomial distribution with logit link) to thermal niche suitability (TNS).

<p>Parameter estimates of the hurdle model for <i>Aceria tosichella</i> lineage MT-1 relating the observed abundance (truncated negative binomial distribution with log link) and prevalence (binomial distribution with logit link) to thermal niche suitability (TNS).</p

Spatial variation in intrinsic growth rate for <i>Aceria tosichella</i> lineage MT-8, predicted from fundamental thermal niche using mean monthly temperatures.

<p>Spatial variation in intrinsic growth rate for <i>Aceria tosichella</i> lineage MT-8, predicted from fundamental thermal niche using mean monthly temperatures.</p

Relationship between temperature and population growth rate for <i>Aceria tosichella</i> lineage MT-1.

<p>Vertical dashed lines denote temperature ranges within which the population increases in numbers. Shaded region represents standard error band.</p