| bacterial symbionts in the sugar beet root maggot, tetanops myopaeformis (von röder). | aerobic heterotrophic and facultative anaerobic bacteria were isolated from all developmental stages of the sugar beet root maggot, tetanops myopaeformis (von röder). two distinct bacterial symbiotic relationships were observed. serratia liquefaciens and serratia marcescens were found to be associated with all developmental stages. bacterial symbiont transmission occurred from one generation to the next. symbionts were transferred from the male reproductive system to the female reproductive syst ... | 1984 | 16346457 |
| discovery of fusarium solani as a naturally occurring pathogen of sugarbeet root maggot (diptera: ulidiidae) pupae: prevalence and baseline susceptibility. | the fungus fusarium solani (mart.) sacc. was discovered as a native entomopathogen of the sugarbeet root maggot, tetanops myopaeformis (röder), in the red river valley of north dakota during the 2004 sugarbeet production season. this is the first report of a native pathogen affecting the pupal stage of t. myopaeformis. forty-four percent of larvae collected from a field site near st. thomas (pembina co.) in northeastern north dakota during may and june of 2004 were infected with the entomopathog ... | 2008 | 17662996 |
| production of microsclerotia of the fungal entomopathogen metarhizium anisopliae and their potential for use as a biocontrol agent for soil-inhabiting insects. | microsclerotia (ms), overwintering structures produced by many plant pathogenic fungi, have not been described for metarhizium anisopliae. three strains of m. anisopliae--f52, tm109, and ma1200--formed ms in shake flask cultures using media with varying carbon concentrations and carbon-to-nitrogen (c:n) ratios. under the conditions of this study, all strains produced ms, compact hyphal aggregates that become pigmented with culture age, in addition to more typical blastospores and mycelia. while ... | 2009 | 19358886 |
| effects of steam-distilled shoot extract of tagetes minuta (asterales: asteraceae) and entomopathogenic fungi on larval tetanops myopaeformis. | interactions of a biopesticidal formulation of steam distilled shoot extract of mexican marigold, tagetes minuta, and entomopathogenic fungi were evaluated for management of the sugarbeet root maggot, tetanops myopaeformis (röder). shoot extract plus surfactant (e-z mulse) (=t. minuta oil) was used in a 65:35 ratio to test the hypothesis that this fungicidal and nematocidal biopesticide causes dose-dependent mortality and developmental arrest of t. myopaeformis but does not interfere with the ac ... | 2010 | 20550813 |
| oat cover cropping and soil insecticides in an integrated sugarbeet root maggot (diptera: otitidae) management program. | sugarbeet, beta vulgaris l., producers occasionally establish cereal cover crops to minimize early-season soil erosion, wind abrasion, and mechanical injury of seedlings. we evaluated the use of living oat, avena sativa l., cover cropping as a cultural tactic to minimize feeding injury from sugarbeet root maggot, tetanops myopaeformis (röder), larvae at five field sites during 1996, 1998, and 1999. sweep-net sampling yielded 4.8-, 11.2-, and 7.2-fold more flies from oat cover-cropped chlorpyrifo ... | 2003 | 14650515 |
| transcriptome analysis of sugar beet root maggot (tetanops myopaeformis) genes modulated by the beta vulgaris host. | sugar beet root maggot (sbrm, tetanops myopaeformis von röder) is a major but poorly understood insect pest of sugar beet (beta vulgaris l.). the molecular mechanisms underlying plant defense responses are well documented, however, little information is available about complementary mechanisms for insect adaptive responses to overcome host resistance. to date, no studies have been published on sbrm gene expression profiling. suppressive subtractive hybridization (ssh) generated more than 300 sbr ... | 2016 | 27696738 |
| insect feeding-induced differential expression of beta vulgaris root genes and their regulation by defense-associated signals. | root responses to insect pests are an area of plant defense research that lacks much information. we have identified more than 150 sugar beet root ests enriched for genes responding to sugar beet root maggot feeding from both moderately resistant, f1016, and susceptible, f1010, genotypes using suppressive subtractive hybridization. the largest number of identified f1016 genes grouped into the defense/stress response (28%) and secondary metabolism (10%) categories with a polyphenol oxidase gene, ... | 2007 | 16858553 |
| aggregation behavior and a putative aggregation pheromone in sugar beet root maggot flies (diptera: ulidiidae). | male-biased aggregations of sugar beet root maggot, tetanops myopaeformis (röder) (diptera: ulidiidae), flies were observed on utility poles near sugar beet (beta vulgaris l. [chenopodiaceae]) fields in southern idaho; this contrasts with the approximately equal sex ratio typically observed within fields. peak observation of mating pairs coincided with peak diurnal abundance of flies. volatiles released by individual male and female flies were sampled from 08:00 to 24:00 hours in the laboratory ... | 2017 | 28423428 |
| internal lipids of sugarbeet root maggot (tetanops myopaeformis) larvae: effects of multi-year cold storage. | sugarbeet root maggots, tetanops myopaeformis (diptera, ulidiidae), survive more than five years of laboratory cold (6 degrees c) storage as mature third-instar larvae. to quantify energy costs associated with prolonged storage, internal lipids of larvae stored for 1, 2, 3, and 5 years were compared and characterized with those of field-collected diapausing larvae. internal lipid concentration was highest (21.8% wet wt. and 29.8% dry wt.) in diapausing larvae. lipids decreased progressively over ... | 2010 | 20580676 |
| multi-year survival of sugarbeet root maggot (tetanops myopaeformis) larvae in cold storage. | to test the hypothesis that long-term survival of sugarbeet root maggot in storage is facilitated by larvae undergoing prolonged diapause, respiration and gene expression patterns of field-collected diapausing larvae were compared with those of 1-, 2-, and 5-year laboratory-stored larvae. additional assessments were made on post-storage survival, emergence, and reproductive fitness of stored larvae. respirometry, carried out at 5 and 20 degrees c revealed no differences among respiration rates o ... | 2008 | 18346755 |
| susceptibility of the colorado potato beetle and the sugarbeet wireworm to steinernema feltiae and s. glaseri. | in laboratory tests, larvae of the colorado potato beetle (cpb), leptinotarsa decemlineata (say), and the sugarbeet wireworm (sbw), limonius californicus (mannerheim), were exposed to the nematodes steinernema feltiae filipjev (mexican strain) (= neoaplectana carpocapsae) and s. glaseri steiner in soil. s. feltiae caused significantly higher mortality in sbw larvae than did s. glaseri, but both nematode species were equally effective against cpb larvae. the minimum concentration of s. feltiae fo ... | 1983 | 19295854 |
| a new method of preparing insects for scanning electron microscopy. | acidified 2,2-dimethoxypropane (dmp), used as an alternative to regular fixation and dehydration methods for insects, was found to be the only successful means of preparing the sugarbeet root maggot larva, tetanops myopaeformis (röder) (diptera:otitidae), for the scanning electron microscope. no morphological changes were evident when dmp treated sugarbeet root maggot adults were compared to fresh (unfixed) adults and glutaraldehyde-osmium tetroxide fixed adults. the method has been used with su ... | 1979 | 90409 |