Download or read book Studies of the Control of the Onion Thrips Thrips Tabaci Lindeman written by William Howard Ewart and published by . This book was released on 1941 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Biology and Control of the Onion Thrips Thrips Tabaci Lindeman in Orange County New York written by Frank Bradshaw Maughan and published by . This book was released on 1936 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of the Onion Thrips Thrips Tabaci Lindeman written by Frank Hurlbut Chittenden and published by . This book was released on 1920 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation on Onion Thrips Thrips Tabaci Lindeman Thysanoptera Thripidae written by SHAHANAWAZ K and published by . This book was released on 2003 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Onion Thrips written by J. Wilcox and published by . This book was released on 1954 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of the Onion Thrips written by Frank Hurlbut Chittenden and published by . This book was released on 1919 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Identifying Weed Species Hosts for Onion Thrips Thrips Tabaci Lindeman and Their Potential as Sources of Iris Yellow Spot Virus Bunyaviridae Tospovirus in New York Onion Fields written by Erik A. Smith and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), is a pest of onion crops and other Allium spp. worldwide and is the only known vector of Iris yellow spot virus (IYSV) (Bunyaviridae: Tospovirus), a yieldreducing pathogen infecting onion. IYSV was first detected in New York onion fields in 2006 and has since been found throughout all of the major onion producing regions in the state. Recent studies in New York have shown that IYSV can reduce bulb size, suggesting that this disease may cause serious economic losses for the onion industry. Sources of IYSV in New York onion fields have only recently become better understood. IYSV may be annually introduced via transplanted onions imported from AZ, where the virus is established. IYSV also may be established in New York and bridge seasons through volunteer onion p lants and winter-annual, biennial and perennial weeds near onion fields. However, weed species that may be important in the epidemiology of IYSV in onion fields are not known. T. tabaci can only acquire IYSV as first instars. Therefore, a weed can only be a source for IYSV if it is also a host for immature T. tabaci. Because weed hosts that would support larval populations of T. tabaci were not known for the Great Lakes region of North America including New York, the main purpose of this research was to identify weed species that supported populations of T. tabaci larvae. In 2008 and 2009, common weed species and T. tabaci larvae were sampled from spring through early fall in the Elba Muck onion-growing region in western New York, the second largest onion growing region in the state. Ninety-eight weed species were sampled and 30 had at least one T. tabaci larva. A total of 2,121 T. tabaci larvae were found on weeds sampled in 2008 and 2009; 17% of the weed species were members of Asteraceae and 20% were in the Brassicaceae. Most of the larvae (90%) were found on species of these two families. Because IYSV is thought to be non-transmissible by seed, winterannual, biennial and perennial weed species have the ability to act as overwintering reservoirs for IYSV in onion cropping systems. Thus, these types of weed species may likely be the most important sources for this virus. Of the 30 weed species hosting T. tabaci larvae, 25 were winter-annual, biennial and perennial weeds. Of these, only four are confirmed hosts of IYSV: common burdock, Arctium minus, chicory, Cichorium intybus, curly dock, Rumex crispus, and dandelion, Taraxacum officinale. Among these four species, plant densities and populations of T. tabaci larvae were highest on common burdock and dandelion, suggesting that these weed species may have the greatest potential to impact the epidemiology of IYSV in New York onion fields. Densities of T. tabaci larvae were estimated to be 3,536 and 3,851 larvae per hectare on common burdock in 2008 and 2009, respectively, whereas densities were estimated to be 4,720 and 24,964 larvae per hectare on dandelion in 2008 and 2009, respectively. Larvae were only observed on curly dock in 2008 (3 larvae per hectare) and on chicory in 2009 (143 larvae per hectare). In a separate field survey in the fall of 2009, populations of T. tabaci larvae were highest on common burdock and dandelion plants adjacent to onion fields (0-50 m), whereas no larvae were observed on these weed species farther than 5 km from onion fields. Samples of common burdock and dandelion did not test positive for IYSV; however, the relative localization of T. tabaci populations suggests that management of these weed species near onion fields in an effort to reduce the number of viruliferous T. tabaci that may colonize onion fields warrants further investigation. In addition to IYSV, there are other important viruses of vegetable crops grown in muck soils. Survey results covering the presence of these weed species in the Elba Muck are presented and discussed.

Download or read book Resistance to Onion Thrips Thrips Tabaci Lindeman and Incidence of Iris Yellow Spot Virus in Onions written by John Diaz Montano and published by . This book was released on 2011 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological and Morphological Aspects of the Onion Thrips Thrips Tabaci Lindeman 1889 Species Complex written by Saranda Musa and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on the Efficacy of Some Botanical and Chemical Insecticides Against Thrips Thrips Tabaci Lindeman on Onion With CD Copy written by and published by . This book was released on 2015 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Patterns of Dispersal Activity of Onion Thrips Thrips Tabaci Lindeman in Onion Ecosystems written by Erik A Smith and published by . This book was released on 2016 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Onion thrips, Thrips tabaci Lindeman, is an important agricultural pest worldwide. T. tabaci damages crops by feeding on leaves and by transmitting plant pathogens, including Iris yellow spot virus (Bunyaviridae: Tospovirus) (IYSV). T. tabaci and IYSV are perennial problems for New York's onion industry, and research is needed to improve our understanding about T. tabaci biology, ecology and IYSV epidemiology for developing better management programs. This dissertation examines the patterns of T. tabaci dispersal and colonization of onion crops. Clear sticky card traps and trap-equipped unmanned aerial vehicles (UAVs) were used to monitor the seasonal dispersal patterns of T. tabaci and IYSV. Most T. tabaci were captured below 2 m, while an average of 4% were captured above 2 m. Viruliferous T. tabaci were captured with both card traps and UAVs, and proportions increased through the growing season each year. T. tabaci dispersal activity below 6 m was observed to effectively cease at nightfall, while highest densities were observed during the evening crepuscular period. T. tabaci dispersal activity and temperature tended to be positively correlated, while negative correlations were observed with wind speed. Commercial onion fields were sampled in three onion growing regions to identify the effect of adjacent habitat on patterns of T. tabaci colonization of onion fields. Early-season densities of adult T. tabaci were not affected by adjacent habitat in 7 of 9 cases, while edge effects were observed in 4 of 9 cases. Late-season densities were greater in onion fields adjacent to senescing onion fields, and densities in these fields were observed to decrease with increasing distance into the onion fields. These results strongly suggest that T. tabaci engage in both short- and longrange dispersal during the onion growing season, and that late-season dispersal likely contributes to the spread of IYSV. Abiotic factors such as daylight, diel cycle, temperature, wind speed and atmospheric pressure determine when T. tabaci flight is likely to occur. Early-season colonization of onion fields occurs relatively uniformly in onion crops, while senescing crops are likely the source of adult T. tabaci colonizing adjacent, non-senescing fields late in the season, prior to harvest.

Download or read book Development of an IPM System for Onion Thrips Thrips Tabaci Lindeman as a Pest of Bulb Onions written by Saleh Abdullah Aldosari and published by . This book was released on 1995 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Onion Thrips Thrips Tabaci Lindeman Pest Relationships written by Deborah Marie Kendall and published by . This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Dynamics and Insecticide Resistance of Onion Thrips Thrips Tabaci Lindeman Thysanoptera Thripidae in Onions written by Jody Lynn Gangloff and published by . This book was released on 1999 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae) is a worldwide pest of onions and other crops. In New York it is an annual threat to the commercial onion industry where populations are managed with regular applications of insecticides. Two peaks of flight activity occurred during the period when T. tabaci infest onions in New York. These flights were composed of both female and males of this species, as well as a smaller number of other species. On-plant populations consisted of both female and male T. tabaci but no other species of thrips. Numbers of thrips on onion plants increased steadily through the growing season, exceeding the economic threshold of three thrips per leaf by mid to late summer in most fields. During the period of population increase, and especially during peaks of flight activity, airborne thrips were captured in equal numbers on traps placed throughout onion fields. Peaks of flight activity and proportions of T. tabaci of all thrips captured in onions did not correspond with peaks, harvest or ratio of thrips captured in neighboring field and forage crops, although T. tabaci was found to be a dominant species in areas outside onion fields. Sexually reproducing strains of T. tabaci were collected from onion fields. These were found to be highly resistant to pyrethroids, including l -cyhalothrin. By contrast, T. tabaci collected in areas adjacent to onions, such as alfalfa fields, reproduced asexually and had low resistance to l -cyhalothrin. It was concluded that neighboring field and forage crops are not the most significant source of T. tabaci that invade onion fields each year and become hard to manage in New York. High levels of insecticide resistance indicate that a resistance management plan and the promotion of integrated pest management in New York's onion industry should be high priorities in the near future.

Download or read book Population Dynamics and Insecticide Resistance of Onion Thrips Thrips Tabaci Lindeman Thysanoptera Thripidae in Onions written by Jody Lynn Gangloff-Kaufmann and published by . This book was released on 1999 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Dynamics Insecticide Resistance and Management of Onion Thrips Thrips Tabaci Lindeman in Southwestern Ontario microform written by Jennifer Kathleen MacIntyre Allen and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on Crop Loss by Thrips Tabaci Lindeman thysanoptera thripidae Its Chemical Control and the Dissipation of Monocrotophos and Dimethoate in Onion written by S. Srinivasan and published by . This book was released on 1982 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: