Evaluation of Insecticides for Thrips Control on Cotton
| Author | : Clifford Myron Beckham |
| Publisher | : |
| Total Pages | : 15 |
| Release | : 1967 |
| Genre | : Cotton |
| ISBN | : |
Evaluation Of Insecticides For Thrips Control On Cotton
Download Evaluation Of Insecticides For Thrips Control On Cotton full books in PDF, epub, and Kindle. Read online free Evaluation Of Insecticides For Thrips Control On Cotton ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Insect Pests of Cotton
| Author | : G. A. Matthews |
| Publisher | : Oxford University Press, USA |
| Total Pages | : 624 |
| Release | : 1994 |
| Genre | : Science |
| ISBN | : |
The cotton plant; Insects and mites; Pest management.
Potential Interactions of Early Season Herbicides and Insecticides in Cotton
| Author | : Derek Lane Clarkson |
| Publisher | : |
| Total Pages | : 132 |
| Release | : 2014 |
| Genre | : Cotton |
| ISBN | : 9781303950803 |
Cotton growth early in the season is affected by damaging levels of thrips in many production fields in Arkansas. During this time, insecticides used to control thrips and herbicides used to control weeds are often present at the same time on the cotton plant. This research explores how various combinations of herbicides and insecticides influence thrips numbers and cotton plant growth parameters early in the growing season. Pathways evaluated included interactions between preemergence herbicides and insecticide seed treatments and interactions between common tank-mixed foliar herbicides and selected foliar insecticides. No interactions in thrips control or plant growth were observed when using preemergence herbicides in combination with insecticide seed treatments. However, efficacy varied between chosen insecticide seed treatments and it may be concluded that in this experiment imidacloprid seed treatments exhibited greater control of thrips numbers than thiamethoxam seed treatments. There were isolated herbicide-insecticide interactions affecting plant growth parameters, but overall the co-application of tested herbicides and insecticides offer cotton producers the ability to integrate thrips and weed control without loss of thrips efficacy or negative impact on plant growth. Herbicide-insecticide interactions examined in this study suggested that pesticide combinations present on the cotton plant simultaneously, early in the season, have no significant interaction which may affect thrips control and early season cotton plant growth.
Evaluation of a New Bt Toxin, Cry51Aa2.834_16, for Control of Thrips and Tarnished Plant Bug in Cotton
| Author | : Scott Hester Graham |
| Publisher | : |
| Total Pages | : 125 |
| Release | : 2018 |
| Genre | : Bacillus thuringiensis |
| ISBN | : |
Field experiments done in 2016 and 2017 in Tennessee evaluated the effects of a Bt toxin, Cry51Aa2.834_16, on the management of thrips (Thysanoptera: Thripidae) and tarnished plant bug (TPB), Lygus lineolaris (Palisot De Beauvois), in cotton. For thrips, the Bt trait was as good or better than an insecticide-based approach. The Bt trait reduced numbers of immature TPB and provided partial plant protection from TPB injury. The Bt cotton had greater yields than non-Bt cotton when insecticides were not used. The Bt cotton required fewer insecticide applications to provide adequate plant protection from TPB than the non-Bt cotton. Current treatment thresholds for TPB performed similarly for Bt and non-Bt cotton. Insecticide applications for TPB increased fiber quality, while the Bt trait had minor effects. Other experiments done in 2016 and 2017 evaluated the behavioral response of thrips and TPB to Bt Cry51Aa2.834_16. Adult thrips avoided Bt cotton in field choice tests and in a test of cotton not treated with insecticides. In a greenhouse choice test more adult thrips and eggs were found on non-Bt cotton than Bt cotton. Similarly, in a field test of Bt and non-Bt cotton not treated with insecticides, 68% of adult thrips were collected on non-Bt cotton. The Bt trait did not affect the distribution of TPB within the canopy of cotton not sprayed with insecticides, although more square and flower injury was caused by TPB in non-Bt cotton. Adult TPB avoided diet containing Bt leaves and excised Bt squares in choice tests with non-Bt squares. Field experiments were conducted in 2017 and 2018 in Tennessee to determine if an image analysis tool, Canopeo (Oklahoma State University, Stillwater, OK), can be used to supplement current methods to estimate cotton seedling health in small-plot research. Small plot replicated tests analyzed showed a range of cotton seedling health. Cotton seedlings were visually rated for vigor and thrips injury and above ground biomass samples were also taken. A photograph of the center two rows of each plot was taken using Canopeo. Strong correlations were observed for Canopeo and biomass, Canopeo and vigor, and thrips injury ratings and biomass.
Evaluation of the Rainfastness of Selected Insecticides in Cotton
| Author | : Sara Inez Barrett |
| Publisher | : |
| Total Pages | : 86 |
| Release | : 2021 |
| Genre | : |
| ISBN | : |
Rainfastness of insecticides is an understudied aspect of agricultural research. Little is known about the residual of commonly used products for key pests of cotton, as well as their residual after a rainfall event. This project was designed to evaluate the impact of rainfall on the performance of commonly used insecticides for tobacco thrips, Frankliniella fusca (Hinds); tarnished plant bug, Lygus lineolaris (Palisot de Beauvois); and bollworm, Helicoverpa zea (Boddie), management in cotton. Laboratory and field experiments suggest that rainfall occurring within 16 hours after application had a negative impact on the performance of most insecticides. Chemical analyses of leaf tissue using a mass spectrometer confirmed what was observed with field and laboratory experiments. Although direct comparisons between insecticides cannot be made, results from this study suggest that spinosyns and insect growth regulators appeared to have the longest residual after a rainfall event.
Lethal and Sub-lethal Effects of Selected Synthetic Insecticides on Two Cotton Thrips Pests
| Author | : Jonathan A. Janis |
| Publisher | : ProQuest |
| Total Pages | : |
| Release | : 2008 |
| Genre | : Cotton |
| ISBN | : 9780549926924 |
Early season thrips damage to cotton can reduce yield and kill plant terminals. Control measures and the compounds used to control thrips vary widely. Thrips species, such as onion thrips, Thrips tabaci Lindman and western flower thrips, Frankliniella occidentalis (Pergande), are major contributors to the agricultural crop pest spectrum on numerous crops. The persistence of these two species as crop pests has led to the delineation of species-specific tactics for insecticidal control measures. The primary objective of this research was to characterize and compare attributes of five insecticides in different classes: anthranilic diamide (352-DPX), microcyclic lactone (spinosad, Tracer® 4 SC), neonicotinoid (thiomethoxam, Cruiser® 40 WG), carbamate (oxamyl, Vydate® L) and organophosphate (acephate, Orthene® 90 S) with thrips activity. Insecticidal potency, feeding/oviposition preference, reproductive effects and feeding damage were studied on T. tabaci and F. occidentalis . Adult potency data (LC50 or dose response mortality of each compound) showed that all compounds were more potent on T. tabaci than F. occidentalis . 352-DPX was 3823X less potent on F. occidentalis, followed by Orthene (411X), Vydate L (11X), and Tracer and Centric both with 6X lower potency on F. occidentalis . Results from the feeding and oviposition preference and reproductive effects bioassay indicated that adult T. tabaci and F. occidentalis tended to be equally distributed between treated and untreated leaves. Some exceptions are discussed where significantly more adults thrips were found on the untreated than treated leaves. The feeding and oviposition preference results indicate that in spite of the significantly lower potency on F. occidentalis, leaves treated with all compounds were less preferred over untreated leaves for feeding and oviposition, resulting in significantly lower larvae and feeding damage. Interestingly, only 352-DPX, Tracer and Vydate had this same effect on T. tabaci . Additional results indicate that sublethal concentrations (e.g. LC10 and LC50) had an effect on feeding and progeny reduction. Finally, treated leaves resulted in lower percent plant damage, caused feeding cessation, and subsequently influenced larval populations. An improved population assessment for thrips management and plant protection was developed based on these findings.
Thrips Biology and Management
| Author | : Bruce L. Parker |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 606 |
| Release | : 2013-11-11 |
| Genre | : Science |
| ISBN | : 1489914099 |
Thrips (fhysanoptera) are very small insects, widespread throughout the world with a preponderance of tropical species, many temperate ones, and even a few living in arctic regions. Of the approximately 5,000 species so far identified, only a few hundred are crop pests, causing serious damage or transmitting diseases to growing crops and harvestable produce in most countries. Their fringed wings confer a natural ability to disperse widely, blown by the wind. Their minute size and cryptic behavior make them difficult to detect either in the field or in fresh vegetation transported during international trade of vegetables, fruit and ornamental flowers. Many species have now spread from their original natural habitats and hosts to favorable new environments where they often reproduce rapidly to develop intense damaging infestations that are costly to control. Over the past decade there have been several spectacular examples of this. The western flower thrips has expanded its range from the North American continent to Europe, Australia and South Africa. Thrips palmi has spread from its presumed origin, the island of Sumatra, to the coast of Florida, and threatens to extend its distribution throughout North and South America. Pear thrips, a known orchard pest of Europe and the western United States and Canada has recently become a major defoliator of hardwood trees in Vermont and the neighboring states. Local outbreaks of other species are also becoming problems in field and glasshouse crops as the effectiveness of insecticides against them decline.
