Download or read book Evaluation of Insecticides on Pear Psylla During Post harvest Period written by Arthur D. Bulla and published by . This book was released on 1982 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Insecticides for Dormant Summer and Postharvest Control of Pear Psylla in Western Colorado written by William C. Batiste and published by . This book was released on 1981 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Insecticides for Prebloom Control of Pear Psylla in Western Colorado written by William C. Batiste and published by . This book was released on 1981 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Insecticides for the Control of Pear Psylla written by Everett C. Burts and published by . This book was released on 1964 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Pear Psylla in Pears and Black Stem Borer in Apples with Trunk Injection written by Celeste Elizabeth Wheeler and published by . This book was released on 2020 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of pesticides to produce fruit crops is essential to the economic success of farmers. Consumers have a high standard for acceptable fruit, and pesticides are key to the farmer's ability to produce marketable fruit. In the past 50 years, there has been a shift towards using safer active ingredients to protect both humans and the environment. The government continues to ban unsafe, broad-use pesticides, and label new chemistries with more specific active ingredient targets. If this trend towards more responsible pesticide usage continues, there will be a need for more direct targeting of the pesticides on the crops. The most common method of pesticide application is airblast spraying. This method has huge drawbacks. It has been shown that with airblast application, less than 0.1% of pesticides applied to crops reaches its target pest. Most of the pesticide is lost to drift, leaching, and degradation by the sun, and risks exposure to non-target populations. Trunk injection should be considered as an alternative delivery method for pesticides. It delivers the pesticide directly into the tree's system without losing pesticide to drift and is contained within the tree. Trunk injection has been effectively used to control foliar pests in apple trees and wood boring pests such as the emerald ash borer. One injection can provide multiple seasons of control. In the current two studies, we use trunk injection to apply insecticides and evaluate their efficacy at controlling two very different orchard pests, the pear psylla in pear and the black stem borer in apple. The objective of the first study is to compare the efficacy of abamectin and azadirachtin in the control of pear psylla in pear using two different application methods, airblast and trunk injection. Trunk injections of abamectin and azadirachtin were compared to airblast applications of equal labeled rates on 33-year-old Bartlett Pear trees (Pyrus communis L., var "Bartlett"). The abamectin and azadirachtin trunk injected treatments controlled pear psylla as well or better than the airblast applied treatments. Trunk injecting from the first season provided a moderate level of control into the second season, one year after the injections. The objective of the second study is to evaluate the efficacy of two insecticides, emamectin benzoate and azadirachtin, and injection timing fall and spring, on their ability to control BSB in apple trees with simulated topworking and ethanol injection as an attractant.

Download or read book Melanderia written by and published by . This book was released on 1983 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Analysis of Pear Psylla Populations 1977 79 Classic Reprint written by Robert Eaton Fye and published by Forgotten Books. This book was released on 2018-03-18 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from An Analysis of Pear Psylla Populations, 1977-79 In 1978, the control programs of grower 4 showed the effectiveness of strong early season control of pear psylla (fig. However, in late July an application of amitraz was required. In the absence of additional applications, the survivors initiated large late - season populations. Predator pressures in late season were low due to the lack of a major reservoir (in an adjacent un sprayed area) to furnish the initiating populations. In 1979, the early p0pula tions of immatures were reduced by insecticide applications (fig. But the survivors of the summer insecticide applications initiated a large potential population of overwintering adults in late fall. The predators were decimated by the insecticide applications and never recovered. The data demonstrate the rapid recovery of pear psylla populations when small numbers survive insecticide applications. The necessity for miticide applications indicated some weakness in the early season control or a reservoir of mites for reinfestation of the trees. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Download or read book Pesticides Documentation Bulletin written by and published by . This book was released on 1968 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monitoring Pesticide Resistance in Psylla Pyricola Foerster from Western Oregon Pear Orchards written by Peter A. Follett and published by . This book was released on 1984 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modified slide-dip bioassay was used to survey and establish baseline resistance levels in Psylla pyricola Foerster from western Oregon orchards to four pesticides. Orchards selected in the Hood River, Rogue River and Willamette Valleys spanned a wide range of environmental and management conditions. During the study period of 1982-1983, management conditions present at these sites included intensively sprayed, minimally sprayed (IPM), recently abandoned, and long abandoned orchards. Lethal concentration (LC50) values determined for psylla populations ranged from 0.31-12.64 g AI/1 for azinphosmethyl, 0.14-1.73 g AI/1 for endosulfan, 0.02-0.10 ml AI/1 for fenvalerate, and 0.41-1.52 ml AI/1 for Perthane. Pear psylla from all orchards showed some level of resistance to azinphosmethyl (12- to 41-fold) and endosulfan (2- to 12-fold) when compared to the susceptible OSU Entomology Farm strain. Comparative differences in susceptibility among populations to fenvalerate and Perthane, calculated by comparing each strain to the most suceptible strain, were between 1- and 5-fold. Resistance was not correlated with insecticide usage in individual orchards in the Hood River and Rogue River Valleys, where commercial pear production is intensive. Psylla from unmanaged orchards had similar or slightly higher LC50 values than managed trees for each compound. In contrast, in the Willamette Valley, where pear production is much less intensive and orchards are widely scattered, psylla resistance levels were better correlated with local insecticide usage patterns. Pairwise comparisons of mean LC50 values for a region indicated that psylla resistance levels were significantly different at the regional level for azinphosmethyl and endosulfan. The mean LC50 value for Rogue River Valley populations to azinphosmethyl of 9.00 g AI/1 was significantly higher (p

Download or read book Pear Pest Management written by and published by Agriculture & Natural Resources. This book was released on 1978 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1983 with total page 2330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Report of the Agricultural Research Institute of Ontario written by Agricultural Research Institute of Ontario and published by . This book was released on with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of the Commissioner of Agriculture and Arts written by Ontario. Department of Agriculture and published by . This book was released on 1969 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Integrated Management of Diseases and Insect Pests of Tree Fruit written by Michelle Fountain and published by Burleigh Dodds Series in Agric. This book was released on 2019-08-20 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the light of increasing restrictions on pesticides, this collection reviews advances in understanding key diseases and insect pests of tree fruit. It shows how this understanding can be used to improve integrated disease and pest management techniques.

Download or read book Report of the Proceedings of the Annual Meeting of the Washington State Horticultural Association written by Washington State Horticultural Association and published by . This book was released on 1958 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book California Pear Research Reports written by and published by . This book was released on 1997 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report of the Agricultural Research Institute of Ontario written by Agricultural Research Institute of Ontario and published by . This book was released on 1968 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt: