Download or read book Toxicological Studies of the Codling Moth on Persian Walnuts written by Oscar Charles Persing and published by . This book was released on 1938 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Codling Moth in Walnuts written by Henry Josef Quayle and published by . This book was released on 1926 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Register of the University of California written by University of California (1868-1952) and published by . This book was released on 1939 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicity of Certain Organic Insecticides to Codling Moth Larvae in Laboratory Tests written by E. H. Siegler and published by . This book was released on 1939 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commencement written by University of California, Berkeley and published by . This book was released on 1939 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method and Technique for Codling Moth Toxicological Studies for Field and Laboratory Use written by United States. Bureau of Entomology and published by . This book was released on 1929 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Technical Study of Insects and Related Pests Attacking Walnuts written by Abe Ezra Michelbacher and published by . This book was released on 1958 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Codling Moth in Walnuts written by H. L. Quayle and published by . This book was released on 1926 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Doctoral Dissertations Accepted by American Universities written by and published by . This book was released on 1964 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experiment Station Record written by U.S. Office of Experiment Stations and published by . This book was released on 1937 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Codling Moth in Walnuts written by Henry J. Quayle and published by . This book was released on 1926 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experiment Station Record written by United States. Office of Experiment Stations and published by . This book was released on 1937 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commencement Programs written by University of California, Berkeley and published by . This book was released on 1933 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Dissertation Index 1861 1972 Biological sciences biology and zoology written by Xerox University Microfilms and published by . This book was released on 1973 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Codling Moth in Walnuts April Classic Reprint written by H J Quayle and published by Forgotten Books. This book was released on 2018-03-19 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Codling Moth in Walnuts April The insect undoubtedly has come to the walnut from the apple. For this reason many growers desire to remove apple trees from their dooryards; others have suggested the planting of apples among the walnut trees as a trap cr0p. We believe nothing practical can be gained by either removing the apple trees or extending their planting. 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 Detection and Characterization of Resistance to Pesticides in Codling Moth Cydia Pomonella L from Oregon written by Muhammad Arshad and published by . This book was released on 1996 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicological studies were carried out to evaluate the susceptibility of codling moth, Cydia pomonella L. to different insecticides. Bioassay procedures for adults and larvae were standardized in terms of posttreatment holding and temperature, age and sex of insects, insecticide formulations and selection of a reference strain. This study detected a low level of resistance to azinphosmethyl in codling moth from Oregon. The LD50 value of the most susceptible strain was 0.038 ug AI/moth, while that of the most resistant population was approximately 4.3 times higher as determined by the topical application method on pheromone traps. The adult topical bioassay using moths reared in the laboratory showed that two of the seven strains tested (Crippens and Medford) had 4-5 fold higher LD50 values than reference (Saint Cloud) strain. In the topical and residual studies with first instar larvae, similar but slightly lower differences were observed among the different populations. There was a strong indication of low levels of resistance in populations to diazinon and fenvalerate in topical tests applied to both males and females. However, there was no significant difference for carbaryl or endosulfan. Larval topical bioassays showed a significant difference only to diazinon. Correlation analysis suggests that a degree of cross-resistance exists between azinphosmethyl and diazinon and to some extent to fenvalerate. Codling moths exposed to the residues of diflubenzuron showed a maximum of 2-fold difference between the susceptible and resistant populations. The differences were visible in terms of egg hatch and first instar larval entries. The pupal and adult stages emerging from the treated apples exposed to ovipositing females showed insignificant sublethal effects. A strong positive correlation between the resistance to azinphosmethyl and resistance to diflubenzuron was noticed. Selection of codling moths for resistance to diflubenzuron for six generations in the laboratory decreased susceptibility by 5-fold. Application of synergists such as PBO and DEF, combined with azinphosmethyl and diflubenzuron, showed slightly different effects on all strains of codling moth. Use of PBO (a P-450 inhibiting compound) with azinphosmethyl and diflubenzuron did not change toxicity of either of the compounds. However, the combination of DEF (an esterase inhibiting compound) with the insecticides significantly increased the toxicity of azinphosmethyl and to some extent diflubenzuron. The maximum synergistic ratios obtained were 8 and 2 for azinphosmethyl and diflubenzuron, respectively. These results indicate a possible involvement of esterases in development of resistance in codling moth to azinphosmethyl and maybe to diflubenzuron. The optimal synergistic ratio determined on a resistant strain of codling moth to various combinations of azinphosmethyl and DEF was 1:4 (50 ppm of azinphosmethyl 200 ppm of DEF). The phytotoxicity studies on young apple trees showed that DEF should be used at or below 500 ppm to avoid phytotoxicity while maintaining effective control of codling moth with a reduced dose of azinphosmethyl.
Download or read book Publications written by and published by . This book was released on 1941 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
