Download or read book A Preliminary Report on the Clover Aphis and Methods for Its Control written by Ralph H. Smith and published by . This book was released on 1918 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Clover Aphis written by Ralph H. Smith and published by . This book was released on 1923 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Abundance Distribution and Migration of the Clover Aphid Nearctaphis Bakeri Cowen in Red Clover written by Amy J. Dreves and published by . This book was released on 1990 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four sampling techniques were evaluated to estimate clover aphid, Nearctaphis bakeri (Cowen), abundance in red clover fields in the Willamette Valley. The Berlese funnel method detected one to four times more aphids than other sampling techniques. Visual assessment often underestimated the high aphid densities during the flowering and seeding of clover. Sweep net and Schuh shaker techniques had limitations and underrated the numbers of aphids present in the clover fields. Strong correlations (r2 = 0. 74 - 0.87) were found between the Berlese funnel technique and visual assessment technique in a 2nd year established field. Numerical differences in the spatial distribution of N. bakeri on clover stems were shown during various stages of plant development over the season. During development of buds and axils, aphid numbers on the lower half of the plant averaged 1.5 times greater than those on the upper half. As the season progressed into the flowering and seeding stage, aphid numbers on the upper stem halves were approximately five times greater than those on the lower half. Winged clover aphids were too few to show definite peaks of flight using water traps, averaging 2.19 aphids per yellow bucket during the June-August period. No significant differences in aphid attractiveness to the different colors were found among water pan traps. Yellow buckets captured approximately five times more alate aphids than did yellow, red, or green pan traps. Traps placed on the south side of the field contained higher numbers of aphids than in other locations in the red clover fields.
Download or read book Insects Injurious to Clover and Alfalfa written by Justus Watson Folsom and published by . This book was released on 1908 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Insect Pests of Clover and Alfalfa written by Justus Watson Folsom and published by . This book was released on 1909 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sources of Resistance to Sweet clover Aphid in Introduced Species of Melilotus with List of Literature Cited written by and published by . This book was released on 1963 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insects of the Clover Field written by G. C. Davis and published by . This book was released on 1894 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resistance of Strains of Red Clover to Pea aphid Injury written by Howard Herman Jewett and published by . This book was released on 1941 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Yellow Clover Aphid on Alfalfa written by and published by . This book was released on 1955 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biology and Control of Red Clover Insects in Michigan written by Willet Theodore Van Velzen and published by . This book was released on 1960 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cooperative Economic Insect Report written by United States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs and published by . This book was released on 1965 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Germ Cell of Aphids written by Nettie Maria Stevens and published by . This book was released on 1906 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cooperative Economic Insect Report written by and published by . This book was released on 1965 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Insect Pest Survey Bulletin written by and published by . This book was released on with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report on the Noxious and Beneficial Insects of the State of Illinois written by and published by . This book was released on 1909 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report on the Noxious and Beneficial Insects of the State of Illinois written by Illinois. State Entomologist and published by . This book was released on 1909 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the State Entomologist on the Noxious and Beneficial Insects of the State of Illinois written by and published by . This book was released on 1908 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
