Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

CONTROL OF THE SILVERLEAF WHITEFLY ON CANTALOUPE IN WEST-CENTRAL FLORIDA, FALL 2001

CONTROL OF THE SILVERLEAF WHITEFLY ON CANTALOUPE IN WEST-CENTRAL FLORIDA, FALL 2001 (E15) CANTALOUPE: Cucurbita melo L., 'Athena' CONTROL OF THE SILVERLEAF WHITEFLY ON CANTALOUPE IN WEST-CENTRAL FLORIDA, FALL 2001 David J. Schuster Gulf Coast Res. & Educ. Ctr. 5007 60th St. E. Bradenton, FL 34203 Tel: 941-751-7636 Fax: 941-751-7639 dschuster@mail.ifas.ufl.edu Silverleaf whitefly (SLWF): Bemisia argentifolii (Bellows & Perring) Plots were seeded 27 Sep, 24-inches apart within the row on 8-inch-high and 32-inch-wide beds of EauGallie fine sand covered with white polyethylene mulch. Each plot consisted of a single 20-ft long row with rows on 5-ft centers. Treatments were replicated four times in a completely randomized design. Soil applications of Admire were made in 4 oz per plant of water on 28 Sep. Foliar treatments were applied with a 2.5 gal, hand-held CO -powered sprayer at 100 gpa on 23 Nov and 3 Dec for the Knack and Applaud only treatments and on 3 Dec for the Knack following Admire treatment. The sprayer was fitted with a D-5 disk and no. 45 core and was operated at 60 psi. The numbers of second to fourth instar whitefly nymphs were counted on each of four, 3.5 cm leaf disks per each of 10 leaves per plot on 14 (second leaf from terminal), 28 (third or fourth leaf from terminal) 12 Nov and 20 Dec (eighth leaf from plant base). The silverleaf whitefly population was moderate during the trial. The number of nymphs on plots treated at transplanting with Admire were below the threshold of 0.1 per cm until about 9 wk after treatment. The number of nymphs was significantly lower on plots sprayed only with Applaud relative to the number on check plots approximately 1 wk after the second application, whereas the number of nymphs on plots sprayed only with Knack was not significantly different until about 2 wk after the second application. A single application of Knack following Admire did not result in a reduced number of nymphs relative to the check even after about 2 wk following the application. No evidence of phytotoxicity was apparent with any treatment. This research was supported in part by the Florida Agricultural Experiment Station, and is approved as Journal Series No. N-02324. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CONTROL OF THE SILVERLEAF WHITEFLY ON CANTALOUPE IN WEST-CENTRAL FLORIDA, FALL 2001

Arthropod Management Tests , Volume 28 (1) – Jan 1, 2003

Loading next page...
 
/lp/oxford-university-press/control-of-the-silverleaf-whitefly-on-cantaloupe-in-west-central-r0eV93kyYU
Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/28.1.E15
Publisher site
See Article on Publisher Site

Abstract

(E15) CANTALOUPE: Cucurbita melo L., 'Athena' CONTROL OF THE SILVERLEAF WHITEFLY ON CANTALOUPE IN WEST-CENTRAL FLORIDA, FALL 2001 David J. Schuster Gulf Coast Res. & Educ. Ctr. 5007 60th St. E. Bradenton, FL 34203 Tel: 941-751-7636 Fax: 941-751-7639 dschuster@mail.ifas.ufl.edu Silverleaf whitefly (SLWF): Bemisia argentifolii (Bellows & Perring) Plots were seeded 27 Sep, 24-inches apart within the row on 8-inch-high and 32-inch-wide beds of EauGallie fine sand covered with white polyethylene mulch. Each plot consisted of a single 20-ft long row with rows on 5-ft centers. Treatments were replicated four times in a completely randomized design. Soil applications of Admire were made in 4 oz per plant of water on 28 Sep. Foliar treatments were applied with a 2.5 gal, hand-held CO -powered sprayer at 100 gpa on 23 Nov and 3 Dec for the Knack and Applaud only treatments and on 3 Dec for the Knack following Admire treatment. The sprayer was fitted with a D-5 disk and no. 45 core and was operated at 60 psi. The numbers of second to fourth instar whitefly nymphs were counted on each of four, 3.5 cm leaf disks per each of 10 leaves per plot on 14 (second leaf from terminal), 28 (third or fourth leaf from terminal) 12 Nov and 20 Dec (eighth leaf from plant base). The silverleaf whitefly population was moderate during the trial. The number of nymphs on plots treated at transplanting with Admire were below the threshold of 0.1 per cm until about 9 wk after treatment. The number of nymphs was significantly lower on plots sprayed only with Applaud relative to the number on check plots approximately 1 wk after the second application, whereas the number of nymphs on plots sprayed only with Knack was not significantly different until about 2 wk after the second application. A single application of Knack following Admire did not result in a reduced number of nymphs relative to the check even after about 2 wk following the application. No evidence of phytotoxicity was apparent with any treatment. This research was supported in part by the Florida Agricultural Experiment Station, and is approved as Journal Series No. N-02324.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2003

There are no references for this article.