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Medientyp:
E-Artikel
Titel:
Sevin XLR Plus Block Treatment, 1993
Beteiligte:
Hogmire, Henry W.;
Winfield, Tim;
Grove, Chris;
Collins, Kate;
Jilek, Jill
Erschienen:
Oxford University Press (OUP), 1994
Erschienen in:Arthropod Management Tests
Sprache:
Englisch
DOI:
10.1093/amt/19.1.8
ISSN:
2155-9856
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>A treatment which included Sevin XLR PLUS and a standard treatment were each applied to a 1/3 acre block (6 rows × 6 trees/row) of 13-yr-old trees on M7A. Test trees measured 17 ft. in height and 13.5 ft. in width and were planted 20 X 20 ft. apart. Insecticides were applied with a Swanson DA500A airblast sprayer, at 2.4 mph applying 100 gpa. Dates of application were 27 May (first cover [ICJ), 14 Jun (second cover [2C]), 29 Jun (third cover [3C]), 15 Jul (fourth cover [4C]), 30 Jul (fifth cover [5C]), 12 Aug (sixth cover [6C]), 26 Aug (seventh cover [7C]), and 8 Sep (eighth cover [8C]). Captan and Topsin-M were applied separately to both treatments and an untreated block. Data were taken from 4 trees in the center 2 rows of each block. Control of SA was evaluated by counting aphids on the most infested leaf on each of 10 terminals from the periphery of each tree. Effect of treatments against RLH was determined by counting nymphs on 25 leaves selected from the tree periphery. ERM control was evaluated by sampling 25 leaves from the periphery of each tree, removing mites with a mite-brushing machine, and counting motile stages with a binocular microscope. Treatment effect against STLM was determined by counting mites observed on the periphery of trees during a 5 min period. Control of fruit-feeding insects was determined by scoring for injury 400 picked apples/treatment plus up to 400 drop apples/treatment sampled on 23 Sep. Picked fruit were rated for finish as 0 (no russet), 1 (enlarged and raised lenticels), 2 (1-10% russeted surface), 3 (11-25% russeted surface), 4 (26-50% russeted surface), or 5 (&gt;50% russeted surface).</jats:p>