In:
Insecticide and Acaricide Tests, Oxford University Press (OUP), Vol. 5, No. 1 ( 1980-01-01), p. 29-29
Abstract:
Several insecticides were evaluated for their miticidal properties in a seasonal control program conducted at the Hudson Valley Laboratory orchards. In addition an experimental mificide, UC 55248, was applied at tight cluster (Apr 23) and again on Jul 12 and evaluated along with other treatments. With the exception of UC 55248, all treatments were applied at petal fall (May 15) and in six cover sprays May 29, Jun 14, 28, Jul 12, 26, and Aug 13. Treatments were applied dilute to run-off using 4 . 2 gal spray/tree or 403 gal/acre. Each treatment was applied to eight-tree plots of 5 to 7 different apple cultivars on the EM2 rootstock replicated 3 times in a randomized complete block design. Trees were ca. 12 ft high and spaced 15 × 30 ft. Additional sprays applied for disease control over the entire block included: Difolatan 4F 5 gal/acre Apr 19 and Cyprex 65W 2lb/acre Jun 1 . Pest mite population pressure was very great with over 61 ERM and 300 ARM/leaf in the check by Jul 5 . Above normal temperatures and below normal rainfall during the month of Jul contributed to the high mite populations. Because of the high mite populations present, Plicfran 50W 4 oz formulation/100 gal was combined with the Ambush, Lorsban, Penncap, Guthion, Pirimor, Diazinon, and Pounce treatments and applied on the Jul 12 cover spray. Mites were evaluated Jun 8, Jul 5, 20, and Aug 20 by collecting 25 Red Delicious leaves/tree from each replicate. The leaves were brushed with a mite brushing machine and all mite stages counted under a binocular scope.
Type of Medium:
Online Resource
ISSN:
0276-3656
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
1980
detail.hit.zdb_id:
2048862-2
