Apple, Miticide Evaluation Experiment, 1978

Abstract

Abstract All acaricide treatments and the water control were applied in a manner to duplicate the alternate-row application technique employed by many commercial growers. A Swanson airblast sprayer, calibrated to deliver 25 gal/acre (94.64 liter/ha) at 100 psi (7.03 kg/cm2) at a ground speed of 2 mph (3.22 km/hr) when spraying one side of the row, was used to apply all materials on each spray date. Each plot consisted of a single row of 35 trees of 8-yr-old Red Del icious. Samples for the Plictran standard included in the tables were taken from similar adjacent trees in the remainder of the 4-acre block. Four subsamples of 25 leaves collected from each of 4 trees, spaced evenly along the treatment row were collected in plastic bags, placed in an ice chest, and taken to the laboratory where they were brushed following the Henderson-McBurnie method. Counts of European red mites, European red mite eggs, and Apple rust mites were recorded. Two applicationsweremade, the first on Jul 16 to the south side ofthe row and the second on Jul 28 to the north side. Countswere madeon Jul 15, 18, 25, 28, and 29. Data are presented as percent change between the two counting dates indicated in each table. The average number of mites or mite eggs is also included to give relevance to the percentages. No phytotoxic effects were noted.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.