Influence of Adjuvants and Spray Timing of Movento on Aphid Contamination and Crop Injury in Baby Spinach
2011
Palumbo, John C.
Movento (spirotetramat), a new tetramic acid derivative insecticide, has shown to provide excellent activity against sucking insects through acropetal and basipetal systemic activity following foliar application on some vegetable crops. Studies conducted from 2007-2010 clearly showed that the addition of a penetrating adjuvant (i.e., Dyne-Amic) with Movento sprays significantly enhanced its efficacy against green peach aphid in baby spinach and prevented aphid contamination on marketable spinach plants. Aliette, a systemic fungicide, also significantly enhanced aphid control when combined with Movento. In the absence of a penetrating adjuvant, Movento sprays did not provide commercially acceptable control of green peach aphids in spinach, regardless of spray timing. Addition of other spray additives commonly used in spinach production did not significantly enhance Movento's aphicidal activity. Trials in 2009 and 2010 suggested that a single spray application of Movento with Dyne-Amic on older spinach plants (4-leaf stage) provided control comparable with the same mixture applied twice on smaller (2- and 4-leaf stages). Although growers are generally reluctant to apply oil-based chemicals on baby spinach crops due to risk of crop injury, no phytotocixity was observed with application of Movento/Dyne-Amic mixtures in any of the trials.
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