Phytotoxicity on Chrysanthemums, Hawaii, 1987

T. Y. Hata, A. H. Hara
1988 Arthropod Management Tests  
Phytotoxicity trials were conducted from 23 Jun to 18 Aug on 'Eclipse,' 'Envy,' Tridon,' 'Yellow Mandalay,' and 'Splendor' chrysanthemums. Cuttings were planted in 5-inch-diam pots containing 3 parts peat, 1 part vermiculite, 1 part perlite. Chrysanthemums were fertilized and maintained by commercial growers' standard practice. Pots were arranged in a randomized complete block with 9 pots/treatment and 3 blocks/cultivar. Insecticides were applied at twice the recommended rate 7 days after
more » ... ng on 23 Jun and continued at weekly intervals until full bloom on 18 Aug. A total of 9 applications of selected insecticides were made at the following rates: Danitol 2.4EC, 0.6 lb (AI)/100 gal, Tempo 2EC, 0.125 lb (AI)/100 gal; Talstar 10WP, 0.2 lb (AI)/100 gal; and Carzol 92SP, 0.92 lb (AI)/100 gal. Treatments were applied using a compressedair sprayer with a 2503 Teejet nozzle at 40 psi. Plants were observed weekly for any abnormalities as compared to control plants.
doi:10.1093/iat/13.1.346a fatcat:rohd7ic5sbd7pgmnax7icyozwi