Resource Information

Phytotoxicity on Anthurium, Hawaii, 1992  

By: T.Y. Hata and A.H. Hara

Beaumont Agri Res Center, University of Hawaii-Manoa, 46 1 W. Lanikaula Street, Hilo, Hawaii 96720, Phone (808) 935-2885.

ANTHURIUM: Anthurium andraeanum Andre

Phytotoxicity trials were conducted from 5 Nov 91 through 28 Jan 1992. Mature plants growing in volcanic cinder media in 7.6 liter bags under 80% polypropylene shade cloth were used in study 1. Plants in study 2 were grown in a fiberglass greehouse using the same cultural practices as study 1. In both studies, experimental plots measured 1.8 by 1.8 m with 18 plants per treatment. Both NTN 0.5G and NTN 240F were evaluated in study 1. Only NTN 0.5G was evaluated in study 2. Treatments in study 1 consisted of eight weekly foliar applications of NTN 240F (33893) at a rate of 0.03 g AI/liter applied to runoff using a compressed air sprayer with an 8004 Teejet nozzle at 276 KPa. In both studies 1 and 2, NTN 0.5G (33893) was applied once at a rate of 0.12 g AI/7.6 liter pot and watered immediately after treatment. Plants were observed for phytotoxicity weekly continuing for 5 weeks after the last application.


In study 1, phytotoxicity was not observed with both formulations of NTN on the following anthurium cultivars: 'Ozaki', 'Kaumana', 'Marian Seefurth', 'Mauna Kea', 'Seapearl', and 'Nitta'. In study 2, NTN 0.5G was nonphytotoxic on the following cultivars: 'Rudolph', 'Alii', 'Tropic Ice', 'Misty Pink', 'Blushing Bride', 'UH931', 'UH780', and 'UH1003'.


Use pesticides safely. Follow the pesticide label. Consult with the Cooperative Extension Service or the Hawai'i State Department of Agriculture for authorized special local need registrations or additional information. The user is responsible for the proper use, application, storage, and disposal of pesticides.

Reference to a company or product name does not imply approval or recommendation of the product by the College of Tropical Agriculture and Human Resources, Cooperative Extension Service University of Hawaii, or the United State Department of Agriculture and does not imply its approval to the exclusion of other products that may be suitable. All materials should be used in accordance with label instructions or manufacturer's directions.

Product Name: NTN 33893 0.5%G
Manufacturer's Name: Miles Inc.
Address: P.O. Box 4913, 8400 Hawthorn Road Kansas City, MO 64120
Composition: imidacloprid 0.5%G

Product Name: NTN 33893 240F
Manufacturer's Name: Miles Inc.
Address: P.O. Box 4913, 8400 Hawthorn Road Kansas City, MO 64120
Composition: imidacloprid 2.0 lb active per gallon