Resource Information |
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Phytotoxicity on Dendrobiums, Hawaii, 1990 | ||
By: T. Y. Hata, A. H. Hara, and R, J. Cupples
Beaumont Agri. Res. Center, University of Hawaii-Manoa, 461 W.
Lanikaula St., Hilo, Hawaii 96720, Phone (808) 935-2885
DENDROBIUM: Dendrobium Jaquelyn Thomas
EXPERIMENTAL PROCEDURE
Phytotoxicity trials were conducted from 24 May to 25 Jul 1990 on
mature dendrobium orchid plants growing in a fiberglass
greenhouse in 1/2 in. crushed basalt rock. Five weekly
applications of insecticides were applied at the following rates:
Orthene 75SP, 1.25 lb (AI)/100 gal; Tame 2.4EC, 0.5 lb (AI)/100
gal; and a combination of Orthene 75SP, 1.25 lb (AI)/100 gal +
Tame 2.4EC, 0.5 lb (AI)/100 gal. Water was sprayed in control
plots. Insecticides were applied until runoff occurred ca 130 gpa
using a compressed air sprayer with a No. 8004 Teejet nozzle at
40 psi. Plants were observed weekly for phytotoxicity continuing
for 5 weeks after the last application. Each treatment consisted
of 18 plants replicated twice.
RESULTS
Phytoxicity was not observed on the foliage or flowers of treated
dendrobium plants.
PRECAUTIONARY STATEMENT
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.
DISCLAIMER
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.