Resource Information |
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Phytotoxicity on Dendrobiums, Hawaii, 1991 | ||
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 3 May to 28 July 1991 on
mature dendrobium orchid plants grown 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 (CC17228), 0.5 lb (AI)/100 gal;
and a combination of Orthene 75SP, 1.25 lb (AI)/100 gal; Tame
2.4EC (CC17228), 0.5 lb (AI)/100 gal. Water was sprayed in
control plots. Insecticides were applied until runoff (ca. 130
gpa) using a compressed air sprayer with a 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
Phytotoxicity 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.