The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
site maintained by the Florida
Cooperative Extension Service.
Copyright 2005, Board of Trustees, University
/ UNIVERSITY OF FLORIDA
e5s 714 INSTITUTE OF FOOD AND AGRICULTURAL SCIENCES
AGRICULTURAL RESEARCH AND EDUCATION CENTER
BRADENTON, FLORIDA r
j3505 \ 0
Mimeo Report GCS71-2 Ja ~S l.9-
PESTICIDES FOR COMMERCIAL CUT FLOWER CROPS
S. L. Poe
Assistant Piroessor (Assistant Entomologist)
During the past year several new and some old chemicals have bebn used on
cut flowers and screened against lepidb6terous larvae, aphids, thrips, and mites.
The following report summarizing the results is given for information only and
should not be considered a recommendation, Mention of trade names or commercial
companies should not be considered an endorsementi The materials, form rate,
crops and pests evaluated are the following:
1. Azodrin(R) 3.2E; (Shell Chemical Company). Used at 0.5 lb aihg (active
ingredient per 100 gallons water) Azodrin has given good control of green peach
aphids, flower thrips and southern armyworms. It possessed miticidal properties
and was compatible with Daconil(R) and Benlate (R). No observable injury was
found on foliage or flowers of 'Pink Friendship', 'White Friendship', 'Valeria',
'T-590' and 'Beverly Ann' gladiolus after use. It caused no injury on 'Iceland',
'Iceberg', 'Shasta', 'Snow Crystal', 'Nob Hill' and several other varieties of
chrysanthemum treated. Slight injury occurred on 'Mrs. Roy' and 'Inferno' foliage
when used in a regular spray program.
2. Bacillus thuringensis (Berl.) a biological pathogen of certain lepidop-
terous larvae including loopers, diamond back moths and imported cabbage worms.
Several formulations of Bacillus are available including:
Biotrol 25W (Thompson-Hayward Chemical Company),
Dipel 25W (6000 WP) (Amdal, Abbott Laboratories), and
Thuricide HP 30% (International Minerals and Chemical Company).
These new wettable formulations possess good activity against loopers at
low rates, 0.25 to 0.50 lb aihg. No phytotoxicity has been noted on any variety
of gladiolus, chrysanthemum, snapdragon or aster foliage or flowers treated.
3. Carzol(R) SP soluble salt carbamate (Nor-Am Chemical Company). Carzol
was developed as an acaricide for citrus mites. This compound is effective at
0.5 to 1.0 lb aihg for two spotted spidermites on roses. Its use on chrysan-
themum resulted in foliar injury to two varieties, 'Ping Pong' and 'Polaris',
and flower injury to 'Nob Hill', 'Deep Ridge' and 'Marguerita'.
4. Fundal(R) SP (Nor-Am Chemical Company) or Galecron(R) SP (Ciba Chemical
Company). This product has shown considerable activity as an ovicide for mite
and lepidopterous moth eggs. It is effective at 0.5 to 1.0 lb aihg for lepidop-
terous larvae and mites on roses. Use on young chrysanthemums has resulted in
injury to more than a dozen varieties. However, after flowers are showing color,
this compound at 0.5 lb aihg caused no foliar or flower injury to any of several
cultivars. No damage has been associated with Fundal (= Galecron) on gladiolus.
5. Furadan(R) WP, F (Niagara Chemical Company) a carbamate nematicide also
has insecticide properties. Its use on gladiolus corms as a dip caused no ob-
servable injury. As a systemic for spider mites the nematicide rate applied
to soil was not effective. This compound was phytotoxic to 'Deep Ridge' and
'Mandalay' chrysanthemums grown in pots.
6. Gardona(R) WP (Shell Chemical Company), a phosphatic compound, was de-
veloped for use against lepidopterous larvae. It is registered for use against
sweet corn pests and shows good activity against small larvae of loopers, beet
and southern armyworms and corn earworms on gladiolus. No injury occurred at
0.5 to 0.75 lb aihg to chrysanthemums. Gardona is a relatively safe material
to warm blooded animals.
7. Lannate(R) W (DuPont Chemical Company) is registered for use on sweet
corn, tomatoes, ornamentals, flowers and other crops. Although phytotoxicity
has been observed, the availability and quick action of this carbamate has led
to extensive use on gladiolus, chrysanthemums and other flowers for lepidop-
terous larvae. Lannate is effective at 0.25 to 0.5 Ib aihg and very rapidly
kills pests on contact. Foliage and flower toxicity from Lannate has been
noted on nearly twenty varieties of chrysanthemums. Its major use has been
8. Imidan(R) WP, (Stauffer Chemical Company), a phosphatic developed for
insects and mites of deciduous fruits appeared safe when used on foliage but
caused injury to flowers of several cultivars of chrysanthemum at 1.0 Ib aihg.
9. Monitor(R) S (Chevron Chemical Company), another phosphate compound
with excellent activity against aphids, leafminers, and loopers. Its use on
'Iceland' and 'Snow Crystal' chrysanthemums gave good control of leafminers
and green peach aphids at 0.5 lb aihg but with some phytotoxicity to the
10. Mytrol(R) EC (Thompson-Hayward Chemical Company) was developed as a
miticide. When used at 0.5 lb aihg for spider mites on chrysanthemums, thi2
chemical caused flower injury to 'Yellow Delaware' and slight foliage injury
to other varieties.
11. Omite(R) W (UniRoyal Chemical Company), a phosphate compound effective
for spider mites on several crops. It has been used on chrysanthemum, carnation
and roses at 0.5 Ib aihg and caused no plant injury. Open flowers of two chry-
santhemum cultivars were slightly injured by this compound. It is unsafe to
use on Poinsettia.
12. Plictran(R) W (Dow Chemical Company), a Tricyclohexyltin material was
developed for mite control on deciduous fruit. Highly effective at 0.25 lb aihg
on spider mites on non-flowering chrysanthemum and roses. It caused severe phy-
totoxicity on open blooms of chrysanthemums. Four poinsettia cultivars were
also sensitive to Plictran.
13. Phosvel(R) W (Velsicol Chemical Company), a phosphate material for
larvae control of loopers, armyworms and other lepidopterous species. Phosvcl
is effective at 1.0 lb aihg on chrysanthemum and gladiolus. It was used safely
on open blooms of 10 chrysanthemum cultivars at high rates (4.0 lb aihg).
14. Pyrenone(R) L (Niagara Chemical Company), a pyrethrin compound regis-
tered for use on flower and ornamental crops. Pests controlled include most
species of aphids, bugs, leafhoppers and first instar moth larvae. Green peach
aphid survived treatments at 6 oz/100 gal. It is safe to use on foliage and
flowers and is also available mixed with Thiodan 2E. The latter material is
effective and safe for use on chrysanthemum and gladiolus for aphid control.