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'oHL


Phytotoxicity of Bactericides and Fungicides
on Some Ornamentals 1994 Update
1i rs Scienc'
A. R. Chase' Library
SEP 3 ft 1994
University of Florida, IFAS, SEP 3 0 1994
Central Florida Research and Education Center Apopka
CFREC-Apopka Research Report, RH-93-13 University of Florida


a\
S5- S-
E +-CJ C o o
P >< ca a c N-
s- 5 4- E o 0 *- C) i-' *- U a c
.0 I +4 0 ( t So C -0 r t- 3 Z tor 0 Ct
S.- J) 4-- .0 0 (o 0 tO -- N (O 10 S- S-. a ( 0o
S S .,- C 0- S- QJ C) I U C C -0 S- S-. C -0
C7 o) M (0C to 0 0 tM = 0) W) 5..- >-
PLANT <
Aechmea DE S S S

Aeschynanthus DF S S S

Aglaonema S S S S S S S S S S

Aphelandra S S S S S B S

Araucaria S S S S S

Azalea S S S S S SI

Begonia C S S S S S S S S

Brassaia S G S S S D S S D S S S S A S S S

Calathea S S S S S S S

Catharanthus S S S S S

Chamaedorea S S S S S S B S S S

Chrysalidocarpus S A S S S E S S S S S S S

Cissus S S S S B

Codiaeum A S A D S

Cordyline S S S S

Dieffenbachia S S S S S S S S S S

Dizygotheca S S S

Dracaena C S S S S S S S S S S B S S S S

Epipremnum S S S S S S S S S S S S S S S S

Episcia S S S S

Euonymus S S S S

Fatsia S S S S S S

Ficus DE S S S S S S S S S


Professor of Plant Pathology, Central Florida Research and Education Center Apopka, 2807 Binion Rd.,
Apopka, FL 32703.







C -
E U +-> C\J U) 0 r0
0 S- i- L
S- 4 -' -' C E 0 ) C
-0 1 4-' 0 U S- SC 0 S r Sa M Q C
W*- L.- C) .- 4-' .- 0 rO 0 O N 0 "- S- 0 ) r
se s- c S.-s *- V U E U C C 0A S- S = C 0
PLANT C C- CC ( o tO L ) C -.- >(

Fittonia C S S S S C S S

Gerbera S S S S S

Hedera E B S S S S E S S S A S S

Hoya S S S S S S

Impatiens S S S S S S S

Maranta S S S S S S S S S S

Nephrolepis S A S S S S S S S A A S S S S S

Pelargonium S S S S S S

Peperomia S S S S S S S A S

Philodendron S S S S S S S S S S S

Pilea S S S S S S

Pittosporum S F S S S S

Polyscias S S S S S

Radermachera S S S

Rumohra S S S S S S S S

Saintpaulia H S G S S S S

Sansevieria S S S

Schlumbergera H S S S S

Spathiphyllum S S S S S S S S S S S S S S

Syngonium S S S S S S S S S S

Yucca S S S S

Squares without a letter indicate that information is not currently available. S means safely used in my tests and other letters
denote that the compound caused phytotoxicity in at least one test.


A (stunting)
B chlorosiss)
C (marginal burning)
D (distortion of new leaves)
E (necrotic spots)


F (leaf cupping and drop)
G (stunting and chlorosis)
H (chlorotic spots on flowers)
I (inhibition of rooting)


Thiophanate methyl (Topsin M and Cleary's 3336) was found safe on ageratum, chrysanthemum, coleus, hibiscus, marigold,
pansy, petunia, photinia, poinsettia, rose, snapdragon and zinnia. Mancozeb (Penncozeb) and maneb (Maneb) were not safe as a
drench on-chrysanthemum, geranium, pansy, poinsettia, snapdragon or spathiphyllum and apparently caused severe root damage
resulting in marginal leaf chlorosis and necrosis and stunting. Mancozeb and maneb were also unsafe on marigold when used as a
foliar spray and caused severe chlorosis, necrosis and distortion.