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Copyright 2005, Board of Trustees, University
of Florida

c i ) University of Florida
S 0 AGRICULTURAL RESEARCH AND EDUCATION CENTER
Sanford, Florida

Research Report SAN 83-3 f ..S. Ui. Augus~t1982

SNAP BEAN NEMATICIDE TRIAL

H. L. Rhoades

Snap beans are produced primarily on fine sand type soils in Florida
where they are attacked by several plant nematode species. Particularly
important are the sting nematode, Belonolaimus longicaudatus, and the
root-knot nematodes, Meloidogyne, app. In the fall of 1981, a nematicide
trial was conducted at AREC-Sanford on Myakka fine sand infested with
sting, stubby-root (Paratrichodorus christiei) and lance (Hoplolaimus
galeatus) nematodes. It was designed to compare the efficacy of the soil
fumigant Soilbrom 90 (EDB) with several organophosphorus and carbamate
nematicides. The experimental design was randomized complete block with
five replicates. Plot size was 5 feet (2 rows) X 38 feet. The nematicides
involved in the test were:

1. Soilbrom 90 (EDB), Great Lakes Chemical Corporation
2. Nemacur (fenamiphos), MOBAY Chemical Corporation
3. Furadan (carbofuran), FMC Corporation
4. Counter (terbufos), American Cyanamid Company
5. Mocap (ethoprop), Rhone-Poulenc, Inc.
S6. Vydate (oxamyl), E.I. DuPont de Nemours & Co., Inc.
7. Temik (aldicarb), Union Carbide
8. RH 9358 (experimental) Rohm and Haas Company

The soil fumigant, EDB, was injected 6 inches deep in-the-row with
a single chisel on September 24, 1981. The nonfumigant nematicides were
all applied as granules in 10-inch bands in-the-row between the planting
shoe and press wheel during the planting process on September 28.
'Contender' was the variety of snap beans planted. On October 3, dinoseb
and alachlor herbicides were sprayed broadcast at 3 and 2 lb ai/acre,
respectively. Cultural practices were normal for central Florida. A
herbicide injury rating was made on October 6; a stand count was made on
October 27; soil samples were taken for nematode population determination
on November 18; and the beans were harvested on November 19.

The results are presented in Table 1. Plant injury (apparently
from the herbicides) was much more severe on plots treated with Vydate,
Temik, and RH 9358. Injury consisted of leaf burn and dying of plants
and as a result yields were much less for these treatments. EDB appeared
to be somewhat phytotoxic when applied only 4 days before planting and caused
some reduction in stand. All of the nematicides reduced sting nematodes,
but EDB was the most effective followed by Temik and Nemacur. Populations
of stubby-root nematodes were too low to cause injury, but as has been
noted many times in the past, a high population returned rapidly following
use of a soil fumigant, EDB in this case. Only EDB appeared to be effective
for reducing lance nematode populations. Treatments increasing yields
significantly were Nemacur, Counter, and Mocap, all at 2 lb ai/acre.

Table 1. Effect of nematicides on snap bean growth and yield.

Treatment

Check

EDB

Nemacur

Furadan

Counter

Mocap

Vydate
I'

Temik

RH 9358

LSD .05

1,

Rate/ Herbicide
A injurya

-1.2

.5 gal 1.6

2 Ib a.i. 1.6
3 1.2

2 1.8
3 1.6

2 1.8
3 1.9

2 1.0
3 1.4

2 2.7
3 2.7

2 3.0
3 3.9

2 3.9

0.9

Stand
count

52

39

50
49

42
43

47
54

48
53

45
31

32
27

10

14

Nematode populationsc
Sting Stubby-root Lance

154 29 201

2 145 32

40 13 96
53 16 237

124 16 48
90 25 152

103 10 86
70 17 81

70 15 308
108 13 111

121 17 289
98 10 144

32 1 90
33 12 221

22 11 252

aased on an index of 1, no injury, to

bNumber of plants in 15 feet of row.

Average number of nematodes extracted

5, all plants dead.

from 100 cc of soil.

Yield
bu/A

139

179

221
199

166
191

201
180

214
177

142
81

75
73

15

62

I

.

* .