| Material Information
||Efficacy of a non-fumigant nematicide, mocap, and three fumigant nematacides for management of Meloidogyne Javanica in a mulched watermelon crop, 1992
||IFAS NFREC Quincy research report
||3 leaves : ; 28 cm.
||Rich, J. R ( Jimmy Ray ), 1950-
Hochmuth, Robert C ( Robert Conway ), 1957-
North Florida Research and Education Center (Quincy, Fla.)
||North Florida Research and Education Center
||Place of Publication:
||Watermelons -- Diseases and pests -- Control -- Florida ( lcsh )
Watermelons -- Effect of pesticides on -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||Statement of Responsibility:
||Jimmy R. Rich, Robert C. Hochmuth.
||Research report (North Florida Research and Education Center (Quincy, Fla.)) ;
| Record Information
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 84849608
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not reflect current scientific knowledge
or recommendations. These texts
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record of the Institute for Food and
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Copyright 2005, Board of Trustees, University
APR 15 1993
University of Florida
EFFICACY OF A NON-FUMIGANT NEMATICIDE,
MOCAP, AND THREE FUMIGANT NEMATACIDES
FOR MANAGEMENT OF MELOIDOGYNE JAVANICA
IN A MULCHED WATERMELON CROP 1992
IFAS NFREC Quincy Research Report
Rt. 3 Box 4370
Quincy, FL 32351
Rt. 2 Box 2181
Live Oak, FL 32060
The Nematology program located at NFREC, Quincy conducts
research to reduce damage in crops that are important to north
Florida. Nematicide trials are a large part of this effort. The
trial reported herein was conducted at Live Oak to evaluate the
efficacy of Mocap and three fumigant nematicides to manage the
Javanese root-knot nematode in watermelon.
Materials and Methods
A field trail was conducted at the IFAS Suwannee Valley
Agricultural Research Center, Live Oak, in a Lakeland fine sand
soil (93% sand, 4% silt and 3% clay) infested with the Javanese
root-knot nematode, Meloidovgne lavanica. The field was previously
cropped to soybeans and initial population densities of M. javanica
were 263/100 cm3 soil. In early April the field was turned to 10"
deep with a mold board plow and leveled by double discing. Rows
were then bedded for later application of plastic mulch. On April
9, the fumigant nematicides, methyl bromide and Telone II, were
injected in-row to 12" deep with a single chisel. Immediately
following methyl bromide application, a 4' wide plastic mulch was
applied over this bedded treatment to form a bed 2' wide and 6"
high. The fumigant, Busan, was applied similarly but injected with
two chisels 6" apart and 12" deep. Mocap was applied to a 2' wide
band on April 15 with a CO2 pressured sprayer using a 20 gal./A of
water. Mocap was incorporated to 3-5" deep with a PTO operated
rototiller. All remaining plots were covered with the 4' wide
plastic mulch the same day.
'Crimson Sweet' watermelon seed were planted on April 16, and
spaced 36" apart in-row. The trial was arranged in a randomized
complete block design containing 6 replications. Plots were one
row, 7.5' wide and 40' long. The crop was maintained under good
cultural conditions and irrigated as needed over the season.
Marketable watermelons (> 10 lbs A) were harvested from each
plot on July 7 and fruit weights recorded. Final plant stand
counts were made at this time to calculate melon yield/plant to
standardize data. Root gall ratings were conducted on two plants
in each plot on July 9 using a gall scoring system of 0-4.
The three fumigant nematicides significantly reduced root
galling compared to the control treatment (Table 1). No
significant reduction in root galling was found among the Mocap
treatments and the control. At progressively higher rates,
however, root galling was numerically reduced by the Mocap
treatment. Fruit yield data did not indicate any significant
differences among treatments.
Although high initial population densities of M. javanica were
present, no significant yield difference was observed between the
treatments and the control (Table 1). These data may indicate the
rather short nature of this crop in days (ca. 80) thus not allowing
time for a large generational increase of the nematodes until late
in the season. If the crop had been planted earlier in cooler
soils thus slowing plant growth, more nematode damage would have
been expected. Also, cultural management of the crop was very good,
thus reducing nematode stress on the plants.
Table 1. Influence of three fumigant and one nonfumigant
nematicide on yield and root galling of watermelon in a
field trial at Live Oak, Florida, 1992.
Rate Actual Root Fruit Yield/
Treatment Materials/A Galling' Plant (lbs.)
Methyl bromide (98%) 240 lbs. 0.08 a2 23.88 a
Telone II 2.5 gal. 0.08 a 21.7 a
Busan (33%) 12 gal. 0.30 a 23.59 a
Mocap 6EC 2.0 gal. 1.20 ab 21.64 a
Mocap 6EC 1.5 gal. 1.40 ab 23.83 a
Mocap 6EC 1.0 gal. 1.40 ab 21.35 a
Mocap 6EC 0.5 gal. 1.50 ab 22.36 a
Control --- 2.70 b 20.07 a
SRoot gall ratings were on a 0-4 scale
= 76 100% of the root galled.
where 0 = no galling and 4
2 Column means followed by the same letter are not significantly
different according to the Duncan's Multiple Range Test (P >