herbicidetreatment of Solicam 80PF, Surflan 80WP,
Devrinol 50PF or Prowl 3.3EC for annual grass control.
Include 2,4-D ifseedling annual broadleaf weeds are

observed or Roundup 4SC to control established annual
or perennnial grasses and broadleaf weeds. Sinbar 80WP
is also effective for seedling weed control postemergence.
No other postemergence herbicide may be needed if no
established weeds are present and seedling weeds are
sprayed before they exceed 1 inch in height.
See table 18 for recommended herbicides for each
crop.

Orchard Sod Weed Control

Broadleaf weeds are undesirablein an orchard sod
growing between the tree rows. Competition with the
crop and mowing requirements may be increased. Many
weeds are alternate hosts for diseases, insects, and
nematode pests. The flowers of dandelion, clover,
mustard species and other weeds coincide with apple
bloom and are preferred by pollinating insects. The same
weeds, and others, may also bloom before or after the trees
bloom and attract bees into the orchard when insecticides
must be sprayed. The seedheads of dandelion clog tractor
radiators and delay other orchard maintenance operations.
Many broadleaf weeds can be controlled or suppressed
in the fall with 2,4-D applied before the weeds become
dormant for the winter. Use 1 quart of Weedar 64 per acre
or other labeled formulations (1.0 lb ae/acre 2,4-D amine).
Spray to uniformly wet the foliage of the target weeds.
Flat fan nozzles provide more uniform coverage than flood
tips and should be used to apply postemergence
herbicides. Choose a day to spray when no rain will
occur for a minimum of eight hours after application.
Clover and is difficult to control, but can be
suppressed or controlled in an orchard sod with good
management practices and herbicides. Manage fertilizer
applications to favor grass rather than the clover.
Nitrogen fertilizer stimulates grass growth, and
phosphorus and potassium stimulate clover growth in a
mixed grass and legume sod. Do not apply fertilizer
containing phosphorous or potassium to sod if clover
control is a problem. Rather apply fertilizer for tree
growth in the vegetation free strip. Mowing height also
influences the composition of a mixed grass and clover
sod. Close mowing favors the clover. Taller sod will
favor the grass. Mow no closer than four inches if clover
control is a problem in the sod.
Clover and certain other weeds, including wild onion
and garlic, can be suppressed or controlled with 2,4-D,
but good results require additional effort. The leaves of
clover are densely covered by fine hairs and wild onion
leaves are waxy and vertical. Both weeds retain spray
poorly. Add nonionic surfactant to increase wetting and
spray retention to improve control. Add the surfactant in
units of 1 quart per 100 gallons of spray solution. Check
for improved wetting after adding each quart of surfactant.
the amount of surfactant needed will depend on the
characteristics of the water used. Use the amount needed

to improve wetting. Too much or too little will reduce
control. Splitting the application by applying half the
2,4-D rate twice, about seven to fourteen days apart will
further improve the suppression or control of clover and
wild onion. Use 2,4-D in conjunction with good
fertilization and mowing practices to suppress clover on
sites where the weed is well adapted.

Preemergence Herbicides

(before weeds appear)

Devrinol (napropamide)--2 - 4 lb ai (active
ingredient)/A.Use 4 - 8 lb/A Devrinol 50DF. Apply in
late fall and/or early spring to weed-free soil, or add an
appropriate postemergence herbicide kill existing
vegetation. Use the high rate for long-term control (4 to 8
months) and the low rate for short-term control (2 to 4
months). Devrinol controls primarily annual grasses.
Tank-mix with Princep plus 2,4-D in late fall or with
Goal or reduced rates of Princep, Karmex, OR Sinbar in
the spring when labeled for the crop to control annual
broadleaf weeds. Usewhen interplantingyoung established
orchards.Labeledfor use in strawberries, tomatoes, peppers,
and eggplant.
For newly planted (nonbearing) apples, peach, pears,
plums, and cherries.
For established (bearing) apples, peaches, pears,
plums, and cherries.

Goal (oxyfluorfen)--2 lb ai/A.Use 4 qt/A Goal
2EC. Apply in early spring before bloom. Add an
appropriate postemergence herbicide to kill existing
vegetation. Goal controls annual broadleaf weeds and
suppresses annual grasses. Tank-mix with Prowl,
Devrinol, or Surflan to improve length of annual grass
control. Do NOT incorporate Goal into the soil with a
disk or other implement, or reduced weed control may
result.
For newly planted apples, peach, pears and cherries.
For established apples, peach, pears and cherries.

Karmex (diuron)--1.0 - 3 lb ai/A.Use 1.25 - 3.75
lb/A Karmex 80DF. Apply in late fall or spring to weed-
free soil, or add an appropriate postemergence herbicide to
kill existing vegetation. Primarily for annual broadleaf
weed control. Tank-mix with Prowl (nonbearing only),
Surflan, Solicam, Devrinol, OR a reduced rate of Sinbar at
one-half the labeled Karmex use rate alone for the soil type
to improve crop safety and the range of weeds controlled.
Apply to apples and pears established a minimum of 1
year and to peaches established a minimum of 3 years.
For established (bearing) apples, peaches, and pears.

1998 New Jersey Commercial Tree Fruit Production Guide

43