NC State Extension Publications

Introduction

Trade Name: Pendulum, Aquacap, Corral Common Name: pendimethalin Formulations: 2G*, 2.68G, 3.3EC, 3.8L

Uses

Preemergence control of grasses and certain broadleaf weeds in landscape plantings, field and container grown ornamentals, established Christmas trees, turf, and non-crop areas.

Amount of Active Ingredient Amount by Formulation
2G 2.68G 3.3EC 3.8L
Per Acre 2 to 4 lb 100 to 200 lb 75 to 150 lb 2.4 to 4.8 qt 2.1 to 4.2 qt
Per 1,000 sq. ft 2.3 to 4.6 lb 1.7 to 3.4 lb 1.8 to 3.6 oz 1.5 to 3 oz

Major Weeds Controlled

Annual grasses including annual bluegrass, crabgrass, barnyardgrass, foxtails, and panicum, and some annual broadleaves including spurge, bittercress, prostrate knotweed, yellow woodsorrel, chickweed, pearlwort, pigweeds, lambsquarters, and velvetleaf.

Major Weeds Not Controlled

Common groundsel, morningglory and nutsedges are not controlled. Poor or marginal control of galinsoga, nightshades, henbit and ragweed is to be expected. Emerged weeds and grasses are not controlled.

For Best Results

Apply to weed free soil. Irrigate to activate and remove granules from foliage. Apply before budbreak as growth inhibition can occur when the liquid formulations are applied over the top of ornamentals after budbreak. Apply only to established plantings. In nurseries and Christmas tree plantings, Pendulum is often combined with either Princep or Gallery to expand the spectrum of weeds controlled. The aquacap formulation (3.8L) is not recommended for use in container nursery stock.

Cautions and Precautions

Do not apply granules to wet foliage. Do not incorporate or apply directly to bare roots of woody ornamentals. Delay first application to ornamental bare-root liners for two to four weeks. Stressed plants are more susceptible to injury. With the EC formulation, a persistent yellow color can stain equipment and hardscapes. Do not use in greenhouses or other enclosed structures.

Residual Activity

Three to five months of grass control can be expected at normal use rates. Shorter residuals are to be expected in container nursery settings.

Volatility and Leaching Potential

Slight loss from the soil surface can result from photodegradation and volatility. Irrigation soon after application will limit these losses. Low water solubility and strongly adsorbed to soil organic matter and clay and, therefore, not leached.

Symptoms and Mode of Action

Inhibits root development by affecting cell division. Typical injury symptoms include swollen, stubby roots. These symptoms are most commonly seen on affected grasses. HRAC Group K1; WSSA Group 3.

Additional Information

Worker Protection Standards REI: 24 hours
PPE: coveralls, chemical resistant gloves, shoes plus socks
Manufacturer: BASF Corporation, Everris EPA Reg. # 241-341, 241-375 (Granule)

* Caution: When the product is available in more than one formulation, the formulation designated with the asterisk (*) was used as the primary source of information for this publication.

Author:

Professor of Weed Science and Extension Specialist
Horticultural Science

Publication date: Nov. 20, 2014

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