Syngenta, OHP Offer New Greenhouse Pest Controls

Eastern Tent Caterpillar

Eastern tent caterpillar. Photo: Mississippi State University Extension Service

The U.S. EPA recently approved Acelepryn insecticide from Syngenta for use in ornamental greenhouses. Powered by the active ingredient chlorantraniliprole, Acelepryn provides long-lasting control of Japanese beetles, sawfly larvae, and leaf-feeding caterpillars, including eastern tent caterpillars, fall webworm, and bagworms.


“Leaf-feeding insects like Japanese beetles can quickly spread and skeletonize crops in nursery production, so residual control is imperative,” says Nancy Rechcigl, Technical Services Manager for Ornamentals at Syngenta. “When applied as a foliar spray, Acelepryn protects the leaves of plants from Japanese beetles and lepidopteran pests for up to four weeks. It offers targeted control, so pollinators and other beneficial organisms are not affected and integrated pest management programs are not disrupted.”

With its novel mode of action, Acelepryn offers an alternative for growers looking for newer chemistries to add to their program. Additional benefits include:

  • Four-hour REI (restricted-entry interval) reduces disruptions to work schedules
  • Minimal personal protective equipment is required, compared to alternative products that require a respirator for early entry
  • No known adverse effects on beneficial and non-target organisms, such as bees and biological control agents

“The combination of strong efficacy, long residual as a foliar spray and very low impact to non-target organisms is a unique combination,” says Daniel Potter, Ph.D., Professor of Entomology at the University of Kentucky. “Acelepryn controls a lot of important chewing pests, giving you the flexibility of not having to apply it over and over again.”

In addition to foliar sprays, Acelepryn can be applied as a bark treatment to protect from pests such as clearwing borers, as a drench to control white grubs, or as a systemic soil treatment to prevent lace bugs, aphids, and birch leafminers. Acelepryn is also approved for use on ornamental plants in exterior landscapes and interior plantscapes.

OHP Introduces New Herbicide

OHP, Inc. has introduced Fuerte Herbicide, a unique pre-emergent combination granular product that controls broadleaf and grassy weeds in field, container, and landscape ornamentals.

Fuerte provides residual weed control of many common and difficult-to-control weeds such as oxalis, spurge, and elicpta on trees, shrubs, conifers, and landscape ornamentals without harming desirable plant material.

“The dual active ingredients in Fuerte are natural partners that have a proven track record for excellent weed control and overall plant tolerance,” says Dave Barcel, OHP Senior Technical Manager. “Fuerte offers the strength needed for weed control in the tough summer months.”

The two active ingredients – flumioxazin and prodiamine – are widely known, and Fuerte marks the first combination of the two.

“Flumioxazin is active on many broadleaf weed and some grasses. Prodiamine is active on many grassy weeds and some broadleaf weeds. It’s a great fit,” Barcel says.

Formulated on an engineered granule, Fuerte produces virtually no dust and low odor, resulting in improved worker safety and ease of application.