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Cornell Cooperative Extension

Suffolk County

  • Agriculture
  • Community Education
  • Gardening
  • Horticulture Labs
  • Marine
  • Energy
  • County Farm
  • 4-H
  • Peconic Dunes
  • Recursos en Español
Preparing your lawnmower for winter

Your lawn will do best if maintained at a height of 3 inches.

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  • IPM Factsheets
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IPM Factsheets

Our Integrated Pest Management Factsheets provide answers to common questions about animal, insect, or disease pest problems. Additional information can be obtained by contacting one of the IPM Pest Management Technicians at 631-727-7850.

resource pic

'Alpha-Gal' Syndrome

Tick bites blamed for causing an allergic reaction to meat consumption.

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moth

QwikPest

A guide to help you quickly identify what’s going on in your yard.

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mosquito - no

Mistaken Identities

Check out this fact sheet about insects commonly mistaken for mosquitoes.

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Boxwood Guide

Boxwood Guide

This guide is a diagnostic tool for nursery growers and landscape professionals and serves as a starting point to become familiar with common problems that affect boxwood on Long Island.

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tick crawling on a persons arm

BE TICK WISE!

It is possible to contract a tick borne disease and not know you were even bitten. This flyer informs you what to look for.

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Huechera Sugar Plum

LI Horticulture Resource Guide

Our annual guide featuring useful information for nursery growers and landscape professionals.

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Last updated March 29, 2017

IPM Factsheets

  • Athletic Fields
  • Diagnosis
  • Evergreen
  • Fertilizer
  • General Plant Info
  • Insects
  • Installation and Maintenance
  • IPM
  • Irrigation
  • Misc. Pests
  • Non-Living Plant Injury
  • Poisonous Plants
  • Safety and Equipment
  • Soil, Mulch, Compost
  • Specific Plant Choice
  • Specific Plant Situation
  • Trees
  • Turf
  • Useful Math and Charts
  • Weeds and Moss

Events

    fertilizing the water
  • Suffolk County Fertilizer Turf Management Course
    Friday, June 13
    9:00 AM - 12:00 PM
  • NY Soil Health Field Day: Biochar, Compost and Building climate resiliency
    Tuesday, July 22
    4:00 PM - 6:00 PM
  • NY Soil Health Field Day: Día de Campo sobre la salud de Suelo: Recorrido a la fincadel Centro de Investigación
    Thursday, July 24
    4:00 PM - 6:00 PM

See more

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Cornell Cooperative Extension
Suffolk County

Extension Education Center
423 Griffing Avenue, Suite 100
Riverhead, New York 11901-3071
TEL: 631-727-7850
suffolk@cornell.edu
Hours: 8:30am-4:30pm

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