Welcome Back!

Now a new season starts for scouting and alerting you to potential insect pest and disease issues in field crops across the state. This page will have a little bit of a different view this year. HAVE A LOOK!!

Black cutworm and True armyworm

There has been intense catches for black cutworm and true armyworm with our field corn pheromone trapping network in western NY. If you view the live map of our current catches you can see what each location has been caught across the state. For management information on both insect pests please view the following management information.

Black Cutworm Information

https://cals.cornell.edu/field-crops/corn/insects-corn/cutworms

Black Cutworm Adult-Photo was taken by Jaime Cummings-Syngenta

True Armyworm Information

https://cals.cornell.edu/field-crops/corn/insects-corn/armyworms

Live NYS Map of Pheromone Trapping Moth Counts



Black Cutworm Degree Day Accumulations from March 1 to May 5

*Location for Intense Catches	Black Cutworm (Base 50)	Life Stage
Seneca Falls April 26	93	Laying Eggs

*Intense Catch is over 15 moths in a week.

True Armyworm Degree Day Accumulations from March 1 to May 5

*Location for Intense Catches	True Armyworm (Base 50)	Life Stage
Seneca Falls April 26 29 Moths Caught	93	Laying Eggs

*Intense Catch is over 15 moths in a week.

 

Alfalfa Weevil

There have been a few reports of alfalfa weevil starting to feed on leaflets. As the weather starts to warm alfalfa weevil activity will pick up. Alfalfa Weevil adults will be laying eggs about now. It does not mean there might be a few larvae present. For more on alfalfa weevil please view the link to management information:

https://cals.cornell.edu/field-crops/forages/insects-forage-crops/alfalfa-weevil

   

Alfalfa Weevil Degree Day Accumulations from March 1 to May 5

Weather Station Location	Alfalfa Weevil	Life Stage
Arkport	105	Egg Laying
Ceres	112	Egg Laying
Corwin	96	Egg Laying
Gansevoort	102	Egg Laying
Geneva	132	Egg Laying
Highland	171	Egg Laying
Ithaca	153	Egg Laying
Kinderhook	122	Egg Laying
Laurens	73	Egg Laying
Malone	41	Egg Laying
Peru	52	Egg Laying
Red Hook	143	Egg Laying
Watertown	79	Egg Laying

 

Alfalfa Weevil Life Stage Development

Growing Degree Days for peak (50%) occurrence of stage

Stage of Life Cycle	Degree Days *
eggs hatch	280
Instar 1	315
Instar 2	395
Instar 3	470
Instar 4	550
Cocooning	600
Pupa	725
Adult Emergence	815

*48 degree F base temperature

 

Cereal Leaf Beetle

Cereal leaf beetle adults have been found in a few fields in western NY. They will be laying eggs on small grains soon. Adult beetles have a nice metallic colorful appearance if you are out scouting. For more information on cereal leaf beetle view the following site: https://cals.cornell.edu/field-crops/small-grains/insects-small-grains