NYS IPM Weekly Field Crops Pest Report

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Soybean Aphid (Aphis glycines)

Soybean aphids have been reported at high infestation rates on a few fields in western NY. This is most likely the 1st generation of soybean aphids migrating off buckthorn. Buckthorn species (Rhamnus spp) are the overwintering host of soybean aphids.

This is a soybean aphid and nymph

soybean aphid and nymph

This is a photo of light green tiny soybean aphids on a soybean leaf

190 soybean aphids on leaflet

For more information view the following website:

https://cals.cornell.edu/field-crops/soybeans/insects-soybeans/soybean-aphid

 

Potato leafhopper (Empoasca fabae)

Potato leafhopper has been found at low numbers statewide. With these hot temperatures it will likely increase the population. Many times, when nymphs are present in fields is when damage to alfalfa occurs. It is best to have a 7-10 days scouting schedule. If you start to see yellowing from potato leafhopper it is too late the damage is done. A field could lose up to ½ ton of forage per acre and a decrease in the quality of the alfalfa.

A photo of potato leafhopper damage to alfalfa

potato leafhopper damage

this is a photo of potato leafhopper nymphs

Potato Leafhopper Nymphs

A Video on IPM for Potato Leafhopper in Alfalfa:

https://www.youtube.com/watch?v=8BIZYTq7Zec&list=PLE19BD8A62BE7D671&index=14&t=9s

Publication on Potato Leafhopper in Alfalfa:

https://cals.cornell.edu/field-crops/forages/insects-forage-crops/potato-leafhopper

 

Field Corn Pheromone Trapping Network

Black Cutworm and True Armyworm

There continues to be flights of black cutworm (BCW). Most of the corn is beyond the V6 stage of growth. At this point BCW can not really damage the corn. True armyworm has been at very low levels this year.

This is a graph of black cutworm weekly flight each year for 2019 to 2023. This year we had some significant flights.

Black Cutworm Flights By year

This is a graph of true armyworm weekly flight each year for 2019 to 2023. This year we had very few flights.

True Armyworm Flights By Year

We will be transitioning from black cutworm and true armyworm to western bean cutworm and fall armyworm in the next few weeks. The interactive map will include all of these moth captures as well.

Field Corn Pheromone Trapping Network Interactive Map

 

Potato leafhopper (Empoasca fabae)

Potato leafhopper have been found at low numbers statewide. With these hot temperatures they will likely increase the population. Many times, when nymphs are present in fields is when damage to alfalfa occurs. It is best to have a 7–10-day scouting schedule. If you start to see yellowing from potato leafhopper it is too late the damage is done. A field could lose up to ½ ton of forage per acre and a decrease in the quality of the alfalfa.

A Video on IPM for Potato Leafhopper in Alfalfa:

https://www.youtube.com/watch?v=8BIZYTq7Zec&list=PLE19BD8A62BE7D671&index=14&t=9s

Publication on Potato Leafhopper in Alfalfa:

https://cals.cornell.edu/field-crops/forages/insects-forage-crops/potato-leafhopper