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Eastern New York Field Crops Pest Report, 2002
General: Alfalfa stands ranged between 8 and 15 inches tall this week at the SUNY Cobleskill farm (August 27).
Potato Leafhopper: Leafhopper infestations have dramatically declined in alfalfa fields this week at SUNY Cobleskill (August 27).
Where did all the potato leafhoppers go? If you want to know see next weeks report!
Check out our on-line publication, Potato Leafhopper Management in Alfalfa
General: No-till corn faired the drought much better than the conventional corn on the SUNY Cobleskill farm. The no-till corn was fairly uniform and about 8 feet tall, while the conventional cropping system had plants ranging from 3 to 12 feet tall (August 27).
Corn Rootworm: There were 3 of 6 fields over threshold for corn rootworm on the SUNY Cobleskill farm this season (August 27).
Kevin Ganoe reports extremely high infestation levels of corn rootworm in three fields in Herkimer County. The levels reached as high as 54 corn rootworm beetles in 8 samples. Many of the plants exhibited the classic ìgoose necking.î Lodging of corn is a symptom of excessive corn rootworm feeding on roots. This type of lodging is sometimes called goose-necking. Goose-necking is an attempt by the plant to straighten up again after it has begun to lean or lodge.
What do you do if you had fields over threshold for corn rootworm this
For more information on How to Monitor for Corn Rootworm check out our online publications:
In the fall, weeds are fully-grown and easily identified. Correctly identifying and recording weeds helps you select the most economical method of control. Knowing whether the weed is a broadleaf, grass, sedge, summer or winter annual, biennial, or perennial is critical in selecting the right weed control measures. Remember, while herbicides are widely used for weed control other methods like crop rotation, cultivation, proper fertilization, planting dates, banding pre-emergence herbicides, crop spacing, plant populations, cover crops and combinations of these techniques should also be part of an integrated weed control program.
Conduct your fall weed surveys from late August through October. Sketch out a map, walk each 1/4 of the field, and record the weeds you observe. While no economic thresholds have been developed for weeds in New York, we recommend using a weed rating scale. The following scale can help you determine the severity of weed infestations in cornfields.
Evaluating Weed Presence- Weed Rating Scale:
So take a few minutes and encourage growers to look at their fields---it will help save on weed control costs and increase crop production. Remember, if you don't look, you will never know.
Check out our on-line publication:
Management in Field Corn
Do weeds indicate what insect pests may infest a cornfield next year? See the next exciting issue of Eastern New York Field Crops Pest Report!