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News Article

Sunflower  Crop

Sunflower Crop
Sunflower Fields Beginning to Bloom
South Dakota AG Connection - July 27, 2017

UNDATED - Sunflower fields are beginning to bloom; North Dakota reports 15 percent of that state's sunflowers are blooming while South Dakota reports 5 percent. In Kansas, 14 percent of the crop is reported blooming.

Minnesota reports 89 percent of the crop remained good to excellent, and Kansas each reports 65 percent of the sunflower crop is in good to excellent condition. Meanwhile, North Dakota reports 24 percent of its crop is good to excellent and South Dakota, where the effects of a drought are taking a toll, reports 4 percent of the crop is good and no fields are rated excellent.

The National Sunflower Association, Mandan, N.D., reminds farmers that, as sunflower fields begin to bloom, adults of red sunflower seed weevil (RSSW) will be emerging and will fly to the nearest flowering sunflowers.

RSSW are small (2.5 to 3.1 mm long) with a snout and are reddish-orange. Banded sunflower moth can be identified by its small size (1/4 inch long) and its forewings with a triangular, dark brown band across the middle of the wing. Once the decision to treat has been made, it is critical to time the spray application correctly to get effective management of all sunflower head insects including RSSW, BSM, sunflower moth, and Lygus bug.

The best sunflower plant stage to treat is when the majority of the plants are in the R5.1 growth stage (when pollen shed on 10% of the outer rim of the sunflower head) in a field.

Go to www.sunflowernsa.com/growers/Insects/ to read more about scouting for insects and the best treatments. Click http://bit.ly/2ePwbU9 to learn more about the 2017 Action Thresholds for both insects. Please see the 2017 ND Field Crop Insect Management Guide at http://bit.ly/2uzGYa4 for insecticides registered in sunflower.



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