Weather events, replanting, nitrogen management and weed control made June an interesting month. We are caught up in GDD, after the cool period in May, with warmer than normal weather in Indiana, Kentucky, Tennessee, southeast Missouri and northeast Arkansas. Corn planted in April that escaped flooding is looking very good to excellent. Corn is shorter than normal in central Indiana, but tall and normal height in the south. Late planted corn in mid-May to early June is normal height due to increased heat. Crop condition is best in Kentucky, Tennessee, south east Missouri and then Indiana.
Replanting was at the highest level in years. Fields were flooded after heavy rains. Some field areas had to be replanted at least twice. Crops near wet holes are stunted and corn is yellow along the borders. For example, heavy rains of 4-5 inches hit mid-north Indiana last Friday and flooded areas where the crop is in good to excellent condition and planted early. Almost everyone has experienced some sort of adverse weather such as heavy rains and flooding several times this season. Many fields are uneven in growth but look good to excellent in almost half the fields across all regions.
Corn is in the early grain fill stages in southeast Missouri, northeast Arkansas, Kentucky, and Tennessee and along the Ohio River in Indiana. Corn planting was generally later in portions of Indiana. June planted corn is 5-6 leaf collars compared to corn planted mid-April that is tasseling. Southern rust is moving north, so scouting for the disease in the mid-south is recommended. Common rust was identified on fields a few weeks ago but declines in the heat of summer and usually is not an economic threat. Southern corn rust increases in hot a humid weather.
Soybeans are slow to grow and canopy due to the wetter field conditions. Early planted fields are about to canopy and in the early flowering stages. Later planted fields are not attractive due to the yellow color and stunted growth but will recover and begin flowering soon. Root and stem rot diseases like Phytophthora root rot are noticed more this year. I expect visible Sudden Death Syndrome symptoms in fields by the end of July and early August due to the wet weather. Soybean condition is best in the mid-south in Kentucky, Tennessee, southern east Missouri. Indiana soybeans were generally planted late but will have good potential with favorable summer weather. Double crop beans are successfully planted behind harvested wheat in southern Indiana, Kentucky and Tennessee.
Weed control is a challenge due to frequent showers and later planting. Burn down and pre-plant residual herbicides applied weeks before planting lost effectiveness due to natural decomposition in soils. Heavy weed flushes of large and small seeded broad leaves are reported in many fields. Among the most common are increased levels of water hemp and the always persistent mares tail. Many of these are glyphosate and ALS resistant which make them more difficult to control. Growers using Genuity® Roundup Ready 2 Xtend® technology are able to use the new dicamba herbicides Engenia™ and Xtendimax® with success so far. There are reports of drift injury in several states but extent of injury is not validated to date. Using the correct nozzles, leaving buffer strips, and spraying when temperatures and wind speeds are in range are important, as is spraying to kill small weeds. Control is inconsistent on large weeds.
Nitrogen loss from pre-plant applications has occurred in the water logged soils. Visual symptoms of yellowing plants and stunted growth are easily visible. Side dress operations were completed in most cases and will make a positive difference. It might be feasible to apply late applications of nitrogen if increase yield potential where nitrogen was lost in wet soils.
Several products are really looking great through it all. We learn more things about each product in adverse conditions as well as high yield situations. LG5618, LG5643, LG5663 and LG5650 are looking excellent in the mid-south. LG5650 is handling the heavier soils and best ground slightly better than others. LG5643 is growing well in marginal soils that are not highly saturated. LG5663 looks great on the hills and flat fields. LG5618 is planted on many acres for a reason and doing well.
We had an inconsistent start with difficult conditions at planting due to adverse weather. The main crop is planted and good yield potential is possible for many fields with favorable summer weather. Crop genetics are much improved in recent years and have more ability to overcome adverse conditions with the exception of flooding, hail and high winds. We hope you are satisfied with LG Seeds service and products and have a safe and enjoyable summer.
Note: The information in this issue is based upon field observations and third party information. Since variations in local conditions may affect the information and suggestions contained in this issue, LG Seeds disclaims legal responsibility therefore. Always read and follow label instructions.
Genuity®, Roundup Ready 2 Xtend®, and XtendiMax® are trademarks of Monsanto Technology LLC. Engenia™ is a trademark of BASF.
LG Seeds and design are trademarks of SCA Limagrain.