Pockets of soybean aphids found…

Soybean aphids found north of Galesville today.

Soybean aphids found north of Galesville today.

We were out scouting some soybean fields north of Galesville today and found some pockets of aphid pressure. Please remember to be checking your fields on a regular basis.

On a related note, here is a pop quiz for the day: Is the insect pictured below a friend or foe?

Lady beetle Larvae

Click to enlarge photo.

The answer? Friend! This little guy is actually the larval stage of the lady beetle. The lady beetle eats soybean aphids. Remember with the insects the stages are egg, larvae, pupa, and adult.

– Rob Shields, Agronomist

Insect activity found today…

Near Galesville today I found my first Western Bean Cutworm Egg Mass. The moth counts are very low this year. We put out 5 pheromone traps and have found very few this season. I also found a fair number of Corn Rootworm beetles feeding on the fresh silks today. Please keep a watchful eye on your corn fields during the critical pollination phase. The published threshold is “when silk clipping is occurring on 25% or more of the plants during pollen shed.” Also, if this field will be corn next year, it is best to plan your management strategy to combat this pest now due to the fact that they will be laying eggs now to attack next year’s corn crop. Please let us know if you have questions on any of these issues. Thank you.

– Rob Shields, Agronomist

Western bean cutworm egg masses.

Western bean cutworm egg masses.

Corn rootworm beetle feeding.

Corn rootworm beetle feeding.

Corn rootworm beetle feeding.

Corn rootworm beetle feeding.

Crop Update

Corn

Our black light traps are showing low to very low levels of western bean cutworm moths, European corn borer, and corn earworm, especially compared to the levels we were finding this time last year. We have found a few corn leaf aphids on some of the heavier ground in our area so be sure to be monitoring your fields for this pest as the summer progresses. Much of the corn in our area is at the tail end of pollination and is looking good. Low levels of rust can be found in most all of the fields in our area. Anthracnose leaf spot is common in fields that are corn after corn. We have only found a few fields with trace amounts of Northern corn leaf blight to date, but with wet weather on the forecast it is likely to spread.

Soybean

Japanese beetle, green clover worm, aphids have been the main insects we have been finding these past few weeks, but no fields have reached economic thresholds yet. Be vigilant in scouting for aphids as the extended forecast of cool weather will be very conducive to aphid reproduction. University thresholds are 250 aphids pre-plant which may sound like a lot, but when the population can double every few days it does not take very long for a field to become infected. Septoria brown spot is slowly building in the lower canopy of many of the soybean fields in our area. Consider a foliar fungicide if you have moderate or heavy disease pressure at this time. The key time for fungicide on soybeans is the R1 (beginning flower) to R3 (beginning pod) stage. Many of our fields are in the R3 stage to R4 (full pod).

Potato

Late blight continues to be a problem and is slowly but surely spreading with each week, bringing one or two more fields found to have been infected. So continue to apply fungicide on your scheduled interval being sure to add premium late blight material especially on the weeks of cool wet weather like we have been having. We are currently in the midst of second generation Colorado potato beetles with adults already laying eggs and larvae hatching. Some of the petiole numbers are starting to crash as the crop begins to pour energy into the tubers. We have been checking tubers for shape and size last week and this week to see if an MH30 application is needed to correct the shape of the tubers.

– Otto Oemig, Agronomist

Soybean aphids are showing up in certain areas…

Soybeans aphids from today, July 30.

Soybeans aphids from today, July 30. Click to enlarge.

Soybean Aphids found in Waushara county today. Please check your soybean fields every 3 to 5 days to make sure you don’t have a population that is building. Let us know if you need any help looking for this pest.

– Rob Shields, Agronomist

Armyworms ATTACK area corn fields

Please keep a close eye on your corn fields, especially those with a lot of trash or weeds. These photos taken by Wayne Roemer, an Agronomist out of our Plover location, show the extreme damage they cause. Wayne took these photos 8 miles south of Waupaca. Sally Turpin, an Agronomist out of our Mauston location, also found a heavily damaged field just north of Mauston. This pest moves rapidly and can leave only the stalk and mid rib on the corn plant. It is important to spray before the damage gets this bad. Please let us know if you need any help checking your fields.

– Rob Shields, Agronomist

Armyworms in Waushara county.

Armyworms in Waushara county.

Armyworms in Waushara county.

Armyworms in Waushara county.

Armyworm damage north of Mauston.

Armyworm damage north of Mauston.

 

Disease pressure is high in soybeans this year…

Today we looked at a number of soybean fields that have been attacked by a number of soil born diseases. Because of the extreme conditions this season – cool and wet, then hot and dry – a lot of fields are starting to show problem areas. The field pictured below in particular looks like it has some areas of rhizoctonia starting. We are sending some samples down to the plant pathology lab to confirm our diagnosis.

– Rob Shields, Agronomist

Diseased area in soybean field.

Diseased area in soybean field.

Rhizoctonia in soybeans.

Rhizoctonia in soybeans.

Tissue Sampling Alfalfa Today in Galesville

With third crop well on its way, we are checking to see where the fertility levels are. This way if some crop nutrients are needed, we can add some in when we spray the alfalfa for potato leaf hoppers. Please let us know if we can assist you in managing this crop.

– Rob Shields, Agronomist

Alfalfa tissue sampling.

Alfalfa tissue sampling.

Tissue sampling in Galesville, WI.

Tissue sampling in Galesville, WI.

Japanese Beetles Attack!

A lot of our field and vegetable crops are now being attacked by Japanese Beetles, see photos. They consume the leaves of many crops, such as corn, soybeans, snap beans, tomatoes, melons, etc. Please check your fields now or contact one of our Allied Cooperative agronomists to assist you.

 – Rob Shields, Agronomist

Japanese beetle 1

Answer Plot Event Tonight!

Allied Cooperative would like to invite all area growers to our Answer Plot event to be held today (July 17th).  We will have an Annual Meeting at 4:00 p.m., followed by a delicious steak fry dinner (FREE!), and a tour of our Answer Plot at 5:45 p.m.  The plot is located two miles east of the Hwy. 13 & 82 intersection in Adams County, Wisconsin.

It may be a steamy day — but you can almost hear the corn grow at the Answer Plot.  Come on out and see how different varieties are performing and gain insight in managing this year’s crops.

2013-07-17_08-58-11_58

 

Crop Update

Corn

This past week we found the first rust pustules of the season which means that rust spores are in the area. Carefully monitor your corn fields for rust as the season goes on, especially those fields with sensitive or less resistant hybrids. Start planning ahead to tasseling which for some may be right around the corner, with as wet a year this has been we should expect higher than average foliar fungus pressure this year so consider an application of a fungicide at Tasseling and R1 in the corn this season.

Soybeans

We are finding low levels of brown spot of soybean in a few fields across the area. Soybeans are growing rapidly at this stage. We are finding soybean aphids in most fields this year. With these levels of aphids this early in the season, combined with the favorable aphid weather we have been having it is very likely that control will be needed in many of the fields in our area this year.

Potatoes

Late blight was found in south central Portage county today. This point of infection is 20 miles north and east from the original infection site. In most of the fields in our area we have the Colorado Potato Beetles under control at this point with just trace levels left in most fields. Early blight continues to remain in check on the lower canopy in fields that are receiving regular fungicide applications. Also we are just starting to find bacterial vine rot in some of the more sensitive varieties.

– Otto Oemig, Agronomist