Newsletter 2004

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Northwest Iowa Crop Update Newsletter by Todd Vagts ISU Extension Crops Specialist Counties Served: Carroll, Calhoun, Crawford, Ida, Monona, Pocahontas and Sac.

Welcome to my weekly Crop Update Newsletters. The purpose of this newsletter is to keep those involved and interested in northwest Iowa agriculture updated on current news at ISU; to disseminate timely and helpful weather and crop production-protection information; to document what I am seeing in the field as I travel the seven county area; and hopefully give insight and ideas for solving production problems as they happen. I encourage any thoughts and ideas as to how I can improve the newsletter as the season progresses. To receive this newsletter via email, please register

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Back Issues
Newsletter 2004

Volume, No.	Printer Friendly	Topics	Special Issues, Topics
Vol 4, No 32 November 24, 2004	Word pdf	Season recap Soybean Rust Info Crop Advantage Conference Fall soil moisture survey ICIA yield trial data available Corn RW insecticide performance data Soybean Cyst resistant varieties Tillage study cooperators needed	Soybean Rust Soybean Aphid Yield Check Survey

Vol 4, No 31 October 11, 2004	Word pdf	Grain drying and storage Corn stalk feed value Minimize soil compaction Deep tillage considerations Soil sampling for future manure mngt.plans Use crop residue to protect the soil	Soybean Aphid Yield Check Survey

Vol 4, No 30 October 04, 2004	Word pdf	Soybean harvest near complete Degree-day overview Corn dry-down estimates Calculating corn shrink Take the soybean aphid survey	Degree-days Crop Model Data

Vol 4, No 29 September 27, 2004	Word pdf	Near record warm September Corn dry-down rates Avoid harvest losses Weather comments Take the soybean aphid treated vs. non-treated yield survey	Degree-days Crop Model Data

Vol 4, No 28 September 20, 2004	Word pdf	Warm trend continues. Soybean harvest tips Avoid soybean hidden yield losses On-farm soybean storage Take the soybean aphid treated vs. non-treated yield survey Corn rootworm B.t., the Illinois experience Schedule learning opportunities	Degree-days Crop Model Data

Vol 4, No 27 September 13, 2004	Word pdf	Fortunately, another warm week. Harvest begins on early soybeans Grain drying and storage fact sheet Plant winter rye as a cover crop Last chance to scout and evaluate fields Fall forage management options	Degree-days Crop Model Data

Vol 4, No 26 September 03, 2004	Word pdf	3rd warmest week of the year Cool temp effects on corn and soybean Estimating soybean yields Prepare storage facilities for grain Fall corn stalk test	Degree-days Soybean Aphid Crop Model Data

Vol 4, No 25 August 30, 2004	Word pdf	Crop development 12 days behind normal Harvesting lodged and drought stressed corn Estimating soybean yields Powdery mildew in soybean fields End of year field evaluations Give the alfalfa a rest	Degree-days Soybean Aphid Crop Model Data

Vol 4, No 24 August 23, 2004	Word pdf	Last week for aphids Warmer temperatures return Harvest Silage at the correct moisture Predicting silage harvest date	Degree-days Soybean Aphid Crop Model Data

Vol 4, No 23 August 16, 2004	Word pdf	Cool temperatures continue Remembering when Soybean growth stages Soybean aphid numbers increase	Degree-days Soybean Aphid Crop Model Data

Vol 4, No 22 August 09, 2004	Word pdf	Manure solid settling highlighted at field day August or October? Corn and Soybean advancing slowly Soybean aphid numbers increase The SAGE Models predicts aphid population growth WBC moth catch drops dramatically	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid Crop Model Data

Vol 4, No 21 August 02, 2004	Word pdf	Rain and mild temps benefit grain fill Soybean leaf sunburn Compensating for forage shortages Grain harvest preparations Soybean aphids still hard to find Continue scouting WBC in replanted corn Conditions ideal for white mold Manure nutrient mngt short course	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid Crop Model Data

Vol 4, No 20 July 26, 2004	Word pdf	Below normal degree-days for 6 weeks Predicting corn harvest dates Soybean crop nearing critical yield phase Cool nights – too much of a good thing? Late summer alfalfa seeding WBC moth catch peaks Conditions ideal for SA development Soybean diseases make early appearance	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid Crop Model Data

Vol 4, No 19 July 19, 2004	Word pdf	Pollination under ideal conditions Soybeans starting to develop pods Cool conditions will delay crop maturity Scout now for 1st generation BLB WBC moth catch increases Soybean aphids scarce, but be vigilant	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid Crop Model Data

Vol 4, No 18 July 12, 2004	Word pdf	Above normal degree-days forecasted Corn begins pollination Soybeans at full flower WBC moths caught BLB 1st generation scouting Soybean Aphid remains scarce	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid

Vol 4, No 17 July 06, 2004	Word pdf	Cool conditions prevail Corn development nears tassel WBC and BLB monitoring Holcus Spot in corn Soybean leaf cupping	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid

Vol 4, No 16 June 28, 2004	Word pdf	Degree-day accumulation falls below normal Corn reaches critical yield determination period Soybean begin flowering 1st generation Bean Leaf Beetle Western Bean Cutworm Soybean Aphid Update Wet conditions promote corn leaf diseases	Western Bean Cutworm Bean Leaf Beetle Degree-days Soybean Aphid

Vol 4, No 15 June 21, 2004	Word pdf	Crop Scouting Clinic Degree-day accumulation falls below normal Soybean to begin flowering Iron Chlorosis in Soybean Flooded crop information Learning from a “Computer” crop Scout for Soybean Cyst Asian Soybean Rust information	Degree-days Soybean Aphid

Vol 4, No 14 June 14, 2004	Word pdf	Soybean Aphids make early appearance Cooler week forecasted Oat harvest recommendations Corn leaf striping Wet conditions promote soybean disease Potato leaf hopper threshold	Degree-days Soybean Aphid

Vol 4, No 13 June 07, 2004	Word pdf	Warm week ahead Remove weeds early to avoid yield loss Monitor fields for disease problems Soybean rust update Potential Alfalfa pest problems	Degree-days Corn Planting Guide Soybean Replant Decisions

Vol 4, No 12 June 01, 2004	Word pdf	Corn-Soybean development near normal Consider raising alfalfa cutting height Post-emergent weed control options Stalk borer migration to begin this week Rootworm hatch to begin next week Assessing N loss potential	Degree-days Hail Damage on Corn and Soybeans Corn Planting Guide Soybean Replant Decisions

Vol 4, No 11 May 23, 2004	Word pdf	Excessive rains damage crops Corn, soy and alfalfa damage assessment tools Plant survival under water Alfalfa at optimum quality Delayed weed control options Assessing N loss potential	Degree-days Hail Damage on Corn and Soybeans Corn Planting Guide Soybean Replant Decisions

Vol 4, No 10 May 17, 2004	Word pdf	Degree-day accumulation near normal Early planted corn at V4 Monitor soybean fields Predicting in-field alfalfa quality Over-wintered Bean leaf beetle thresholds Late spring nitrate test	Black Cutworm Soil Temp Degree-days Crop Emergence Dates

Vol 4, No 09 May 10, 2004	Word pdf	Degree-day accumulation 134% of normal Early planted corn at V2 Evaluate replant situations economically Projected black cutworm cutting date May 20 Early emerged soybeans and bean leaf beetles Soybean germination and emergence Making the most of Post emergent herbicides	Black Cutworm Soil Temp Rust Risk Analysis Degree-days Crop Emergence Dates

Vol 4, No 08 May 03, 2004	Word pdf	Degree-day accumulation to spike Early planted corn to reach V2 Soybean seeding rate 4-week wet dry cycle USDA Soybean Rust risk analysis How windy has it been? Plant to avoid soybean diseases Soybean insect pest management	Black Cutworm Soil Temp Rust Risk Analysis Degree-days

Vol 4, No 07 April 26, 2004	Word pdf	Near normal growing season predicted Soil temperatures remain cool Degree-day accumulation near normal Avoid herbicide drift potential Black cutworm moths caught Bean leaf beetle over-wintering mortality Control musk thistles in May	Black Cutworm Soil Temp

Vol 4, No 06 April 19, 2004	Word pdf	Soil temperature peaks Degree-day accumulation above average Monitor seedling germination and emergence Soil moisture survey Scout for Alfalfa Weevils	Alfalfa Weevil Soil Temp

Vol 4, No 05 April 12, 2004	Word pdf	Monitoring soil temperatures Don’t plant corn to early Optimum corn seeding rates Information on producing popcorn Avoid ammonia injury to corn roots Prepare to scout for Alfalfa Weevils Predicting weed emergence Rethinking the use of dual tires	Alfalfa Weevil Evaluate Alfalfa Stands Soil Temp

Vol 4, No 04 April 05, 2004	Word pdf	Monitoring soil temperatures Strive for uniform plant emergence Interpreting seed lab results Check alfalfa for winter stand injury ISU Nitrogen rate recommendations Time to set wireworm bait traps Soybean rust update	Evaluate Alfalfa Stands Soil Temp

Vol 4, No 03 March 29, 2004	Word pdf	Precipitation well above normal Soil temperature to cool slightly Use WebGro with last minute soybean management decisions Comments on Soybean Aphid in 2004 Gaucho seed treatment for soy

Vol 4, No 02 March 22, 2004	Word pdf	Soil temperatures running above normal Climate data sources Oat seeding Alfalfa Seeding Tips Insecticide and Fungicide seed treatments On-line newsletters

Vol 4, No 01 March 09, 2004	Word pdf	Comments from Elwynn Taylor Western IA in hydrological drought Soybean aphid treatment survey yields results Soybean aphid educational CD Gaucho seed treatment on soybean seed On-line newsletters a good source of information




Information on Portable Document Files (.pdf)
For more information on crop related topics in IA, visit the Integrated Crop Management Newsletter web site.

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[ NW Iowa Crops webpage ]

For questions or comments please respond to vagts@iastate.edu

This page last updated on 01/26/05

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