Newsletter 2003

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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Other Issues: [2004][2002][2001]

Volume, No.	Printer Friendly	Topics	Special Issues, Topics
Vol 3, No 30 October 13, 2003	Word pdf	Soybean aphid survey (preliminary) data shows advantage for treatment 2003 degree-day accumulation near normal Leave crop residue to protect the soil 2004 Crop Advantage Series	Soybean Aphid Yield Check Survey

Vol 3, No 29 October 07, 2003	Word pdf	Take the soybean aphid “treated vs. non-treated” yield survey Calculate grain weight losses from drying Making the most from corn stalks Managing soil compaction Soil sampling dry soils	Soybean Aphid Yield Check Survey

Vol 3, No 28 September 29, 2003	Word pdf	Take the soybean aphid “treated vs. non-treated” yield survey Harvest Progress Check for harvest losses Hidden soybean yield losses What is a killing frost Grazing Alfalfa following a frost Managing frost injured sudangrass	Soybean Aphid Yield Check Survey

Vol 3, No 27 September 22, 2003	Word pdf	Below normal degree-day accumulation continues Soybean harvest has begun Corn and Soybean quality affected by late season drought Take the soybean aphid “treated vs. non-treated” yield survey Know where to go Last check for WBC Learning opportunities abound	Soybean Aphid Yield Check Survey Aflatoxin in Corn

Vol 3, No 26 September 15, 2003	Word pdf	Seasonal degree-day accumulation on normal track Area crop nearing physiological maturity Look for crop signals when scheduling harvest activities Fall soil moisture recharge potential of 5 inches	Aflatoxin in Corn PM 1584, Cornstalk Testing

Vol 3, No 25 September 5, 2003	Word pdf	Two months without rain How much yield potential was lost in August? Be prepared to harvest drought stressed crops Scout corn for stalk rot Evaluate your corn nitrogen program Charcoal Rot: A new disease to IA soybeans	Aflatoxin in Corn PM 1584, Cornstalk Testing Corn Silage

Vol 3, No 24 September 2, 2003	Word pdf	Cool and dry conditions forecasted Calculate the yield potential of the soybean crop Scout fields now for pest and soil problems Early soybean senescence: disease or drought induced? Give the alfalfa a rest	% Soybean Yield in Pod Soybean Aphid

Vol 3, No 23 August 25, 2003	Word pdf	Western research farm field day Drought stressed corn is wetter than you think Management options for drought stressed pastures The end is near for soybean aphid control decisions What % of total soybean yield still needs protecting?	% Soybean Yield in Pod Soybean Aphid Western Research Farm Field Day

Vol 3, No 22 August 18, 2003	Word pdf	Western research farm field day Harvest silage at the correct moisture Estimating corn grain yield What stage are the soybeans? Soybean aphid populations continue to increase	Soybean Aphid Western Research Farm Field Day

Vol 3, No 21 August 11, 2003	Word pdf	Soybean Aphid on the increase Crop moisture stress increases Moderate temps and normal DD accumulation continues Begin planning for corn silage harvest Soybean crop begins filling seed	Soybean Aphid ECB Treatment Calculator

Vol 3, No 20 August 04, 2003	Word pdf	Precipitation events scattered across region. With pollination complete, area crops now work on filling grain Alleviate feed shortages by harvesting immature corn Prepare storage areas for harvest Scout corn for 2nd generation ECB WBC moth flight declining, but not over	Western Bean Cutworm Late Summer Alfalfa Seeding ECB Treatment Calculator

Vol 3, No 19 July 28, 2003	Word pdf	Soybean nearing critical period for yield determination. Note silking date to determine harvest date Mild temps promote pollination and grain fill Late summer alfalfa seeding WBC moth catch moves north Late season crop diseases	Western Bean Cutworm Late Summer Alfalfa Seeding

Vol 3, No 18 July 21, 2003	Word pdf	July rainfall plentiful, but dry forecast looms ahead. Normal degree-day accumulation continues WBC moth flight increases BLB emergence peaks in most soybean fields Grasshoppers still bugging you?	Western Bean Cutworm Bean Leaf Beetle Hail and Water Ponding Potato Leafhopper

Vol 3, No 17 July 16, 2003	Word pdf	Near perfect conditions for pollinating corn Soybeans reach full flower Bulletin on Hail and Flood damage assessment WBC moth flight slow to develop Scout 1st generation BLB for 2nd generation control tactics	Western Bean Cutworm Bean Leaf Beetle Hail and Water Ponding

Vol 3, No 16 July 07, 2003	Word pdf	Near normal week ahead Soybeans advance into bloom stage WBC moths caught Increase spray droplet size for improved pesticide uptake New GPS magazine now online	Western Bean Cutworm Bean Leaf Beetle

Vol 3, No 15 June 30, 2003	Word pdf	Warmest week of the year Corn development surpasses V12 Get to the source of grasshopper problems Scouting 1st generation BLB Western Bean Cutworm emergence may be delayed Foliar feeding corn and soybean

Vol 3, No 14 June 23, 2003	Word pdf	DD accumulation near normal Iron chlorosis in soybean Is row cultivation really necessary? Soybean Rust bulletin now available Soybean Virus and Pest injury identification 1st generation BLB in soybean Soybean Cyst Nematodes Leaf striping in corn	Hail Damage on Corn and Soybeans

Vol 3, No 13 June 16, 2003	Word pdf	Warm conditions favor corn and soybean development Begin ECB scouting on 20” corn Broadleaf weed control influenced by time of application Potato Leaf Hoppers in Alfalfa Potassium deficiency in corn may indicate root problem Uneven corn may be a result of Ammonia burn	Hail Damage on Corn and Soybeans

Vol 3, No 12 June 09, 2003	Word pdf	Warmer week forecasted Yellow and Purple corn Hail damage evaluation tools Watch Alfalfa Regrowth for insect feeding Corn Post-Emerge Herbicide considerations Weed control in alfalfa following 1st cutting	Hail Damage on Corn and Soybeans Corn Planting Guide Soybean Replant Decisions

Vol 3, No 11 June 02, 2003	Vol 3, No 11	Warm week advances crop development Soybean Stand Assessment Stalk Borer migration to begin soon BLB control guidelines IA Bee Rule Use the LSNT to evaluate nitrogen status	Soybean Replant Decisions Late Spring Nitrate Test

Vol 3, No 10 May 27, 2003	Vol 3, No 10	El Nino or La Nina? Corn Kernel Rows to be determined soon Use PEAQ for alfalfa harvest BLB decisions Check your Nitrogen status with the Late Spring Nitrate Test	Soybean Replant Decisions PEAQ Late Spring Nitrate Test

Vol 3, No 09 May 19, 2003	Vol 3, No 09	Earliest planted corn nearing 2-leaf stage. Soil temperature recovers in time for soybean planting Don’t switch to shorter season corn yet Avoid herbicide application to stressed corn Scout for early season corn insects New Website for calculating soil loss	Bean Leaf Beetle Control (VC-V1) Corn Planting Guide Soybean Replant Decisions

Vol 3, No 08 May 12, 2003	Vol 3, No 08	Degree-day accumulation lags behind 12-year average Soil temperature is cold Monitor planted fields for emergence problems BLB have less time to lay eggs Soybean disease potential Black Cutworm Scouting Use patience getting back into fields	Black Cutworm Scouting

Vol 3, No 07 May 5, 2003	Vol 3, No 07	Weather Update Degree-day accumulation and corn emergence ICM Newsletter IA Bee Rule BLB and BPMV	ISU Integrate Crop Management Newsletter

Vol 3, No 06 April 28, 2003	Vol 3, No 06	Weather conditions favorable Soil temperature warming DD accum. greater than normal Is soybean with discolored seed coat safe to plant? Soybean seeding rate tips	Degree Days

Vol 3, No 05 April 22, 2003	Vol 3, No 05	Weather Update Soil temperature cools Degree-days slow to accumulate What to look for in seed germ. BLB winter mortality prediction Monitor Alfalfa Weevils Time to control Musk Thistles

Vol 3, No 04 April 17, 2003	Vol 3, No 04	Soil Temperature Monitor Crop Emergence Scout for Alfalfa Weevil Avoid Ammonia Injury to Corn	Alfalfa Stand Evaluation Nitrogen Recs

Vol 3, No 03 April 7, 2003	Vol 3, No 03	DD and phenology models Soil Temperature Interpreting seed germ tests Alfalfa winter injury ISU Nitrogen recommendations Manure nitrogen availability Corn rootworm plots needed	Alfalfa Stand Evaluation Nitrogen Recs

Vol 3, No 02 March 27, 2003	Vol 3, No 02	Soybean seedling disease mngt Oat Seeding Alfalfa Seeding Twin-row corn Popcorn Production Gypsum	Soil Temp and Insect over wintering success

Vol 3, No 01 February 20, 2003	Vol 3, No 01	Welcome back WRDF Ag Day Bacillus thuringiensis (B.t.) Insect pest over wintering success Climate Change and Yield Boost Newsletters	Survey Soil Temp Ag Day


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

[ NW Iowa Crops webpage ]

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

This page last updated on 02/03/04

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