UW-Madison, IPCM Programs Sessions Purpose? There are two goals to this session. There are two goals to this session. 1.Evaluate your current practices. 2.Learn what changes you can easily make. This is a self assessment. This is a self assessment. –The worksheet will not be collected. –Be honest with your answers. –Ask questions as we go along.

UW-Madison, IPCM Programs Four areas of assessment General Crop Management General Crop Management Weed Management Weed Management Insect Management Insect Management Disease Management Disease Management ? ? ? ?

UW-Madison, IPCM Programs Assessment Worksheet Diagram of worksheet here. Explanation of how to fill it out.

UW-Madison, IPCM Programs Insect Management What is Your Insect Management Philosophy –Complete Insect Control??? Control costs < damage –Dont control insects at all??? Could suffer economic loss –Same insecticide treatments each year??? Insect populations fluctuate –Keep populations below economic thresholds Most economically and environmentally sound

UW-Madison, IPCM Programs Insect Management Improper Identification –Can increase control costs –Can increase amount of insect damage –Can kill beneficial insects –Can lead to insecticide resistance

UW-Madison, IPCM Programs Cooperative Pest Survey Bulletin Free from WI Dept. of Ag. Weekly assessment of insects and diseases Doesnt take the place of scouting Does remind you to scout

UW-Madison, IPCM Programs Insect Management Scouting Records –Helps identify fields, which overtime, might need preventive controls or special treatment Wireworm White grub Stalk borer Hop vine borer

UW-Madison, IPCM Programs Insect Management Why scout seedling corn for white grub, wireworm and seed corn maggot if rescue treatments arent available? –Develop field histories for preventive control measures –Identifies actual problem if you have reduced plant stands

UW-Madison, IPCM Programs Insect Management Black cutworm scouting –Start scouting at emergence –Most susceptible fields Corn after soybeans Low areas of field Weedy field –Scout at weekly intervals until V4-V5

UW-Madison, IPCM Programs Insect Management First Generation European corn borer –Use Pest Survey Bulletin to schedule first visit –Early planted fields most susceptible –Scout at weekly intervals until threat is over –Look for shotholing in new leaves –Pull whorl leaves & count larvae (5% loss/larvae) –Monitor Bt corn for resistance

UW-Madison, IPCM Programs Insect Management Second Generation European Corn Borer –Use Pest Survey Bulletin to schedule first visit –Late planted fields most susceptible –Scout at weekly intervals until threat is over –Count egg masses –Monitor Bt corn for resistance

UW-Madison, IPCM Programs Insect Management Using European corn borer scouting information to schedule harvests –Protect against harvest losses caused by Stalk tunneling Stalk rots –Use information from first and second generation –Harvest heavily damaged fields first (if you have a choice)

UW-Madison, IPCM Programs Insect Management Scouting for corn rootworm beetles can predict next years damage potential –Scout during egg laying period (mid-August to early-September) –1-3 visits are necessary –Treat or rotate if you average > 0.75 beetles/plant

UW-Madison, IPCM Programs Insect Management Granular Insecticides for first year corn?? In Wisconsin, Female corn rootworms lay eggs in corn (some exceptions in IL, IN, MI)

UW-Madison, IPCM Programs Insect Managment Using below labeled rates of Counter, Force and Lorsban to control rootworms under light to moderate populations –Up to 25% rate reduction for rootworms –Scientific data from North Central Region is encouraging –Proper calibration is a must –No product guarantee from company

UW-Madison, IPCM Programs Insect Management A benefit of weed control is improved insect management WirewormWhite Grub Stalk borerBlack cutworm ArmywormSlugs Hop vine borerBillbug

UW-Madison, IPCM Programs Insect Management Soil Insecticide Calibration –Calibration saves $ –Dont use book values from operators manual or insecticide label –Calibrate each row of the planter –Company reps will (want to) help

UW-Madison, IPCM Programs Insect Management Bt hybrid selection –Based on probability of damage on your farm Scouting data from previous years Follow up loss estimates –5% loss/first generation larvae –4% loss/second generation larvae

UW-Madison, IPCM Programs Insect Management Insect Resistance Management for European corn borer –Real concern – 20% Non-Bt Refuge, No hybrid restrictions –Refuge must be within 1/2 mile of Bt corn, 1/4 mile if you want to maintain option to spray refuge –Refuge can be treated if economically justified. If refuge areas are to be treated for corn borers, microbial Bt foliar sprays are not to be used. –IRM plant for rootworm resistant hybrids will be different

UW-Madison, IPCM Programs Disease Management

UW-Madison, IPCM Programs Disease Management Northern Corn Northern Corn Leaf Blight Anthracnose Anthracnose Yellow Leaf Blight Yellow Leaf Blight Grey Leaf Spot Grey Leaf Spot

UW-Madison, IPCM Programs Disease Management Northern Corn Northern Corn Leaf Blight Anthracnose Anthracnose Yellow Leaf Blight Yellow Leaf Blight Grey Leaf Spot Grey Leaf Spot

UW-Madison, IPCM Programs Where to get help for corn disease ID County Extension Agents UW Plant Disease Clinic & Web site Integrated crop and pest management website Cooperative Extension Publications –A3646 Pest Management In WI Field Crops –A Corn Disease I (Picture Sheet) –A Corn Disease II (Picture Sheet)

UW-Madison, IPCM Programs Disease Management AprilMayJuneJulyAug.Sept.Oct. Seed Rots Seedling Blights Anthracnose Leaf Blight Anthracnose Stalk Rot Nematodes Common Rust Northern Corn Leaf Blight Northern Corn Leaf Spot Grey Leaf Spot Gosss Bacterial Wilt & Blight Eye Spot Fusarium & Gibberella Ear Rot Fusarium & Gibberella Stalk Rot

UW-Madison, IPCM Programs Seed Treatment is more than color Captan-Widely used borad spectrum contact fungicide, however, poor on pythium and very dusty. Metalaxyl-Narrow spectrum systemic fungicide with excellent activity against Pythium Fludioxonil-broad spectrum contact fungicide, very effective against Fusarium, but poor Pythium activity.

UW-Madison, IPCM Programs Plant Stresses August Leaf diseases Insect feeding Hail injury Low soil fertility Compaction Etc. August/September High soil moisture Increased Pythium Root Infection Premature plant death -rotting stalks -Lodged plants

UW-Madison, IPCM Programs Time to total your score. Sum each category separately. Sum each category separately. Sum each category. Sum each category. Pass in your scores. DO NOT put your name on them. Pass in your scores. DO NOT put your name on them.

UW-Madison, IPCM Programs Summary You should have a good idea where you stand in the IPM continuum. You should have a good idea where you stand in the IPM continuum. You should have an idea of what options you can use. You should have an idea of what options you can use. Remember to make small changes and evaluate the time, labor and profit. Remember to make small changes and evaluate the time, labor and profit.

UW-Madison, IPCM Programs Where to Get More Information Wisconsin Crop Manager Wisconsin Crop Manager Wisconsin Pest Survey Bulletin Wisconsin Pest Survey Bulletin Your local Cooperative Extension office Your local Cooperative Extension office Consulting services, other sources Consulting services, other sources

UW-Madison, IPCM Programs Insect Management

This program is an effort of the University of Wisconsins Integrated Pest and Crop Management Programs with funding provided by the Pesticide Use and Risk Reduction Project.