April’s Ag Advice

April's Ag Advice by April Borders Oral farm leases will renew automatically for the next growing season on Sept.1, unless written notice of intent to terminate or modify the existing lease is given before Sep. 1. Any lease that renews automatically will carry the same terms and conditions as the existing lease.

Once such notice is given, the existing lease still remains in effect until March 1, 2005, at which time the new contracts become effective. These rules apply to both the tenant and the landowner and the only exception is when one party fails to live up to the terms of the original agreement. Any landlord or tenant who wants to terminate or modify an existing oral contract must notify the other party by Sept. 1.

We have the South Dakota 2004 County Level Land Rents and Values in our office. If you would like a copy of the 2004 values call our office or you can access the publication on the Internet at http://www.nass. usda.gov/sd/

We also need to be continuing to monitor our bean fields for the bean leaf beetle from the pod stage through full seed or "green bean" stage. Dr. Mike Catangui said the pests are already causing damage in parts of the state.

Most of the beetles feeding now are from the second brood this year. Feeding damage now consists of leaf feeding, clipping pods, or direct feeding on the pods. Pod feeding may eventually result in discolored, wrinkled or moldy seeds during harvest. Whole pods may also fall to the ground as a result of pod clipping by the beetle.

The economic threshold is calculated with consideration given to the value or price of harvested beans, potential yield, and cost of control. Given current prices ($6.50 per bushel), growing conditions (40 bushels per acre), and control costs ($12.00), the Economic Threshold would be 3.1 beetles per sweep or a net or 7.2 beetles per foot of row.

Labeled insecticides for bean leaf beetle control in soybeans include Asana XL (21-day PHI), Baythroid 2 (45-day PHI), Dimethoate 4EC (21-dayPHI), Lorsban 4E (28-day PHI), Mustang MAX (21-day PHI), Pounce 3.2EC (60-day PHI), Sevin XLR PLUS (21-day PHI) and Warrior (45-day PHI). Always read and follow label

recommendations. Most insecticides will only give a maximum of three weeks residual control.

The beans can withstand leaf feeding, but once pods are being clipped, insecticide treatment should be considered. Growers considering treatment need to be aware of pre-harvest interval (PHI) of whatever product they intend to use (I've listed them for the above chemicals). Read the label carefully because some of the products have a PHI of up to 60 days. For information on recommended rates call me at 677-7711.

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