|
Volume
3 Issue
11
August 1, 2006
Soybean Aphid Situation - A Few
More Weeks of Decisions
Soybean aphid populations require continued watching. Some fields
are on there second insecticide application. Others, where
applications were made earlier, look good with infestations
maintaining below threshold.
Soybean Growth Stages for Pest
Management Decisions
Management decisions on whether to treat soybean aphids or
protect plants with fungicides will be affected by the soybean
growth stage in a field during the next three weeks. As plants
progress to the later reproductive stages (e.g., R5, R6, R7, etc.)
risk of yield loss to either of these pest concerns declines.
Currently, the soybean crop ranges from R3 to R5.
Grain Combine
Fires - Still a Burning Problem
It's a perfect day to start wrapping up the last full week of a
long, busy harvest. There's not a cloud in the sky. The crop is dry
and bountiful. The harvest has been as hectic as any other, but
fortunately with no breakdowns or any real problems! In fact, other
than checking the oil a few times, greasing bearings, and fueling
up, your combine hasn't missed a beat.
Predicting
soybean yields in NW Minnesota:
Sometimes helpful, always risky
Without question, we are experiencing some very hot, dry weather
this year, but it is questionable just how much this weather will
influence final soybean yields. A lot will depend on a field’s
available soil water at planting and timing of in-season
precipitation. Conjecture is commonplace, but we lack good evidence
from designed experiments in NW Minnesota to address these
questions.
Corn: Kernels or Not?
Corn plants for most of Minnesota have been short of moisture or
under high temperature stress for the past four weeks. Since most
fields are past tasseling and silking, one can now determine the
success of the pollination and fertilization process. The objective
here is to describe a simple method to determine the fertilization
success and to discuss the effect of stress on plant recovery and
grain yield.
< previous issue
next issue >
|
