In the past weeks, a few strawberry growers have expressed their concern about the possibility of cyclamen mite infestations. After visiting some strawberry farms in the Chesapeake area this week, I found symptoms of cyclamen mite damage in a few fields. Because of the small size of the mites, I took leaf samples from the symptomatic plants and confirmed the presence of the mites in the laboratory.
The cyclamen mite is a serious pest of strawberries. It has
been reported in most strawberry-producing states. Cyclamen mites are tiny
mites (0.001 in long) that feed on the tissue of nonexpanded and newly unfolded
leaves in the strawberry plants. Adults and immatures of the cyclamen mite are
considerably smaller than two-spotted spider mites and cannot be easily seen
with the naked or a hand lens. Symptoms of cyclamen mite infestation include
severely crumpled and crinkled leaves, as well as stunted plants.
The presence of cyclamen mites was confirmed mostly on ‘Ruby June’ strawberries, but they can infest any strawberry cultivar. Strawberry growers in the Virginia Beach metropolitan area and the eastern shore should beware of the presence of this pest mite in their field. There are very few miticides available for the control of cyclamen mites. Unfortunately, the same products used for the control of two-spotted spider mites do not always provide control for cyclamen mites. The best performing product against this pest is Portal (fenpyroximate). Agri-mek (abamectin), is also labeled for cyclamen mites. Despite being miticides, Acramite and Magister are not labeled for control of cyclamen mite and may not provide enough protection against it.
Dr. Lorena Lopez Department of Entomology Virginia Tech | Eastern Shore Agricultural Research and Extension Center (ESAREC) (954) 529 9042 | firstname.lastname@example.org
For greater soybean yields, one of the best things that you can do is walk your fields. Many problems reveal themselves during the summer. Actions taken or not taken can be very noticeable. By walking fields, we can see what’s working and what’s not working. Certain problems can be solved, some cannot. For those that cannot be solved this year, we can do better next season by understanding why we have the problem. Therefore, a review of how to diagnose your crop will likely beneficial.
A few years ago, I published “Troubleshooting The Soybean Crop“. Although a little dated, most of the information is still good. This publication will guide you through how to go about diagnosing problems, includes a vegetative- and reproductive-stage outline with lots of photos, and also includes a sample crop scouting and diagnostic form. You can download a view a PDF copy, or contact me – I still have a few hard copies left. By following some general guidelines, one can become quite good at diagnosing problems. Below is a summary.
First, documenteverything! Memories tend to fade. We often forget or overlook details. You can document by taken notes (many phone apps or iPad/tablets work well for this). Make a recording. Take pictures – this is especially useful when you need help – and send those photos to others.
PRELIMINARY FACT FINDING. You can obtain plenty of information before you even get to the field. Although I call this preliminary (as if you’ve not seen the problem), you may need to go back to the office to refresh your memory of what you did. Information that can be acquired beforehand or back in the office includes:
Pest Management Information
Tillage and Other Cultural Practices
THE FIELD VISIT
Take all materials and equipment needed (e.g., phones, paper, shovel, plastic bags, soil probes, etc.)
Windshield/Whole Field Investigation
Take Appropriate Plant or Soil Samples
Interaction with Others
ANALYSIS OF DATA AND FINDINGS
Interacting Factors/More Than One Problem
DRAWING A CONCLUSION. Review the facts and data. Eliminate unlikely causes. Validate likely causes. You may be able to drawn a conclusion in the field, but lab analysis may be needed.
FOLLOW UP. Revisit the field. If you took corrective action, did it work? Why or why not?
Due to impending rain Tuesday and Wednesday and already saturated soils, the Eastern Shore AREC field day scheduled for Wednesday, September 13, 2017 has been canceled. Let’s hope Hurricane Irma keeps tracking further west. We certainly do not need any more rain!