Category Archives: Insects

My Plans for Plant Bugs in Cotton during 2018

Author: Scott Stewart, IPM Extension Specialist Comments Off on My Plans for Plant Bugs in Cotton during 2018

As often happens, there is a flurry of activity in early planted cotton. Plant bugs often stack up there first until other cotton starts squaring. I’ve also had reports of more clouded plant bugs in some areas than we’ve been seeing recently.

Pretty much every year I start the season my suggesting the use of Centric and full-labeled rates of imidacloprid prior to flowerin. I’m sticking to the plan for the first spray or two, but Continue reading

Print Friendly, PDF & Email

Moth Trapping Results and Other Reminders

Author: Scott Stewart, IPM Extension Specialist Comments Off on Moth Trapping Results and Other Reminders

A reminder that weekly moth tap catches for corn earworm (bollworm), tobacco budworm, and southwestern corn borer can be found under the quick links menu under Moth Trapping Data.

With the exception of southwestern corn borers (SWCB) in some locations , we’ve not been catching many moths. Now would be a good time to scout the whorls of any non-Bt corn for the presence of corn borers. Remember that the treatment threshold during the whorl stage is when 5% of plants are infested with SWCB.

Also remember that UT Pest Guides are available at http://guide.utcrops.com/. They provide the latest information of pest identification, sampling, and management in a mobile-friendly, app-like format.

Print Friendly, PDF & Email

Confusing Cutworm with Armyworms?

Author: Scott Stewart, IPM Extension Specialist Comments Off on Confusing Cutworm with Armyworms?

We’ve had a pretty good run of cutworms in some fields, but we’ve also had some mistaken identity where armyworms have actually been the problem. This has been in situations where wheat cover crop was infested with armyworms. If the cover crop is killed close to or after planting, there is potential for armyworms to feed on emerging seedlings and cause injury similar to cutworms. I’d recommend using a pyrethroid Continue reading

Print Friendly, PDF & Email

Armyworms in Wheat etc.

Author: Scott Stewart, IPM Extension Specialist Comments Off on Armyworms in Wheat etc.

Be alert for true armyworm infestations in wheat, and these larvae may also migrate into soybean, corn or other crops from adjacent wheat fields of grassy ditch banks. They might even be on weedy grasses or wheat or other grasses used in cover crops, and this could cause a problem if Continue reading

Print Friendly, PDF & Email

Scout Corn for Cutworms

Author: Scott Stewart, IPM Extension Specialist Comments Off on Scout Corn for Cutworms
Black cutworm and cut plant

Much of our corn took a long while to emerge, and there has been opportunity for cutworms to infest fields since planting. Hence, make sure to scout for cutworm injury while checking stands. UT recommends treating for cutworms in corn when 5% or more of plants are injured or when you find 2 or more larvae per 100 plants. Synthetic pyrethroids are generally used to control infestations. Recommended insecticides and rates are listed here.

Continue reading

Print Friendly, PDF & Email

Planning Ahead for Thrips Control in Cotton

Author: Scott Stewart, IPM Extension Specialist Comments Off on Planning Ahead for Thrips Control in Cotton

I’m re-running this post as we start planting cotton in Tennessee. If you believe the thrips forecast models developed by NCSU, and my experience is that it works well, then thrips populations are behind schedule.  Thus, if we can get some cotton planted in the next 7-14 days, there is a good chance the cotton can outrun thrips before populations peak. Of course, weather is still a significant factor in how badly thrips impact seedlings.

Thrips Infestation Predictor for Cottonhttp://climate.ncsu.edu/CottonTIP

Our options for thrips control in Tennessee are mostly unchanged, but there are some key points Continue reading

Print Friendly, PDF & Email

Easing off the clutch: 2018 cotton planting

Author: Tyson Raper, Cotton & Small Grains Specialist Comments Off on Easing off the clutch: 2018 cotton planting

I’ve visited with several over the past few days who either started planting yesterday (4/30), who plan to begin today (5/1), or who will be planting by tomorrow (5/2).  While we have a few very early planting-date trials established here in Jackson, none of our large-plot trials have been planted and none of our small-plot work requiring normal planting dates have been planted either.  That will change for my program today (5/1). Continue reading

Print Friendly, PDF & Email

Sorghum Hybrids with Tolerance to Sugarcane Aphid

Author: Scott Stewart, IPM Extension Specialist Comments Off on Sorghum Hybrids with Tolerance to Sugarcane Aphid

Linked below is a list of sorghum hybrids that have exhibited at least some tolerance to the sugarcane aphid. This was shared by Brent Bean of the Sorghum Checkoff program. To be included on this list, the seed company first must recommend the hybrid as having sugarcane aphid tolerance. Second, there must be independent data, usually from university or USDA trials, that confirm tolerance. Check the Sorghum Checkoff website under hybrid selection for updates to the list. It is important to note that some hybrids will have more tolerance than others. Also, just because a hybrid in on the list does not mean it is suitable for our geography.

2018 Sorghum Hybrids with SCA Tolerance

 

Print Friendly, PDF & Email