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Articles by Clemson Entomologist
South Carolina: Soybean Pests Have A Healthy Appetite Right Now
Velvetbean caterpillar on soybeans. Photo: Jennifer Bearden, University of Florida Charles Davis, county agent in Calhoun County, found stink bugs in his observations but reported “damage was hard to find in the fields” he walked. Charles also reported that “a lot of final growth regulator and insect sprays are going out this week as a parting shot. On the non-insect side, I see a lot of boll rot in some fields but also a lot of mildew. “Hopefully, we will get some better weather this week.
South Carolina: Still Reasons To Scout Cotton - And More So In Soybeans
Redbanded stink bug. Photo: University of Tennessee Tom Smith, local consultant, reported that “a number of early planted [cotton] fields [are done] until defoliation, and a number of later planted fields may need 1 or 2 sucking-bug sprays and bollworm protection. We treated a few fields last week for target spot and mildew.
South Carolina Cotton: Focus On Stink Bugs But Be Aware Of Bollworms, Too
Adult green stink bug. Jonathan Croft, county agent in Orangeburg County, reported that “cotton around the seventh week of bloom I checked this week in Orangeburg and Dorchester Counties was above threshold for stink bug injury. I also got some reports of bollworms/eggs in cotton in the area. I didn’t see many in fields I checked. “Soybeans are about the same as last week. Still a mix of worms and a few green stink bugs.
South Carolina: Cotton, Soybean Insects Plenty Active
Bollworm burrowing into cotton boll. Photo: University of Tennessee Jonathan Croft, county agent in Orangeburg County, reported that he “checked soybeans on the edge of Calhoun and Orangeburg Counties this morning [yesterday] and found about 50% threshold on soybean looper and kudzu bug nymphs. Also picked up a few immature green stink bugs and a few velvetbean caterpillars. These were in beans setting pods. No podworms.
South Carolina Cotton: Bollworms Demand Attention But Not Necessarily Treatments
Zea Moth, Bollworm. Photo: Kate Harrell, Texas AgriLife Captures of bollworm moths in pheromone traps have decreased some, as this flight out of corn subsides. The recent widespread rain storms will wet the soil and undoubtedly allow more moths to emerge from corn acres. The generation that has cycled through early cotton and other hosts after corn will likely make another showing as moths also. So, there might be another round with bollworm in another week or two. We will see.
South Carolina Cotton: Bollworm Moths Active…But Will It Matter?
Charles Davis, county agent in Calhoun County, reported that it is difficult for him to find aphids in cotton now because of the natural fungus taking them out. He saw plenty of lady beetle pupal “skins” attached to leaves that completed their development after doing all they could in eating aphids. Fleming McMaster, local crop consultant, reported earlier this week that he is triggering thresholds for stink bugs in cotton he has in the third week of bloom.
South Carolina Cotton: Plenty Of Insects But Do You Need To Spray?
Tarnished plant bug up close. Photo: Mississippi State University Drake Perrow, producer and consultant in Calhoun County, said earlier this week that he is picking up some fungus on cotton aphids but also is seeing spider mites building. Charles Davis, county agent in Calhoun County, reported seeing symptoms of the Cotton Leafroll Dwarf Virus (CLRDV) transmitted by cotton aphid.
South Carolina Cotton: Bollworm Trap Counts Bump Up
Bollworm in cotton bloom. Photo: Gus Lorenz, University of Arkansas Drake Perrow, producer and consultant in Calhoun County, commented this week that “aphids seem to be enjoying this weather.” I agree with Drake, as aphids seem to still be building, despite the news of aphid fungus in Georgia. Charles Davis, county agent in Calhoun County, reported that he is seeing “aphids, aphids, and more aphids! I did see a few mummies so hopefully they will be crashing soon.
South Carolina Cotton: It’s Getting Easier To Find Pests
Match head cotton squares. Photo: Justin Ballew, Clemson University Across the state: Jonathan Croft, county agent in Orangeburg County, reported that he is seeing a few aphids in older cotton. Charles Davis, county agent in Calhoun County, had the same report as Jonathan…just aphids. Drake Perrow, consultant and producer in Calhoun County, reported that he is seeing large hatch outs of immature grasshoppers and building aphids on some herbicide-stressed cotton at pinhead square.
South Carolina Cotton: Grasshoppers Remain The Main Focus
Image from University of Florida Grasshoppers are still out in force, but heavy acephate rates and Dimilin at 2 fl oz/acre will suppress adults and control immatures and control tobacco thrips. If you don’t have issues with grasshoppers and false chinch bugs, a product like Radiant is a great choice for final seedling sprays for thrips because it will not flare spider mites and aphids like acephate will.
South Carolina: Three Key Insects Right Now In Cotton, Soy
June cotton fighting its way through heat, wind, blowing sand and thrips. Photo: Seth Byrd, OSU Cotton Specialist First, reports from around the state: Jonathan Croft, county agent covering Orangeburg, Berkeley and Dorchester Counties, is hearing “no complaints” in his area right now, and everyone is “just thankful for the rain.” Charles Davis, county agent covering Calhoun and Richland Counties, reported “all is fairly quiet in Calhoun County.
South Carolina: Three Insect Species Gaining Attention In Cotton, Soy
False chinch bugs. Photo: University of Tennessee Jonathan Croft, county agent in Orangeburg County, said has “heard about some thrips on some cotton. Most is slow growing with these cool nights. Dry conditions are also starting to slow planting of cotton in some fields.” Jay Crouch, county agent in Newberry County, reported that “cotton planting (is) just getting up to speed my way.
South Carolina Cotton: Thrips Gain A Head Start In Mid-April Plantings
Thrips damaged cotton. Photo: Andrew Sawyer, University of Georgia Any emerged cotton that probably wishes it still had its winter clothes out. It is cold at night right now, so cotton is not growing well. The thrips infestation predictor for cotton tool told us to not plant early in the southern portion of the state. But I did it anyway in my trials in an attempt to put some research cotton through the peak thrips population.
South Carolina: Cotton Pests Mostly Finished But Soy Insects Need Attention
Row-Crop Field Day – Rescheduled Because of the threat of Hurricane Dorian moving up the coast and its predicted location off the coast of South Carolina on Wednesday/Thursday, we have decided to reschedule the Row-Crop Field Day at Edisto REC scheduled for September 5. The new date will be a week later on September 12. Peanuts will be covered in the AM tour, and all other crops (cotton, soybean, etc.) will be covered in the PM tour. Pesticide license and CCA credits will be offered.
South Carolina Cotton: Focus On Spider Mites
Spider Mites. Photo: Mississippi State University Jay Crouch, ag agent in Newberry County – and who also covers much of the upstate – reported that “kudzu bug immatures are building in soybeans with very low incidence of fungus. We’ll have a field or two treated early next week. Greene cloverworm populations are also increasing, but foliage loss is still below threshold. Found a couple of velvetbean caterpillars yesterday but nothing exciting yet.
South Carolina Cotton: Bollworms Remain Mostly Nonexistent - No Complaints There
Across The State Jonathan Croft, Extension Ag Agent covering Orangeburg County, reported some shake samples in soybeans with “mostly VBC and immature green stink bugs. These soybeans were right on the Dorchester-Orangeburg County line. VBC and stink bugs were just under threshold.” Chris Talley, Extension Ag Agent in Anderson County, noted that it is “too dry up here…nothing for them to feed on” when I asked about insect activity up his way.
South Carolina Cotton: Still In The “Stink Bug Month”
Stink bug in cotton. Photo: Kate Harrell, County Extension Agent- Integrated Pest Management Jay Crouch, county AG agent covering Newberry County and much of the Upstate, reported that he is “starting to find fungus in kudzu bugs in soybeans. Everything else as expected this time of the year.” James Thomas, local consultant, reported picking up velvetbean caterpillars and some small fall armyworms in peanuts almost a month earlier than normal.
South Carolina Cotton: Focus On Stink Bugs
Reports from around the state… Charles Davis, county ag agent covering Calhoun and Richland Counties, reported that “other than increased stink bug migration from corn to cotton, all is quiet. Spooky really.
South Carolina Cotton: Focus On Stink Bugs Now
Stink bug in cotton. Photo: Kate Harrell, County Extension Agent- Integrated Pest Management We have observed aphids crashing in most fields due to the naturally occurring fungus. Help came late from Mother Nature, but we will take it. Spider mites have increased quite a bit lately and have become more noticeable again with all of the hot, dry weather. So, don’t stop looking for spider mites.
South Carolina Cotton: With Insects, Shift Your Focus Now
Tarnished Plant Bug. ©Debra L Ferguson Stock Photography Drake Perrow, consultant in Calhoun County, reported that he observed beet armyworms on pigweeds at noticeable numbers. William Hardee, county agent covering Horry and Marion Counties, reported that “brown and southern green stink bugs are bad in {his) area. Seeing some ear curl on corn and leaves wilting in tobacco.
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