Whats bugging you. Articles concerning insects on field crops in Wisconsin http://ipcm.wisc.edu/WCMNews/tabid/53/BlogId/19/Default.aspx en-US cullen@entomology.wisc.edu webadmin@hort.wisc.edu Sat, 30 Aug 2008 09:03:03 GMT Sat, 30 Aug 2008 09:03:03 GMT http://backend.userland.com/rss Blog RSS Generator Version 3.2.0.29758 Soybean aphid populations have not yet “crashed”. As of the week of August 18th, soybean aphid populations have continued to flourish and increase beyond threshold in some areas of Wisconsin. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/624/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=624 Thu, 21 Aug 2008 21:38:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=624 Western bean cutworm (WBC) moth flight, egg hatch and larval development underway in Wisconsin. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/613/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=613 Thu, 07 Aug 2008 17:41:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=613 On July 23rd, the U.S. EPA approved a Section 18 request by the Wisconsin Department of Agriculture Trade and Consumer Protection (WI DATCP) and UW Madison Entomology Department for the use of the insecticide, Coragen (DuPont), in the state of Wisconsin. Use of Coragen on sweet corn is targeted for late-planted sweet corn that is historically susceptible to migrating Corn Earworm (CEW) moths that cause considerable damage to sweet corn ears. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/608/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=608 Thu, 24 Jul 2008 22:40:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=608 This week soybean aphid populations have increased noticeably. That is a relative term in this case. In some areas such as Dodge and Sauk Counties, this increase is from near zero activity to field averages of 10 aphids/plant and 30-60 aphids/plant. In other areas however, West Central and East Central Wisconsin for example, higher populations are starting to be reported closer to Economic Threshold in a few fields. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/606/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=606 Thu, 24 Jul 2008 19:50:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=606 This could be one of those years when it pays to scout corn fields for silk clipping caused by Western and Northern corn rootworm beetles. Both species are attracted to pollinating fields and are capable of clipping silks prior to fertilization resulting in poor ear fill. The concern this year would be over variable planting dates. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/600/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=600 Thu, 17 Jul 2008 18:34:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=600 Corn earworm moth flights have been high for the past three weeks in Wisconsin, as well as IL, IN and IA. During the last week in June, WI DATCP pest survey reported high average nightly pheromone trap catches ranging from 2 to 30 moths at locations including Cashton, Janesville, Lancaster, Manitowoc, Tomah and Sparta. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/584/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=584 Wed, 02 Jul 2008 19:16:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=584 We know the importance of scouting new seeding alfalfa which is particularly sensitive to potato leafhopper feeding damage. While corn and soybean prices are high, hay and forage values have increased in a tight supply market. This is not the year to fall behind on potato leafhopper scouting. Both new seeding and established stands should be monitored closely by regular sweep net scouting. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/583/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=583 Wed, 02 Jul 2008 19:10:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=583 I received two reports of slug feeding on corn over the last week, with questions about this occasional crop pest. One report came from Ted Bay, UW-Extension Grant County in southwestern WI. Additionally, Paul Sturgis, Croptech Agronomics, reported slug damage in corn fields from his area in north central WI (northern Wood, western Marathon, northern Clark and southern Taylor counties). http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/582/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=582 Wed, 02 Jul 2008 19:07:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=582 Soybean aphids made their debut in early vegetative soybeans in Wisconsin over the last two weeks. Reports in this article are from V2 to V4 soybeans. Populations are not of economic concern at this time. Weekly soybean aphid scouting should begin by late vegetative soybean growth stage and before early reproductive stage (beginning bloom). It is a good idea to monitor soybean fields for arrival of soybean aphid and colonization in your fields while checking soybean stands. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/578/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=578 Wed, 25 Jun 2008 19:32:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=578 Degree Day accumulations suggest the southern ½ of Wisconsin is at, or just past peak European corn borer flight and the most opportune treatment timing (if needed) may be starting in southern Wisconsin. Spot-check earliest planted corn because it is more attractive to female first generation European corn borer moths to lay eggs. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/575/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=575 Mon, 23 Jun 2008 19:54:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=575 There have been a few reports of armyworm damage on corn planted after a small grain cover crop or in dense weed growth. This is not out of the ordinary for this time of the year. But it does make you wonder what is happening in wheat. I’ve noticed some lodging of wheat from recent storms. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/572/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=572 Thu, 19 Jun 2008 17:18:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=572 There has not been any widespread insect problems reported lately, but there have been some isolated reports of a few different problems. Alfalfa weevil is one that should be mentioned. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/571/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=571 Thu, 19 Jun 2008 17:15:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=571 Shawn Conley and John Gaska, Dept of Agronomy, reported on the potential for reduced soybean seed quality this year and their concern for planting in cool wet soils. This article is just a quick reminder that seedcorn maggot may also be a contributing factor. Seedcorn maggot injury is often more severe during a cool/wet growing season and soybean are more susceptible to maggot injury than corn. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/556/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=556 Wed, 11 Jun 2008 18:31:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=556 It looks like we have finally turned the corner and are getting the warm weather we all hoped for. When the fields dry, a lot of us will be walking corn looking for early season problems. One thing is certain; you will find some insect injury. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/555/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=555 Wed, 11 Jun 2008 18:26:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=555 Figure 1, current through June 12th and forecasted through June 17th shows western corn rootworm egg hatch has begun in WI. During this period 1st-2nd instar rootworm larvae will be hatching in south central, southeastern, southwestern WI. East central and Northwestern WI larval hatch will follow suit. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/553/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=553 Wed, 11 Jun 2008 18:18:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=553 In the southern part of Wisconsin we have reached or exceeded 300 weevil degree days and damage reports have been on the quiet side. This could be a result of low weevil populations or a weather-friendly cutting schedule. If it was the latter, it might be worth some time to spot check fields for signs of damage to second crop regrowth. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/541/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=541 Thu, 29 May 2008 15:54:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=541 Now isn’t the time we normally think about widespread armyworm damage in corn. However, it is the time when migrating moths are moving into the state and may cause damage to scattered seedling corn fields when/if field conditions are favorable. This spring migration is unpredictable in terms of incidence and severity. http://ipcm.wisc.edu/WCMNews/tabid/53/EntryID/540/Default.aspx cullen@entomology.wisc.edu http://ipcm.wisc.edu/Default.aspx?tabid=53&EntryID=540 Wed, 28 May 2008 20:52:00 GMT http://ipcm.wisc.edu/DesktopModules/Blog/Trackback.aspx?id=540