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Pest Management of Japanese Beetle and a Study of Stink Bug Injury on Primocane-Bearing Caneberries in Southwest Virginia
- 1. Department of Entomology Virginia Tech Blacksburg, VA PEST MANAGEMENT OF JAPANESE BEETLE (COLEOPTERA: SCARaBaEIDAE) AND A STUDY OF STINK BUG (HEMIPTERA: PENTATOMIDAE) INJURY ON PRIMOCANE-BEARING CANEBERRIES IN SOUTHWEST VIRGINIA Laura Maxey
- 3. Injured berries are more susceptible to diseases
- 6. Most species have 2 generations/ yr in VA
- 7. Both adults and nymphs feed
- 10. Anne and Fall Gold
- 11. Red Cultivars
- 13. JB Counts 2007
- 14. JB Counts 2008
- 15. JB Counts 2009
- 16. Raspberry JB Count Summary Significant Differences 2007: âPreludeâ > âAnneâ, âCarolineâ, âDinkumâ, âHeritageâ & âHimbo Topâ 2008: âPreludeâ > âCarolineâ, âDinkumâ, & âHimbo Topâ 2009: âPreludeâ > âCarolineâ, âDinkumâ, âHeritageâ & âHimbo Topâ 2009: âFall Goldâ > âHimbo Topâ 2007-2009 Trend More: âPreludeâ, âFall Goldâ, and âAutumn Blissâ Fewer: âCarolineâ, âHimbo Topâ, âHeritageâ, and âDinkumâ
- 20. Raspberry Harvest Summary Significantly Greater Marketable Yield âAutumn Blissâ, âHeritageâ, and âCarolineâ Significantly Less Injured Fruit âAutumn Blissâ, âFall Goldâ, âHimbo Topâ, âHeritageâ, âDinkumâ, and âPreludeâ 2007-2009 Trend âAutumn Blissâ, âHeritageâ, and âCarolineâ > Total Yield âPreludeâ, âAnneâ, and âFall Goldâ < Total Yield
- 21. Raspberry Defoliation Summary 2008 âPreludeâ > âDinkumâ, âCarolineâ, âHeritageâ, and âAnneâ 2009 âPreludeâ and âFall Goldâ > âCarolineâ and âAnneâ
- 22. Raspberry Cultivar Summary JB Infestation âPreludeâ > âAnneâ, âCarolineâ, âDinkumâ, âHeritageâ, & âHimbo Topâ Harvest Greater Marketable and Overall Yield: âAutumn Blissâ, âHeritageâ, & âCarolineâ Less Injured Fruit: Autumn Blissâ, âFall Goldâ, âHimbo Topâ, âHeritageâ, âDinkumâ, & âPreludeâ Defoliation 2008: âPreludeâ > âDinkumâ, âCarolineâ, âHeritageâ, & âAnneâ 2009: âPreludeâ & âFall Goldâ > âCarolineâ & âAnneâ
- 23. Geranium Toxicity to JB
- 25. Potted Autumn Bliss Raspberry Plant
- 27. Groups of 5 beetles were bagged on Autumn Bliss raspberry canes for 24 hours
- 29. Results Caged Experiments Previous Exposure to Geraniums Significantly Reduced Estimated Defoliation to âAutumn Blissâ (7.0 to 4.4 %) Bioassay Geranium and Raspberry Significantly reduced defoliation (8.7 to 3.3 %) but JB preferred to be on âPreludeâ raspberry leaf Bioassay Geranium or Raspberry Reduced defoliation (8.4 to 4.9 %) but not significantly
- 30. Study of Stink bugs and Their Injury to Raspberry
- 31. Percent of Stink Bug Species Present
- 32. Leaves
- 33. Sepal
- 34. Raspberry
- 35. Injury
- 36. Video
- 37. Stink Bug Conclusions Brown stink bug, twicestabbed stink bug, green stink bug, and dusky stink bug were the main species present 2008-2009 Stink bugs feed on multiple parts of raspberry plants Injury to ripening and ripened berries is identified as holes between the drupelets and ill tasting droppings BMSB threat Polyphagous Nymphs and adults can cause injury Increasing populations in Virginia
- 38. Overall Conclusions âPreludeâ raspberries were preferred by JB âAutumn Blissâ produced greatest yields with less injury Previous exposure to geraniums reduced raspberry defoliation Stink bug feeding injury is identified as holes between drupelets
- 40. Master Gardeners
Hinweis der Redaktion
- Hello, Thank you for coming to my defense. I am going to talk about the research I conducted in primocane-bearing caneberries 2007-2009.
- The main pest of interest for this study has been the Japanese beetle. In brambles, adult Japanese beetles chew small holes in the fruit and skeletonize the leaves of the plants. Ripened berries exposed to sunlight are favored. Not only does this damage make the fruit unmarketable, it also makes the plants susceptible to diseases.
- Here is the Japanese beetleâs life cycle. As you can see as generalization adults are present June through August. In southwest Virginia, we start seeing adults the third week of June throughout AugustThey are therefore present early in the primocane-bearing caneberry harvest.
- Another, group of pests of caneberries are the complex of stink bugs. Stink bugs overwinter as inactive adults beneath ground debris and emerge in the spring to begin feeding on multiple hosts. The most common stink bugs in Virginia have 2 generations per year.They are present during caneberry harvest. This pest familyâs impact on bramble production is not completely clear; however, they have been observed feeding on caneberries. Both Adults and nymphs use their piercing-sucking mouthparts to extract plant fluids.Immature fruiting structures are preferred and injury can be major.Also, the offensive odor that stink bugs produce has been known to make the berries distasteful.
- The study was conducted at Kentland Farm in southwest VA. I considered 8 cultivars of raspberries including Anne, Autumn Bliss, Caroline, Dinkum, Fall Gold, Heritage, Himbo Top and Prelude. All the varieties at listed here are primocane-bearing which also sparked interests in the research.
- I counted the number of JB present within the treated plots.We also harvested the fruit within each plot and separated the marketable from unmarketable berries.A berry was considered unmarketable if it had any injury/ it wasnât something youâd find at the grocery store.Also, I looked at the amount of defoliations within each plot.
- The decrease in JB populations can be seen on these y-axis
- Autumn bliss is desirable: greater marketable yield and less injured fruitYellow raspberry cultivars less overall fruit but Fall gold was less suseptibility to injury than AnnePrelude less overall yield and also had less injured fruit in 2009
- Geraniums are toxic to JB so I wondered if they could be used to reduce JB activity on raspberries
- I conducted field experiments in 2007 to see if previous exposure to geraniums reduced JB defoliationBeetles were either caged with a potted raspberry or geranium plant for 48 hoursThey were then removed and bagged onto raspberry canes.5 beetles were in each bag.After 24 hours, the beetles were removed and defoliation was estimated.
- In 2009, I conducted laboratory tests exploring geraniums effeicacy as Japanese beetle controlIn the first experiment, two JB were placed in with a âPreludeâ raspberry leaf an a zonal geranium flower. Had 25 reps.After 24 and 48 hours the location of the JB was noted. After 48 hours, the defoliation of the raspberry leaf was measured and compared to th defoliation of prelude raspberry leaves that did not have geranium flowers in with them. In the second experiment, JB were either contained with a raspberry leaf or a geranium flower. After 24 hours, the JB were removed and put in fresh containers that contained fresh prelude leaves.After another 24 hours, the defoliations were measured and compared.
- Since prelude is preferred cultivar, choice tests with other cultivars JB might choose to be on geranium.
- E. Servus made up almost half
- When they fed on leaves, they were feeding on the veins.
- Here we see them feeding on the sepals
- Anytime the I saw the stink bugs feeding on the raspberries, they were feeding in between the droplets. Therefore, any resulting injury would be in between the droplets.
- I then went back to images I took in 2008 I found the holes between the drupelets that can be identified as stink bug injury.This first image shows small holes around the drupelet which probably caused the dupuplet to cave in. The second image shows what I consider to be the main injury caused by stink bugs, their feces. People have reported popping a berry in their mouth and tasting stink bugs..which is from their feces..yum.