pest management of japanese beetle and a study of stink bug injury on primocane-bearing caneberries...
DESCRIPTION
Talk by Laura Maxey at 2011 VSU Virginia Berry ConferenceTRANSCRIPT
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
Department of EntomologyVirginia TechBlacksburg, VA
Japanese Beetle (Popillia japonica Newman)
Chew holes in fruit Injured berries are more susceptible to
diseases
Skeletonize the leaves
Japanese Beetle Life Cycle
University of Nebraska Lincoln: http://elkhorn.unl.edu/epublic/pages/publicationD.jsp?publicationId=532
Stink Bugs (Hemiptera: Pentatomidae)
Adults emerge from ground debris in
spring
Most species have 2 generations/ yr
in VA
Both adults and nymphs feed
Polyphagous
Primocane-bearing Raspberry Cultivar Susceptibility to Japanese Beetle Presence and Fruit and Foliar Injury
Considered Raspberry Cultivars
Yellow Cultivars Anne and Fall Gold
Red Cultivars Autumn Bliss, Caroline, Dinkum, Heritage, Himbo
Top, and Prelude
Measured Responses
Number of JB on each raspberry cultivar
Marketable, Unmarketable, Percent Unmarketable, and Overall Yield of each cultivar
Defoliation of each cultivar
JB Counts 2007
JB Counts 2008
JB Counts 2009
Raspberry JB Count Summary Significant Differences
2007: ‘Prelude’ > ‘Anne’, ‘Caroline’, ‘Dinkum’, ‘Heritage’ & ‘Himbo Top’
2008: ‘Prelude’ > ‘Caroline’, ‘Dinkum’, & ‘Himbo Top’ 2009: ‘Prelude’ > ‘Caroline’, ‘Dinkum’, ‘Heritage’ &
‘Himbo Top’ 2009: ‘Fall Gold’ > ‘Himbo Top’
2007-2009 Trend More: ‘Prelude’, ‘Fall Gold’, and ‘Autumn Bliss’ Fewer: ‘Caroline’, ‘Himbo Top’, ‘Heritage’, and
‘Dinkum’
Raspberry Harvest 2007
Cultivar
Marketable Yield (g/m) * % Unmarketable *
Autumn Bliss 1717.8 ± 49.9 a 12.8 ± 0.8 c
Heritage 1642.5 ± 209.2 ab 24.5 ± 1.1 a
Caroline 1444.2 ± 155.3 abc 23.2 ± 1.7 ab
Himbo Top 1320.7 ± 96.6 abc 16.6 ± 0.8 bc
Prelude 1124.0 ± 177.2 abc 17.1 ± 2.1 bc
Dinkum 1034.8 ± 103.8 bc 18.2 ± 2.6 abc
Fall Gold 1014.7 ± 142.7 bc 16.4 ± 1.6 bc
Anne 899.9 ± 150.7 c 19.0 ± 1.6 abc* Values followed by the same letter in same column are not significantly different (Tukey's HSD (α=0.05)).
Raspberry Harvest 2008
Cultivar Marketable Yield (g/m) * % UnmarketableAutumn Bliss 1223.2 ± 49.6 a 19.7 ± 0.5
Heritage 1101.3 ± 102.2 ab 21.7 ± 1.3
Caroline 1069.5 ± 146.7 abc 23.2 ± 0.6
Dinkum 964.2 ± 126.3 abcd 22.1 ± 2.4
Himbo Top 692.5 ± 119.1 bcd 22.4 ± 1.9
Fall Gold 655.2 ± 110.4 bcd 24.2 ± 3.4
Anne 598.0 ± 155.0 cd 19.1 ± 2.2
Prelude 565.7 ± 81.5 d 22.2 ± 3.5* Values in same column followed by the same letter are not significantly different (Tukey's HSD (α=0.05)).
Raspberry Harvest 2009
Cultivar Marketable Yield (g/m)* % Unmarketable **
Heritage 1922.9 ± 143.4 a 14.8 ± 0.7 bc
Caroline 1685.3 ± 167.4 ab 19.4 ± 1.2 a
Autumn Bliss 1590.3 ± 101.5 ab 12.5 ± 0.8 c
Himbo Top 1566 ± 124.5 ab 18.8 ± 1.3 ab
Dinkum 1532.4 ± 120.3 ab 13.5 ± 0.6 c
Fall Gold 1333.9 ± 162.7 b 13.7 ± 0.5 c
Prelude 1236.9 ± 111.8 b 13.4 ± 0.9 c
Anne 1115.4 ± 186.9 b 18.0 ± 1.2 ab* Values followed by the same letter are not significantly different (Tukey's HSD (α=0.05))** Values followed by the same letter are not significantly different (Tukey's HSD (α=0.05) following [ArcSine (√x)] transformation)
Raspberry Harvest Summary Significantly Greater Marketable Yield
‘Autumn Bliss’, ‘Heritage’, and ‘Caroline’ Significantly Less Injured Fruit
‘Autumn Bliss’, ‘Fall Gold’, ‘Himbo Top’, ‘Heritage’, ‘Dinkum’, and ‘Prelude’
2007-2009 Trend ‘Autumn Bliss’, ‘Heritage’, and ‘Caroline’ >
Total Yield ‘Prelude’, ‘Anne’, and ‘Fall Gold’ < Total
Yield
Raspberry Defoliation Summary
2008
‘Prelude’ > ‘Dinkum’, ‘Caroline’, ‘Heritage’,
and ‘Anne’
2009
‘Prelude’ and ‘Fall Gold’ > ‘Caroline’ and
‘Anne’
Raspberry Cultivar Summary JB Infestation
‘Prelude’ > ‘Anne’, ‘Caroline’, ‘Dinkum’, ‘Heritage’, & ‘Himbo Top’
Harvest Greater Marketable and Overall Yield: ‘Autumn Bliss’,
‘Heritage’, & ‘Caroline’ Less Injured Fruit: Autumn Bliss’, ‘Fall Gold’, ‘Himbo Top’,
‘Heritage’, ‘Dinkum’, & ‘Prelude’ Defoliation
2008: ‘Prelude’ > ‘Dinkum’, ‘Caroline’, ‘Heritage’, & ‘Anne’
2009: ‘Prelude’ & ‘Fall Gold’ > ‘Caroline’ & ‘Anne’
Geranium Toxicity to JB
Geranium Toxicity to JB
48 hours exposure to either: Potted Autumn Bliss Raspberry Plant Potted Zonal Geranium
Groups of 5 beetles were bagged on Autumn Bliss raspberry canes for 24 hours
Estimated Percent Defoliation
Geranium Toxicity to JB
Geranium and Raspberries Two JB were contained with:
Geranium petal ‘Prelude’ raspberry leaf
Geranium or Raspberries One JB was contained with either Geranium petal
or ‘Prelude’ raspberry leaf After 24 hours, each JB placed in container with
just ‘Prelude’ leaf Defoliation
The last leaf exposed in both experiments
Results
Caged Experiments Previous Exposure to Geraniums Significantly Reduced
Estimated Defoliation to ‘Autumn Bliss’ (7.0 to 4.4 %)
Bioassay Geranium and Raspberry Significantly reduced defoliation (8.7 to 3.3 %) but JB
preferred to be on ‘Prelude’ raspberry leaf
Bioassay Geranium or Raspberry Reduced defoliation (8.4 to 4.9 %) but not significantly
Study of Stink bugs and Their Injury to Raspberry
Percent of Stink Bug Species Present
48.1
20.3
16.3
9.5
2.31.42.0
Euschistus servus Cosmopepla lintneriana Acrosternum hilare Euschistus tristigmus
Euschistus variolarius Thyanta custator accerra Minor species
Leaves
Sepal
Raspberry
Injury
Video
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
Overall Conclusions
‘Prelude’ raspberries were preferred by JB
‘Autumn Bliss’ produced greatest yields with less injury
Previous exposure to geraniums reduced raspberry defoliation
Stink bug feeding injury is identified as holes between drupelets
THANK YOU!!!
IR-4 and the Small Fruit Consortium $$
Faculty and Staff at VT
Kentland Farm Crew
Master Gardeners
My Friends and Family
Questions? email: [email protected] : (540)-599-5287