Arthropod Management Tests 2009, Vol. 34
doi: 10.4182/amt.2009.C13
(C13)
GRAPE: Vitis spp.
EFFICACY OF INSECTICIDES AGAINST GREEN JUNE BEETLE, 2008
Donn T. Johnson
320 AGRI BLDG, Department of Entomology
University of Arkansas
Fayetteville, AR 72701
Phone: 479-575-2501
Fax: 479-575-2452
E-mail: [email protected]
Barbara A. Lewis
E-mail: [email protected]
Green June beetle (GJB): Cotinis nitida (L.)
Green June beetle (GJB) adults cause feeding damage to ripening apples, blackberries, blueberries, grapes and peaches and
larvae feed on green manure or compost applied to soil causing dislodging and desiccation of turf grass and field crop roots.
Given that only carbaryl is registered against GJB, the objective of this laboratory test was to compare the efficacy of
several synthetic insecticides and biopesticides (OMRI approved for organic farming) registered on fruit against GJB. On
24 Jul, GJBs were collected from fruit on apple trees and maintained on ripe fruit in a screened cage. Plastic window screen
measuring 12″ × 6″ was folded on itself to form a 6″ × 6″ pocket screen cage, the two sides were stapled closed, then ten
GJBs and a slice of ripe apple were placed inside the cage and the top edge stapled closed. Each treatment cage (replicate)
with GJBs and an apple slice was dipped in one of the treatment solutions (5 replicates) and hung on a wire inside the
insectary. At 24, 48 and 72 h after dipping, records were made of the proportion of GJB adults per screen cage that were
live (able to walk), morbid (probing elicits slight leg movement, but no walking) or dead. Data of the proportion of dead
GJB adults that feed on treated grapes were transformed by arcsine square root (proportion), analyzed with analysis of
variance and mean separation used the Waller-Duncan k-ratio t-test (raw means reported in the Tables below).
At 72 h after treatment on 24 Jul, the caged GJBs dipped in treatment solutions of NAI 2302 and Alverde killed > 87 % of
the GJB adults which were similar to Ecotrol (71%) but significantly more mortality than by MOI 201, Botanigard, QRD416 or the water check (all < 41%). Efficacy of Alverde was similar to Ecotrol and Aza-Direct (Table 1). The treatments
dipped on 25 July with Actara, Admire, Altacor, Battalion, Baythroid, Clutch, Danitol, and Sevin all killed 100% of the
GJB adults which were significantly greater than the < 51% killed by Ecotrol, Botanigard, Delegate and the water check
(Table 2). The last treatments of Aza-Direct or QRD-416 applied on 30 Jul did not differ from the water check (Table 3).
Table 1
Treatment or Formulation
Active ingredient(s)
NAI 2302 15 EC
Alverde
Tolfenpyrad
metaflumizone + 0.5%
MSO v/v
10% rosemary oil + 2%
peppermint oil
azadirachtin
1:500 dilution extract of
Chinese medicinal plants
plant oil of Chenopodium
ambrosioides
water
Beauveria bassiana
Ecotrol EC
Aza-Direct 1.2%
MOI 201
QRD-416 25%
Check
Botanigard ES
per 100 gpa
% dead after 72 h
27 fl oz
16 fl oz
100.0a
87.3ab
96 fl oz (3 qts)
70.9a-c
32 fl oz (2 pts)
25.6 fl oz
50.8b-d
40.9c-e
96 fl oz (3 qts)
9.1de
--64 fl oz (2 qts)
5.0e
0.0e
Means not followed by the same letter are significantly different (Waller-Duncan k-ratio
t-test, k-ratio = 100).
Data transformed by arcsine square root (proportion).
1
Arthropod Management Tests 2009, Vol. 34
doi: 10.4182/amt.2009.C13
Table 2
Treatment or Formulation
Active ingredient(s)
Actara 25%
Admire 2F
Altacor 35% ai
Battalion 0.2 EC
Baythroid 12.7%
Clutch 50 WDG
Danitol 2.4 EC
Sevin 4F
Ecotrol EC
thiamethoxam
imidacloprid
chlorantraniliprole
deltamethrin
cyfluthrin
clothianidin
fenpropathrin
carbaryl
10% rosemary oil +
2% peppermint oil
water
Beauveria bassiana
spinetoram
Check
Botanigard 22 WP
Delegate 25 WG
per 100 gpa
% dead after 72 h
3.5 oz
32 fl oz
4.5 oz
14.1 fl oz
3.2 fl oz
3 oz
10.677 fl oz
64 fl oz (2 qts)
96 fl oz (3 qts)
100.0a
100.0a
100.0a
100.0a
100.0a
100.0a
100.0a
100.0a
50.0b
--32 oz (2 lbs)
5 oz
12.0c
4.0d
2.0d
Means not followed by the same letter are significantly different (Waller-Duncan k-ratio
t-test, k-ratio = 100).
Data transformed by arcsine square root (proportion).
Table 3
Treatment or Formulation
Active ingredient(s)
QRD-416 25%
plant oil of Chenopodium
ambrosioides
azadirachtin
water
Aza-Direct 1.2%
Check
per 100 gal sol./A
96 fl oz (3 qts)
% dead after 72 hrs
30.0a
32 fl oz (2 pts)
---
Means not followed by the same letter are significantly different (Waller-Duncan
k-ratio t-test, k-ratio = 100).
Data transformed by arcsine square root (proportion).
2
0.00a
0.00a