PMR REPORT #. SECTION E: CEREAL, FORAGE CROPS, and OILSEEDS.
ICAR: 61006537. CROP: Soybeans (Glycine max (L.) Merr), Variety SW3308.
PEST:.
PMR REPORT #
CROP: PEST:
SECTION E: CEREAL, FORAGE CROPS, and OILSEEDS ICAR: 61006537
Soybeans (Glycine max (L.) Merr), Variety SW3308 European chafer, Rhizotrogus majalis, Razoumowsky
NAME AND AGENCY: SCHAAFSMA A W, PAUL D E and PHIBBS T R Ridgetown College, University of Guelph, Ridgetown, Ontario, N0P 2C0 Tel: (519)-674-1624; Fax: (519) 674-1600; Email:
[email protected] TITLE:
EUROPEAN CHAFER CONTROL WITH SEED TREATMENTS IN SOYBEANS
MATERIALS: MAXIM XL 324FS (fludioxonil + mefenoxam, 231 + 93 g ai/L); COUNTER 15G (terbufos, 15% w/w); AGROX DL Plus (lindane + captan + diazinon, 25% + 15% + 15% w/w); ADMIRE 240 FS (imidacloprid, 240 g ai/L); FORCE 3G (tefluthrin, 3% w/w); GAUCHO 600FS (imidacloprid 600 g ai/L); R00exp-01 600FS (600 g ai/L); CRUISER 600 FS (thiamethoxam 600 g ai/L). METHODS: Seed was treated in 1 kg lots in individual plastic bags by applying a slurry (all treatments diluted in water to the same volume of 3 ml per kg) of the material via a syringe to each bag. The seed was then mixed for 1 minute to ensure thorough seed coverage. In-furrow granular insecticides were applied during planting using a Noble® applicator. In-furrow insecticides were applied by a single nozzle (Teejet 400 2E) mounted between the disk openers of the planter using a CO2 plot sprayer delivering 131.5 L/ha of water. Beans were planted at 2 locations on 5 May, 2000 at London and Woodstock at a seeding rate of 8 seeds per m using a 2 row cone-seeder mounted on a John Deere Max Emerge planter. Plots were single rows 10 m in length and spaced 0.76 m apart arranged in a RCBD with 4 replications. Plant stand (total emergence of plot) and vigor ratings using a scale of 1-10 (10 = most advanced plant and 1= 10 % development of the most advanced plant) were taken on 8 June and 22 June, 2000 at Woodstock and on 22 June, 2000 at London. RESULTS: See Tables 1and 2. CONCLUSIONS: There were no significant differences between treatments at the Woodstock site. CRUISER, AGROX DL Plus and R00exp-01 seed treatments provided equivalent protection against European chafers. COUNTER applied in-furrow also provided equivalent protection to AGROX DL Plus. FORCE, ADMIRE and GAUCHO did not control European chafers. None of the treatments provided complete protection.
Table 1: Control of European chafer at Woodstock, Ontario. 2000 Treatment
Rate g ai/kg seed or g ai/100 m row
Method of % Application Emerg * 8-6-00
Vigor 1-10 8-6-00
Stand % plant 22-6-00
Vigor 1-10 22-6-00
MAXIM XL (MX)
0.035 g ai/kg (0.025 fludioxonil + 0.01mefenoxam)
ST
75
4.3
72
4.0
MX +GAUCHO
0.035 g ai/kg 1.0 g ai/kg
ST
84
6.8
66
6.5
MX +CRUISER
0.035 g ai/kg 0.52 g ai/kg
ST
86
5.3
85
5.8
MX +AGROX DL Plus
0.035 g ai/kg 1.1 g ai/kg
ST
79
6.8
77
4.0
MX +FORCE
0.035 g ai/kg 1.12 g ai/100 m row
ST IF
78
5.5
78
4.0
MX +COUNTER
0.035 g ai/kg 11.25 g ai/100 m row
ST IF
76
6.5
69
3.3
MX +ADMIRE
0.035 g ai/kg 120 g ai/ha (0.91 g ai/100 m row)
ST IF
89
5.8
77
6.0
MX +ADMIRE
0.035 g ai/kg 60 g ai/ha (0.46 g ai/100 m row)
ST IF
84
6.3
88
7.0
MX +ADMIRE
0.035 g ai/kg 30 g ai/ha (0.23 g ai/100 m row)
ST IF
85
6.5
86
6.8
MX +R00exp-01
0.035 g ai/kg 2.04 ml ai/kg
ST
88
7.5
86
8.0
NS
NS
NS
NS
10.1
25.1
16.2
56.4
LSD (P=.05) CV *ST=Seed Treatment, IF=In-Furrow
Table 2: Control of European chafer at London, Ontario. 2000 Treatment
Rate g ai/kg seed or g ai/100 m row
MAXIM XL (MX)
0.035 g ai/kg ST (0.025 fludioxonil + 0.01 mefenoxam)
40 c *
3.3 c
MX +GAUCHO
0.035 g ai/kg 1.0 g ai/kg
ST
53 b
5.0 abc
MX +CRUISER
0.035 g ai/kg 0.52 g ai/kg
ST
74 a
7.0 ab
MX +AGROX DL Plus
0.035 g ai/kg 1.1 g ai/kg
ST
71 a
7.5 a
MX +FORCE
0.035 g ai/kg 1.12 g ai/100 m row
ST IF
49 bc
3.8 bc
MX +COUNTER
0.035 g ai/kg 11.25 g ai/100 m row
ST IF
76 a
8.5 a
MX +ADMIRE
0.035 g ai/kg 120 g ai/ha (0.91 g ai/100 m row)
ST IF
52 bc
3.3 c
MX +ADMIRE
0.035 g ai/kg 60 g ai/ha (0.46 g ai/100 m row)
ST IF
45 bc
3.5 bc
MX +ADMIRE
0.035 g ai/kg 30 g ai/ha (0.23 g ai/100 m row)
ST IF
52 bc
5.5 abc
MX +R00exp-01
0.035 g ai/kg 2.04 ml ai/kg
ST
80 a
6.8 abc
11.9
3.7
LSD (P=.05)
Method of Stand Application % plant ** 22-6-00
Vigor 1-10 22-6-00
CV 13.9 47.1 * Means followed by the same letter do not significantly differ (P=.05, LSD) ** ST=Seed Treatment, IF=In-Furrow
