PMR REPORT # SECTION E: CEREAL, FORAGE CROPS, and ...

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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 NobleĀ® 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