PMR REPORT #. SECTION E: CEREAL, FORAGE CROPS, and OILSEEDS.
ICAR: 61006537. CROP: Beans (Phaseolus vulgaris L.), Variety SW3308. PEST:.
PMR REPORT #
CROP: PEST:
SECTION E: CEREAL, FORAGE CROPS, and OILSEEDS ICAR: 61006537
Beans (Phaseolus vulgaris L.), Variety SW3308 Bean leaf beetle , Cerotoma trifurcata (Förster)
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:
BEAN LEAF BEETLE CONTROL WITH SEED TREATMENTS IN BEANS
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 600 FS ( 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 min to ensure thorough seed coverage. In-furrow granular insecticides were applied at 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 on May 5, 2000 in Woodstock at a seeding rate of 40 seeds per m using a two-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. Bean leaf beetle damage was assessed on 13 June, 2000 when plants were at the first trifoliate stage. Assessment was a product of incidence (% of plants showing damage) X severity (average % leaf area damaged of those leaves showing damage). Both were estimated visually with the aid of CDA Publication 1458 (1971) assessment key 24. RESULTS: The results are presented in Table 1. CONCLUSIONS: Bean leaf beetle damage was reduced significantly by CRUISER, AGROX DL Plus, and R00exp-01 seed treatments, by COUNTER applied in-furrow and by ADMIRE applied at the highest rate in-furrow.
Table 1: Assessment of bean leaf beetle damage at Woodstock, Ontario. 2000 Treatment
Rate g ai/kg seed or g ai/100 m row
Method of Application **
Bean leaf beetle % Damage Index 13-6-00 1st Trifoliate
MAXIM XL (MX)
0.035 g ai/kg ST (0.025 g fludioxinil + 0.01 g mefenoxam)
2.1 a *
MX + GAUCHO
0.035 g ai/kg 1.0 g ai/kg
ST
1.1 abc
MX + CRUISER
0.035 g ai/kg 0.52 g ai/kg
ST
0.4 bc
MX + AGROX DL Plus
0.035 g ai/kg 1.1 g ai/kg
ST
0.6 bc
MX + FORCE
0.035 g ai/kg 1.12 g ai/100 m row
ST IF
1.4 ab
MX + COUNTER
0.035 g ai/kg 11.25 g ai/100 m row
ST IF
0.2 c
MX + ADMIRE
0.035 g ai/kg 120 g ai/ha (0.91 g ai/100 m row)
ST IF
0.3 c
MX + ADMIRE
0.035 g ai/kg 60 g ai/ha (0.46 g ai/100 m row)
ST IF
1.1 abc
MX + ADMIRE
0.035 g ai/kg 30 g ai/ha (0.23 g ai/100 m row)
ST IF
1.0 bc
MX + R00exp-01
0.035 g ai/kg 2.04 g ai/kg
ST
0.4 bc
LSD (P=.05)
1.1
CV
86.0
* Means followed by the same letter do not significantly differ (P= .05, LSD) **ST = Seed Treatment, IF = In-Furrow
