PCC MarchApril Final Draft

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Continued from Page 31 study (Figure 2). The reduction in moth populations from mating disruption was significant on September 18 (P =0.039) and October 15 (P = 0.006). The mean number of larvae per 25 plants in a replication was zero on all observation dates except for 0.01 on Aug. 30 in the plots that received CheckMate. Four insecticide applications made by the time the study was initiated and the remaining six applications effectively suppressed larval populations. Larval feeding damage ratings were consistently low (P < 0.0001) in the plants that did not receive CheckMate DBM-F (Figure 3). The damage was limited to the older leaves at the bottom of the plants and must have been from early feeding before the initiation of the study. The lack of larvae and the evidence of new feeding damage also confirm that the crop remained healthy and pest-free. Yield and Cost Comparisons Since frequent pesticide applications effectively suppressed larval populations and prevented their feeding damage, the effectiveness of mating disruption on larval populations or their damage could not be determined in this study. Moths found in the traps probably developed from the larvae in the field or could have been those that flew in from other areas. However, lower moth populations in CheckMate DBM-F treatment demonstrated the overall influence of mating disruption and pest suppression. It is common to make about 10 to 12 pesticide sprays during the six-month crop cycle of Brussels sprouts. The cost of each application varied from about $73 to $192 depending on the materials used with an average cost of about $128 per application in this study. The cost of two CheckMate DBM-F applications is $91. If diamondback moth populations could be reduced with mating disruption, it is estimated that two to three pesticide applications could be eliminated. That results in $164 to $292 of saving for the pesticide costs and additional savings in the application Continued on Page 34 Number of moths/traps Damage Rating 300 250 200 150 100 50 0 1.5 1.0 0.5 0.0 8/8/2020 8/20/2020 8/30/2020 P < 0.0001 Diamondback Moth Occurrence Grower Standard 9/1/2020 9/11/2020 Larval Feeding Damage Grower Standard 9/18/2020 10/6/2020 P < 0.0001 Figure 3. Feeding damage by diamondback moth larvae. GS+CheckMate 9/27/2020 Figure 1. Mean number of diamondback moth adults found in the traps. 20.00 0.00 -20.00 -40.00 -60.00 -80.00 -100.00 8/8/2020 GS+CheckMate 10/6/2020 % Control from CheckMate DBM-F 8/20/2020 9/1/2020 9/11/2020 9/18/2020 9/27/2020 10/6/2020 10/18/2020 P = 0.0074 10/15/2020 10/15/2020 Figure 2. Reduction in moth populations by adding pheromone for mating disruption. 32 Progressive Crop Consultant March / April 2021
Trusted to Reduce Crop Damage Ask for CheckMate ® and Puffer ® Suterra offers the best pheromone products using better chemistry, better hardware, and better quality. From nuts to citrus to vegetables, CheckMate ® and Puffer ® are trusted on more acres than any other mating disruption brand. Ready for 2021? Contact your local representative to schedule a virtual or outdoor consultation. www.suterra.com
Page 1 and 2: March / April 2021 A Review of Pyth
Page 3 and 4: 4 8 12 18 24 IN THIS ISSUE A New Ge
Page 5 and 6: Figure 1. Integration of universal
Page 7 and 8: Because protection requires great p
Page 9 and 10: Average Yield (lb/ac, 12% protein)
Page 11 and 12: NDRE and leaf chlorophyll can serve
Page 13 and 14: THE BEST WAY TO MANAGE PATHOGENS BE
Page 15 and 16: Pythium pathogens form thick-walled
Page 17 and 18: NAVEL ORANGEWORM MANAGEMENT discolo
Page 19 and 20: (Left) Spotted-wing drosophila adul
Page 21 and 22: decreased the number of larvae in f
Page 24 and 25: New Findings on Limb Dieback of Fig
Page 26 and 27: Figure 3. Left, pycnidia protruding
Page 28 and 29: Figure 4. Susceptibility of various
Page 30 and 31: Enhancing Diamondback Moth Manageme
Page 34 and 35: Diamondback moth larva and adult (p
Page 36 and 37: Vegetable Growers Express Impressio
Page 38: Continued from Page 37 Responses Re
Page 41 and 42: References Biofertilizers Market Si
Page 43 and 44: Go boldly into every battle. Includ
Page 45 and 46: everything at fall pre-plant with P
Page 47 and 48: Apply less, expect more? There’s

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