Pest Management BMP March 2022

Preventive Model-based Model-based + resistant varieties

70

60

50

40

40% Threshold

30

20% Threshold

20

Dollar Spot Model Probability

10

0

5/1/20 5/15/20 5/29/20 6/12/20 6/26/20 7/10/20 7/24/20 8/7/20 8/21/20 9/4/20 9/18/20 10/2/20

Figure 1. Dollar Spot control simulation for Ithaca, NY (2020)

Table 1. Simulated Pesticide Applications made to Fairways for Dollar Spot control

Control approach

2017 2018 2019

2020

2021

5-yr Total Total Fungicide Cost***

Ithaca, NY

Preventative

7

7

7

7

7

35

$ 87,500

Model-based*

6

6

5

4

6

27

$ 67,500

Model-based + resistant varieties**

4

5

3

2

3

17

$ 42,500

Millbrook, NY

Preventative

7

8

7

7

7

36

$ 90,000

Model-based*

6

7

6

5

6

30

$ 75,000

Model-based + resistant varieties**

4

4

3

2

2

15

$ 37,500

*Applications made on a 28-day interval when SK model is above 20%, and a 21-day interval when SK model is above 40% **Applications made on a 28-day interval when SK model is above 40% ***Assumes an average $150 per acre fungicide cost and 20 acres of fairway

Pest Management BMP Reducing Risk with Data Driven Fairway Pest Management

4