Agenda 1. Introduction 2. What we have done 3. What we know and - - PowerPoint PPT Presentation

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Agenda 1. Introduction 2. What we have done 3. What we know and - - PowerPoint PPT Presentation

Jun 17, 2023 397 likes •728 views

Agenda 1. Introduction 2. What we have done 3. What we know and have observed 4. What we do not know 5. Control measures 5. Control measures 6. Source of the problem 7. Penn State 8. Going forward 9. Discussion What We Have Done 1.

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SLIDE 1
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SLIDE 2

Agenda

  • 1. Introduction
  • 2. What we have done
  • 3. What we know and have observed
  • 4. What we do not know
  • 5. Control measures
  • 5. Control measures
  • 6. Source of the problem
  • 7. Penn State
  • 8. Going forward
  • 9. Discussion
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SLIDE 3

What We Have Done

  • 1. Collect home owner counts to profile the problem over time
  • 2. Over 200 soil samples to determine if the source of the problem

is internal to Harrogate

  • 3. Monthly air sampling at 20 – 30 sites
  • 4. Continuous air sampling at three sites
  • 4. Continuous air sampling at three sites
  • 5. Ran a major test spraying the exterior of homes
  • 6. Repellent tests
  • 7. Homeowner interviews
  • 8. Linked the problem to the mushroom farms
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SLIDE 4

In Home Counts Are Increasing

200 250 300

for Month

Monthly Average Phorid Counts For Multiple Homes

50 100 150

Daily Average for M

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SLIDE 5

In Home Counts Vary A Lot

400 500 600

Average Daily Phorid Fly Count at Multiple Homes

100 200 300

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SLIDE 6

210

B4 B5 B6 B8 B14 B18 B19 B21 M6 M7 G2 M5 G3 G4 G5 G6 G8 G7 B20

Soil Sampling

G9 M17 M18 M19 M1 B1 B2 B3 B4 B9 B10 B11 B12 B13 B15 B16 B17 M3 M4 M7 M8 M9 G1

B = Basin/Bio-Basin M = Mulched area G = Grassy areas

M2

49 Sites Sampled multiple times Incubated 4 weeks

M10 M11 M13 M14 M15 M16

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SLIDE 7

Soil Sampling Results

Zero Zilch Zip Nada Nuthin Zip Nada The phorid flies in our homes Are NOT coming from breeding Within our community

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SLIDE 8

39x28 122x9 172x10 43x4 75x6 27x29 83x23 119x12 194x13 17x21 853x24 197x25 156x7

October

Air Sampling Results (Total six day count)

October Site code Count

Total Counts July = 45 August = 342 September = 606 October = 2426

38x3 10x19 28x20 7x26 181x14 62x15 3x16

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SLIDE 9

Three Continuous Air Sample Sites

Behind 401 Hollins X At the corner of Limestone & Southwood X X X Between 202 & 142 Crescent Southwood

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SLIDE 10

100 200 300 400 500

Phorid Fly Count - MPF/Day

Outdoor Phorid Count at 202 & 142 Crescent

Results of Continuous Air Sampling

100 200 300 400 500

Phorid Fly Count - MPF/Day

Outdoor Phorid Count Behind 401 Hollins

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SLIDE 11

250 300 350 400 450 500

  • unt - MPF/Day

Outdoor Phorid Count at Southwood & Limestone

Results of Continuous Air Sampling

50 100 150 200 250

Phorid Fly Coun

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SLIDE 12

Spray Test

  • 1. Objective = determine if an insecticide can kill
  • r block the phorid flies as they enter our

homes

  • 2. Large scale test of about 25 homes
  • 3. 13 treated; the rest untreated
  • 4. Wanted to see a big drop in the treated homes
  • 5. Started with an 18 day “base line” period 29-

Sept

  • 6. Sprayed 13 homes on 17-Oct
  • 7. Completed the test 13 days later on 31-Oct
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SLIDE 13

Spray Test

120.0 140.0 160.0 180.0

Spray Test - Daily Average Counts without 117 Tower & 313 Hyde

Spray Date 313 Hyde and 117 were control homes with average counts much higher than most other homes

0.0 20.0 40.0 60.0 80.0 100.0 120.0 Treated Control

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SLIDE 14

Spray Test Comparisons

(Numbers = Daily Counts) Control Homes Home Before After 1xx Hyde 40 65 2xx Hyde 66 63 1xx Cornwall 69 50 1xx Tower 170 191 2xx Crescent 72 56 2xx Crescent 1 3 Treated Homes Home Before After 1xx Hyde 15 16 3xx Hyde 10 11 3xx Hyde 18 34 1xx Cornwall 15 23 Little or No Change 2xx Hyde 75 116 2xx Hyde 83 130 3xx Hyde 11 59 3xx Hyde 406 1353 2xx Hyde 63 193 2xx Hyde 64 241 2xx Hollins 108 191 2xx Crescent 394 230 1xx Crescent 35 9 Counts Increase Counts Drop

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SLIDE 15

Spray Test

  • 1. Results:

A. Some sprayed homes went up, some stayed the same B. Two sprayed homes saw some improvement C. Some “control” homes went up, some stayed the same

  • 2. Conclusion - Bifenthrin does not provide good

control, but it may help high count homes

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SLIDE 16

What We Know

  • 1. Counts increase with time – both indoors and outside
  • 2. Indoor counts vary widely home to home
  • 3. Spikes happen –indoors and outside follow in lockstep
  • 4. Soil sampling – ZERO phorid flies
  • 5. Higher outdoor counts closer to the mushroom farms
  • 5. Higher outdoor counts closer to the mushroom farms
  • 6. Low counts at Southwood and Limestone
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SLIDE 17

Team Observations

  • 1. Wide variation in individual perceptions
  • 2. Open doors and windows = high counts
  • 3. Vacations generally mean low counts
  • 4. They probably infiltrate our homes more than realized
  • 5. Homeowner interviews showed no obvious differences between
  • 5. Homeowner interviews showed no obvious differences between

high and low count homes.

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SLIDE 18

What We Do Not Know

  • 1. Why phorid flies enter our homes
  • 2. How they enter our homes
  • 3. Why individual homes are so different
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SLIDE 19

Current Knowledge About Control

  • 1. Fly lights are the best available technology
  • 2. Exterior treatment with bifenthrin may reduce counts, but does

not control phorid flies

  • 3. Ditto Cedarcide PCO
  • 4. Repellants have shown some reduction in counts, but do not
  • 4. Repellants have shown some reduction in counts, but do not

provide good control of the problem

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SLIDE 20

The Source of the Phorid Flies

It is the mushroom farms

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400 500 600 700 800

Average Daily Phorid Fly Count at Multiple Homes October 2017

100 200 300 400 1-Oct 2-Oct 3-Oct 4-Oct 5-Oct 6-Oct 7-Oct 8-Oct 9-Oct 10-Oct 11-Oct 12-Oct 13-Oct 14-Oct 15-Oct 16-Oct 17-Oct 18-Oct 19-Oct 20-Oct 21-Oct 22-Oct 23-Oct 24-Oct 25-Oct 26-Oct 27-Oct 28-Oct 29-Oct 30-Oct 31-Oct 1-Nov 2-Nov

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SLIDE 22

1000 1200 1400 1600 1800

Count - MPF/Day

Outdoor Phorid Counts Between 202 & 142 Crescent

Mushroom Farm Doors Open

Wind Blowing Flies Wind Blowing Flies Directly At Harrogate Wind Blowing Flies Away From Harrogate

200 400 600 800

Phorid Fly Coun

Wind Blowing Flies Away From Harrogate

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SLIDE 23

East Wind 13-Oct

Growing Room Door Open 13-Oct

Phorid Fly “Attack” October 13 - 15, 2017

Indoor Count 251 on 11-Oct 2,038 on 13-Oct Indoor Count 458 On 11-Oct >1,200 on 15-Oct Indoor Count 172 on 11-Oct 1,064 on 14-Oct Outdoor Sample 518 on 10/12 1650 on 10/13 Indoor Count 376 On 11-Oct 1600 on 14-Oct Outdoor Sample 53 on 10/10 386 on 10/13 Indoor Count 53 on 11-Oct 350 on 13-Oct

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SLIDE 24

North Room Open & Being Filled 23-Oct

Phorid Fly “Attack” October 23, 2017

Indoor Count 899 on 22-Oct 3,753 on 23-Oct Indoor Count 228 on 22-Oct 631 on 23-Oct Indoor Count 254 On 21-Oct 486 on 23-Oct “Worst it has been this year” Indoor Count 59 on 22-Oct 261 on 23-Oct Indoor Count 11 on 22-Oct 46 on 23-Oct

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SLIDE 25

Mushroom Farm Activities During Phorid Fly “Attack” October 23, 2017

10:15 am Door Open 1:00 pm One side loaded second side ready 1:05 pm Second side started loading Next Day at 10:45 am operation complete

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SLIDE 26

Doors Open

Phorid Fly “Attack” November 1, 2017

Indoor Count 539 on 31-Oct 4,448 on 1-Nov Indoor Count 43 on 31-Oct 963 on 1-Nov Indoor Count 10 on 31-Oct 71 on 1-Nov Doors Open 963 on 1-Nov Indoor Count 5 on 31-Oct 72 on 1-Nov Indoor Count 8 on 31-Oct 246 on 1-Nov

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SLIDE 27

250 300 350 400 450

Count - MPF/Day

Outdoor Phorid Counts Behind 401 Hollins

Wind Direction To Or From The Mushroom Farms Accounts For All These Peaks And Valleys 50 100 150 200

23-Jun-17 30-Jun-17 07-Jul-17 14-Jul-17 21-Jul-17 28-Jul-17 04-Aug-17 11-Aug-17 18-Aug-17 25-Aug-17 01-Sep-17 08-Sep-17 15-Sep-17 22-Sep-17 29-Sep-17 06-Oct-17 13-Oct-17 20-Oct-17 27-Oct-17 03-Nov-17 10-Nov-17 17-Nov-17 24-Nov-17 01-Dec-17 08-Dec-17 15-Dec-17

Phorid Fly Cou

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SLIDE 28

The Source of the Phorid Flies

It is the mushroom farms

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SLIDE 29

Conclusions

  • 1. The fly population builds spring to fall
  • 2. Wide variability in how homes are affected
  • 3. The flies are coming from the mushroom farms
  • 4. Insecticides or repellents may help but do not eliminate the

problem

  • 5. Two logical points of control
  • 5. Two logical points of control
  • A. At the source – a political issue
  • B. Where they are entering our homes – if we knew where
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SLIDE 30

Penn State Phorid Fly Management Research Strategies

  • Use of biological pesticides to kill fly larvae in the

mushroom soil.

  • Use of eaves tubes to stop adult fly movement

between adjacent rooms. between adjacent rooms.

  • Collect adult flies using mushroom house air

circulation system.

  • Attract adult flies using sex pheromones.
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SLIDE 31

Going Forward

  • 1. Spray test follow up – residents of control homes will be

contacted as to their wishes to have their homes sprayed

  • 2. No means have been found at this time of completely

eliminating the problem, just suppressing it.

  • Asking neighbors to share remedies they are using within

their homes their homes

  • 3. No insecticides, repellents or anything else should be applied to

the bio-basins or other common areas in the community.

  • 4. The Board will define a policy regarding what can be sprayed

and where it can be sprayed to manage Phorid Flies.

  • 5. The Board will be scheduling a meeting with NGT

representatives to present the findings of the Vetting Team.