AUD 2b Lect #5 (pond math & management)

How many ounces are in 1 gallon

128

Convert 320 oz to gallons

128 oz / 320 oz = 1 gal / x

128x = 320

x = 2.5 gal

How to find the surface area of a rectangular pond

A = B x h

How to find the surface area of a circular pond

A = pi (r)²

How to find the surface area of a triangular pond

A = (B x h) / 2

How many ft² are in 1 surface acre

43,560 ft²

How do you convert ft² to surface acres

SA = ft² / 43,560

How do you find acre feet

AF = surface acres x average depth

For a circular pond with a diameter of 250 ft and an average depth of 4.8 ft, find the acre feet

(3.14)(125)² = 49,063 ft²

49,063 / 43,560 = 1.13 surface acres

1.13 × 4.8 = 5.42 acre feet

For a rectangular pond with a length of 250 ft, a heigh of 150 ft, and a maximum depth of 12 feet, find the acre feet

150 × 250 = 37,500 ft²

37,500 / 43,560 = 0.86 surface acres

12 / 2 = 6 ft average depth

0.86 × 6 = 5.16 acre feet

For a triangular pond with a base of 250 ft, a height of 150 ft, and an average depth of 5.2 ft, find the acre feet

(250 × 150) / 2 = 18,750 ft²

18,750 / 43,560 = 0.43 surface acres

0.43 × 5.2 = 2.24 acre feet

How many gallons are in 1 acre foot

326,000 gal

For a rectangular pond with a surface area of 0.86 and an average depth of 6 ft, how many gallons is it?

0.86 × 6 = 5.16 surface acre

5.16 × 326,000 = 1,682,160 gal

How many gallons of Aquathol K (1.25 gal / acre ft) is needed to treat a 1.4 acre pond with an average depth of 4 feet?

1.4 × 4 = 5.6 acre feet

5.6 × 1.25 = 7 gal

What are some things you should be looking for when approaching a pond

• what is growing in the water?

• what is the color of the water?

• are there any organisms dying in/around it?

• what is going on in the watershed?

• what does the customer want/expect?

What is the 15-25% rule

we should try to keep 15-25% native vegetation growing in the body of water for sustainability

What are systemic herbicides and some examples

• ex: Glyphosate, Fluridone, 2,4-D, Triclopyr, Imazapyr

• are absorbed into the plant

• disrupt biochemical pathways

What are contact herbicides and some examples

• ex: Diquat, Endothall, Flumioxazin, Copper, Peroxides

• damage plant based on contact

What is the trade and compound name of copper sulfate

• trade: Copper Sulfate Crystals

• compound: Copper Sulfate

What is the trade and compound name of peroxides

• trade: GreenClean, PAK 27

• compound: Sodium Carbonate Peroxyhydrate

What is the trade and compound name of chelated copper

• trade: Captain XTR, Cutrine Plus/Ultra, Argos

• compound: Copper Ethanolamine Complex

What is the trade and compound name of Diquat

• trade: Tribune, Reward

• compound: Diquat Dibromide

What is the trade and compound name of Endothall

• trade: Aquathol K/Super K

• compound: Dipotassium Salt of Endothall

What is the trade and compound name of 2,4-D

• trade: Navigate, Depth Charge

• compound: 2,4-Dichlorophenoxyacetic Acid

What is the trade and compound name of Flumioxazin

• trade: Clipper, Flumigard

• compound: n/a (too long, not included on slides)

What is the trade and compound name of Fluridone

• trade: Sonar

• compound: 1-methyl-3-phenyl-5-[3-(trifluoromethyl) phenyl]-4(1H)-pyridinone

What is the trade and compound name of Glyphosate

• trade: AquaNeat, Cinco

• compound: N-(phosphonomethyl)-glycine

What is the trade and compound name of Imazapyr

• trade: Habitat

• compound: n/a (too long, not included on slides)

What is the trade and compound name of Copper Complexes

• trade: Komeen

• compound: copper ethylenediamine complex

What types of products work best on submergent plants

contact and systemic herbicides

Which product type works best on emergent and floating plants

systemic herbicides

Which product type works best on algae

algaecides

What colors do our pond dyes come in and what is the purpose

• aesthetics only (DO NOT say anything about algae)

• blue, black, twilight

What does a spray adjuvant do

enhances chemical treatments by assisting with wetting agents, product spreaders, stickers, and markers

When should you use and not use pond dyes

• use: restrict submersed growth (don’t tell customers tho lol)

• don’t use: if pond is flowing out (heavy wind/rain)

When should you use and not use spray adjuvants

• use: in a backpack mix to improve pesticides

• don’t use: by itself, or not mixed

What makes a pesticide application successful?

• using appropriate/legal rates

• allowing long enough contact time (ex: don’t do a shoreline spray in the rain)

Describe the benefits of a pitch/hand application

• controlled with small/limited space

• highest concentration in spot where it was put

• great for spot treatments

Describe the benefits of a backpack spray application

• controlled with small/limited space

• highest concentration in spot where it was put

• great when nuisance species is around the shoreline

Describe the benefits of a shoreline pump application

• easy spread over maximum distance

• great for when you can’t reach with backpack/pitching

Describe the benefits of a boat application

• easy spread over the full extent of a body of water

• greatest target control

• great for planktonic blooms, 100% coverage, or if shoreline is inaccessible

What are some things you should consider that would impact treatments

• wind direction

• inflow and outflow locations

• extent of nuisance infestation vs size of the pond

• presence of non nuisance targets

When should you not be applying pesticides to the water

• heavy flow (be careful after rain)

• if there is a risk to aquatic organisms (super low oxygen, fish spawning)

• water restrictions (irrigation, drinking)

What do you do if the pond looks like absolute garbage

• quit / go home (haha jk jk… unless…)

• treat at 33% for 3 visits (limit oxygen loss)

• treat 1 nuisance target at a time

• tell the customer your plan so they don’t call the office and complain