Here is the full list of all 100 Pesticide Not Required achievements.
Win a run as Furog
Fill all 48 plots with the same crop
Find every unique Spring fish
Fill out the entire compendium
Reach 75% or higher Crop Growth Speed
Win a run as Sir Hopselot
Survive Spring II
Win a run as Collier
Survive Winter II
Win a run while under 10% health
Win a run as Bean
Survive Autumn II
Reach 50% or higher Enemy Spawns
Win a run as Mignon
Harvest 500 crops in a single run
Reach 75% or higher Crop Yield
Find every unique Summer fish
Win a run as Plotty
Reach max level on Water Beam
Win a run as Dr. Hopps
Reach 75% or higher Resistance
Win a run as Finn
Find every unique Winter fish
Catch 50 fish in a single run
Win a run as Stripe
Reach max level on Haybale
Reach max level on Wood Axe
Win a run as Bubba
Survive Winter I
Reach max level on Bonk Hammer
Reach max level on Weed Wacker
Reach max level on Tadpole Spew
Win a run as Billybob
Survive Autumn I
Find every unique Autumn fish
Reach max level on Toad Oil
Harvest at least 1 of each unique crop in a single run
Reach max level on Pitchfork
Reach max level on Mole Turret
Find each unique ore type
Survive Summer II
Eliminate a boss while WUMBO
Reach max level on Bombs
Reach max level on Katana
Survive Spring I
Get 10 pets in a single run
Reach max level on Lawnmower
Reach max level on Boomerang
Reach max level on Yoyo
Reach 200 or higher Max Health
Reach max level on Bouncy Ball
Collect 20 apples in a single run
Win a run as Joe
Survive Summer I
Plant 50 crops in one day
Occupy all 48 farming plots at once
Reach max level on Twin Scythes
Reach max level on Fairy Dance
Reach max level on Scarecrow
Reach max level on Tongue Lash
Reach max level on Mower Blades
Win a run with under 100 crop harvests
Mine 50 Ore in a single run
Reach 20 water capacity
Finish a run without getting hit
Reach 75% or higher Coin Gain
Reach 100% or higher Projectile Speed
Land a triple critical hit
Reach 75% or higher Move Speed
Win a run as Penelhoppe
Win a run as Squeegee
Win a run as Swifty
Win a run as James Pond
Win a run as Hue Mann
Win a run as Pumpkin
Win a run as Greg From Accounting
Win a run as Sprout
Win a run as Truffle
Survive Summer III
Survive Summer IV
Survive Spring III
Survive Spring IV
Survive Autumn III
Survive Autumn IV
Survive Winter III
Survive Winter IV
Win a run without scaring any ducks
Eliminate 10,000 or more pests in a single run
Win a run with 500,000 or more coins remaining
Win a run without eliminating any pests on Day 1
Win a run with 3 or less weapons
Win a run with 2 or less weapons
Win a run with only 1 weapon
Eliminate a boss within 5 seconds of it spawning
Stand still for 100 seconds
Reach level 70 in a single run
Reach level 90 in a single run
Buy 10 pieces of decor
Buy 5 pet cosmetics
Pet Rosco 100 times during a single run