Download presentation
Presentation is loading. Please wait.
Published byKelly Fowler Modified over 9 years ago
1
Insecticides
2
PESTICIDE CHARACTERISTICS Age Best used when mixed, don’t store after mixing
3
PESTICIDE CHARACTERISTICS Thatch Excessive thatch (>1/2”) binds insecticide
4
PESTICIDE CHARACTERISTICS UV degradation Breaks chemical bonds Biologicals most susceptible
5
PESTICIDE CHARACTERISTICS pH impact Neutral pH is best
6
PESTICIDE CHARACTERISTICS Microbial degradation Bacteria and fungi feed on organic portion of pesticide Can break down within hours
7
GENERAL CLASSIFICATION Stomach poisons Enter insect through the gut when eaten
8
GENERAL CLASSIFICATION Systemic poisons Translocated within plants Insects exposed when feeding Most effective on piercing-sucking insects Receive greater dose
9
GENERAL CLASSIFICATION Contact poisons Enter body when insect walks over treated surface
10
GENERAL CLASSIFICATION Insect Growth Regulator (IGR) Interferes with normal growth Prevents molting (juvenile hormones) Very safe, delayed effect
11
GENERAL CLASSIFICATION Biorational (Biological) Beneficial fungi, nematodes or bacteria
12
MODE OF ACTION Nerve poisons: most conventional insecticides a) Narcotics Physical action in nervous system
13
MODE OF ACTION Nerve poisons b) Synaptic Interrupt synaptic transmission of nervous system Synapse (gap) is the junction between a neuron and another cell (muscle, gland, etc)
14
MODE OF ACTION Nerve poisons b) Synaptic In central nervous system, acetylcholine transmits an impulse across synapse to next cell Chemicals tie up acetylcholine and cause malfunction
15
MODE OF ACTION Muscle poisons Disrupting muscle membrane
16
MODE OF ACTION Physical toxicants Horticultural Oil Clog the spiracles that breathe
17
MODE OF ACTION Physical toxicants Insecticidal soap Strips cuticle and dehydrates insect
18
MODE OF ACTION Physical toxicants Diatomaceous earth Crushed fossils Cut insects walking over it Dehydrate
19
SOURCE CLASSIFICATION Inorganic: lack carbon Organic: possess carbon Natural are produced from natural substances: botanicals and oils Synthetics are manmade
20
MAJOR CLASSES OF ACTIVE INGREDIENTS Pesticide rotation Rotate chemical classes Change mode of action (MOA) http://www.irac-online.org/
21
MAJOR CLASSES OF ACTIVE INGREDIENTS ORGANOPHOSPHATES (OP) Unstable in light Was most widely used insecticides
22
MAJOR CLASSES OF ACTIVE INGREDIENTS ORGANOPHOSPHATES (OP) Malathion, Diazinon and Chlorpyrifos (Dursban) Cancelled
23
MAJOR CLASSES OF ACTIVE INGREDIENTS CARBAMATES Low persistence in environment Noted toxicity to pollinators
24
MAJOR CLASSES OF ACTIVE INGREDIENTS CARBAMATES Carbaryl Greatest use is fruit production Controls insects and fruit-thinning agent
25
MAJOR CLASSES OF ACTIVE INGREDIENTS CARBAMATES Carbofuran (cancelled) Ineffective when used continuously Microorganisms quickly degrade
26
MAJOR CLASSES OF ACTIVE INGREDIENTS CHLORINATED HYDROCARBONS Most persistent insecticide class
27
MAJOR CLASSES OF ACTIVE INGREDIENTS CHLORINATED HYDROCARBONS DDT Cancelled in US in 1973 Extremely stable Resistant to MO, heat, and UV light Fat solubility Other classes broken down in animals by enzymes
28
MAJOR CLASSES OF ACTIVE INGREDIENTS CHLORINATED HYDROCARBONS DDT: 2 characteristics for cancellation 1. Stability allows more to be taken up by animals 2. Accumulates in body fat Found traces in milk fat and in human body fat
29
MAJOR CLASSES OF ACTIVE INGREDIENTS CHLORINATED HYDROCARBONS DDT Biomagnification As predators consume organisms, DDT accumulates in fat of predator Thin egg shells, reproductive failure…
30
MAJOR CLASSES OF ACTIVE INGREDIENTS BOTANICALS Derived directly from plants Organic gardening Considered safer, some exceptions Most are expensive and impractical on commercial scale
31
MAJOR CLASSES OF ACTIVE INGREDIENTS BOTANICALS Pyrethrum Extracted from Chrysanthemum Wide spectrum and rapid knockdown Breaks down rapidly in sunlight
32
MAJOR CLASSES OF ACTIVE INGREDIENTS BOTANICALS Rotenone Second most used botanical Extremely toxic to fish
33
MAJOR CLASSES OF ACTIVE INGREDIENTS BOTANICALS Rotenone New research released in the United States on Monday shows a link between the use of two pesticides, rotenone and paraquat, and Parkinson's disease. People who used either pesticide developed Parkinson's disease approximately 2.5 times more often than non-users.
34
MAJOR CLASSES OF ACTIVE INGREDIENTS BOTANICALS Neem Oil from neem tree Primarily repellent Also medicinal and toothpaste http://www.azasol.com/
35
MAJOR CLASSES OF ACTIVE INGREDIENTS PYRETHROIDS (SYNTHETIC) Replacing many older insecticides: effective and safe Synthetic pyrethrum
36
MAJOR CLASSES OF ACTIVE INGREDIENTS PYRETHROIDS (SYNTHETIC) Permethrin High toxicity at low rates Quick knockdown More stable Permethrin, Cyfluthrin, Deltamethrin
37
MAJOR CLASSES OF ACTIVE INGREDIENTS PHENYL PYRAZOLES Low mammalian toxicity Very effective Fipronil, season long control of ants
38
MAJOR CLASSES OF ACTIVE INGREDIENTS CHLORONICOTINYLS Translocates within plant Merit is absorbed through roots Suspected in CCD (bees) Banned in Canada
39
Colony Collapse Disorder (CCD) Adult bees fly off to die Causes include parasites, viruses, bacteria, poor nutrition and pesticides No proof of cell tower
40
MAJOR CLASSES OF ACTIVE INGREDIENTS BIORATIONAL (Biological) Not substitute for conventional insecticides More scouting and repeat applications
41
MAJOR CLASSES OF ACTIVE INGREDIENTS BIORATIONAL (Biological) Bt (Bacillus thurigiensis) Protein produced by Bt that damages gut Death in couple days
42
MAJOR CLASSES OF ACTIVE INGREDIENTS BIORATIONAL (Biological) Bt (Bacillus thurigiensis) Varieties have specific host Var. kurstaki kills caterpillars (Dipel) Genetically modified corn contains protein Monarch butterflies?
43
MAJOR CLASSES OF ACTIVE INGREDIENTS BIORATIONAL (Biological) Bt (Bacillus thurigiensis) Var. israliensis kills mosquitoes
44
MAJOR CLASSES OF ACTIVE INGREDIENTS BIORATIONAL (Biological) Spinosad Derived from bacterium Effective flea control
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.