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PLANT PROTECTION 1 – Pests, Diseases and Weeds

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<strong>PLANT</strong> <strong>PROTECTION</strong> 1 – <strong>Pests</strong>, <strong>Diseases</strong> <strong>and</strong> <strong>Weeds</strong><br />

Table 72. Herbicide Mode of Action Groups (2009) some examples (contd)<br />

CHEMICAL FAMILY<br />

MODE OF<br />

ACTION GROUP<br />

G<br />

Inhibitors of protoporphyrinogen<br />

oxidase (PPOs)<br />

N-phenylphthalimides<br />

H<br />

Bleachers:<br />

Inhibitors of 4-<br />

hydroxyphenolpyruvate<br />

dioxygenase<br />

(HPPDs)<br />

I<br />

Disruption of plant<br />

cell growth (distorts<br />

new growth)<br />

More than 90<br />

registered<br />

herbicides contain<br />

dicamba<br />

SUBGROUP<br />

Diphenyl<br />

ethers<br />

Oxadiazoles<br />

Triazoli<br />

nones<br />

Pyrimidindio<br />

nes<br />

Phenylpyraz<br />

ole<br />

Pyrazoles<br />

Isoxazoles<br />

Phenoxys<br />

(hormone<br />

herbicides)<br />

Spray drift can<br />

cause severe<br />

damage to<br />

cotton, grapes,<br />

tomatoes, oil<br />

seed crops,<br />

ornamentals<br />

(page 460)<br />

Benzoic<br />

acids<br />

(similar mode<br />

of action to the<br />

phenoxys)<br />

Pyridine<br />

carboxylic<br />

acids<br />

(pyridines)<br />

Quinoline<br />

carboxylic<br />

acids<br />

THE PRODUCT<br />

Trade name<br />

Active constituent<br />

OXYFLUORFEN, GOAL<br />

oxyfluorfen<br />

may be formulated with<br />

oryzalin (Rout)<br />

PLEDGE, VALOR<br />

flumioxazin when mixed<br />

with certain glyphosate or<br />

paraquat/diqat herbicides<br />

OXADIARGYL<br />

oxadiargyl<br />

RONSTAR<br />

oxadiazon<br />

may be formulated with<br />

fertilizer<br />

AFFINITY, VARIOUS<br />

carfentrazone-ethyl<br />

LOGRAN B-POWER<br />

butafenacil<br />

ECOPAR<br />

pyraflufen-ethyl<br />

may be formulated with<br />

other herbicides<br />

TAIPAN<br />

benzofenap<br />

BALANCE<br />

isoxaflutole<br />

MCPA, VARIOUS<br />

MCPA<br />

often formulated with other<br />

herbicides, eg dicamba<br />

198 products containing<br />

MCPA, also fertilizers<br />

2,4-D, VARIOUS<br />

2,4-D<br />

181 products may be mixed<br />

with other herbicides<br />

DICAMBA, VARIOUS<br />

dicamba<br />

often formulated with MCPA<br />

to improve activity against<br />

broad-leaved weeds<br />

BLACK BERRY & TREE<br />

KILLER, VARIOUS<br />

triclopyr<br />

often formulated with<br />

picloram, also other<br />

herbicides<br />

TORDON, VIGILANT<br />

HERBICIDE GEL<br />

picloram<br />

often formulated with<br />

triclopyr, MCPA<br />

CLOPYRALID,<br />

CLOMAC FORESTRY,<br />

VARIOUS<br />

clopyralid<br />

may be formulated with<br />

2,4-D, dicamba<br />

DRIVE<br />

quinclorac<br />

Mode of action<br />

Pre-emergence<br />

Post-emergence<br />

Non-systemic<br />

(contact)<br />

Post-emergence<br />

Rapid knockdown<br />

SOME USES<br />

Read label, obtain advice from company<br />

CROPS, SITES<br />

TREATED<br />

Tree fruit, nuts &<br />

vines, vegetables,<br />

forestry trees,<br />

cotton, coffee.<br />

prior to sowing<br />

some crops<br />

Prior to sowing<br />

certain crops<br />

WEEDS CONTROLLED,<br />

SUPPRESSED<br />

Selective<br />

broadleaves & some<br />

grasses<br />

Non-selective<br />

various grass &<br />

broadleaved weeds<br />

Pre-emergence Couch turfgrass Selective<br />

summer & winter grass<br />

Pre-emergence<br />

Post-emergence<br />

Contact action<br />

Pre-plant<br />

Pre-emergence<br />

Knockdown<br />

Contact action<br />

Residual control<br />

Post-emergence<br />

Contact action<br />

also defoliation & boll<br />

opening in cotton<br />

Pre-emergence<br />

Early postemergence<br />

Pre-emergence<br />

Early postemergence<br />

Post-emergence<br />

Systemic. Some<br />

formulations can be<br />

very volatile <strong>and</strong><br />

damage non-target<br />

species<br />

Post-emergence<br />

Systemics<br />

Post-emergence<br />

Pre-emergence<br />

Systemic remains<br />

in soil 2-3 months<br />

Post-emergence<br />

Systemic<br />

Foliage, stem & root<br />

absorbed,<br />

Post-emergence<br />

Systemic, foliar <strong>and</strong><br />

root absorption soil<br />

residual<br />

Post-emergence<br />

absorbed by<br />

leaves & roots<br />

Post-emergence<br />

Systemic<br />

Woody<br />

ornamental<br />

shrubs, trees in<br />

nurseries; turf<br />

Winter cereals,<br />

pyrethrum;<br />

rice<br />

Wheat<br />

Winter cereals;<br />

Rice<br />

Sugarcane,<br />

chickpeas<br />

Non crop,<br />

commercial &<br />

industrial areas,<br />

turf, pasture,<br />

cereal crops,<br />

linseed rice, peas,<br />

spot spraying<br />

Non-crop, fallow,<br />

turf, cereal<br />

crops, pastures,<br />

sugarcane, spot<br />

spraying<br />

Non-crop, turf,<br />

pasture, cereal<br />

crops, maize, rice,<br />

Pinus radiata,<br />

conservation<br />

tillage<br />

Non-crop,<br />

industrial, fallow,<br />

fencelines, fire<br />

breaks, industrial,<br />

forests, pasture<br />

Non-crop, rights<br />

of way, grazing<br />

pastures, forestry<br />

Certain field crops,<br />

pastures, fallow<br />

l<strong>and</strong>, forests,<br />

industrial sites<br />

Certain established<br />

turf species<br />

Selective<br />

broadleaved weeds<br />

mainly, but some<br />

grasses<br />

Selective<br />

certain annual<br />

broadleaved weeds;<br />

aquatic weeds (in rice)<br />

Non-selective<br />

Certain broadleaf weeds<br />

& grasses<br />

Selective<br />

annual broadleaved<br />

weeds<br />

Selective<br />

certain broadleaved<br />

weeds<br />

Selective<br />

control & suppression of<br />

certain broadleaf weeds &<br />

grasses<br />

Selective<br />

certain broadleaved<br />

weeds<br />

Selective<br />

certain broadleaved<br />

weeds<br />

Selective<br />

certain broadleaved<br />

weeds<br />

Selective<br />

certain woody &<br />

broadleaved weeds<br />

Selective<br />

certain woody weeds<br />

<strong>and</strong> some other species<br />

Selective<br />

certain broadleaved<br />

weeds<br />

Selective<br />

summer grass, white<br />

clover, suppresses kikuyu<br />

452 <strong>Weeds</strong> - Integrated Weed Management

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