Weed Management Lab Midterm

Front 1

proper order of tank mixing (5)

Back 1

WP, DF, F, EC, and S

Front 2

S or SP

Back 2

Solution or Soluble Powder
-truly dissolves in water
-concentration 50-80%
-does not readily enter plant tissue
-leaching potential hazard

Front 3

E or EC

Back 3

Emulsifiable Concentrate
-not soluble in water, but requires little agitation
-oily and makes a milky liquid when mixed with water
-penetrates waxy foliage
-may be corrosive
-easily and rapidly absorbed by skin!

Front 4

WP or W

Back 4

Wettable Powder
-not soluble, makes a milky suspension
-easy to handle and measure
-requires continuous agitation
-abrasive and clogs nozzles

Front 5

F or FL

Back 5

Flowable
-not soluble
-similar to ECs in handling
-seldom clog nozzles
-require agitation
-hard to measure

Front 6

DG or DF

Back 6

Dispersible Granules or Dry Flowables
-small beads that dissolve in water
-create less dust than WPs
-may have trouble mixing with liquid fertilizer
-require agitation

Front 7

ME

Back 7

Microencapsulation
-A.i. enclosed in capsule, slow release
-needs constant agitation
-less volatile

Front 8

G

Back 8

Granules
-ready to use
-easy to apply
-may have poor distribution
-needs rainfall to be activated
-do not stick to foliage
-expensive

Front 9

A

Back 9

Aerosols
-very low concentrate solution
-expensive

Front 10

D

Back 10

Dusts

Front 11

toxicity

Back 11

inherent poisonous potency of a compound (LD50)

Front 12

LD50 of <50 more dangerous or less dangerous?

Back 12

MORE!

Front 13

LD50 &lt;50

Back 13

Danger - poison - Highly toxic

Front 14

LD50 40-499

Back 14

Warning - Moderately toxic

Front 15

LD50 500-4999

Back 15

Caution - Slightly toxic

Front 16

LD50 5000-49,999

Back 16

Caution - Relatively non-toxic

Front 17

Acute poisoning

Back 17

single exposure to a chemical

Front 18

Chronic poisoning

Back 18

multiple exposure to small (sub-lethal) amounts

Front 19

main routes of entry for chemicals

Back 19

1) Dermal exposure
2) Oral ingestion
3) Respiratory exposure

Front 20

personal protective equipment

Back 20

gloves (liquid-proof), goggles or face shield, boots, respirator, hat, waterproof apron

Front 21

REI

Back 21

Restricted Entry Interval - time between the herbicide application and the moment it is safe to enter the treated area

Front 22

Chenopodiaceae

Back 22

Goosefoot family
-goosefoot-shaped leaves
-grooved stems

Front 23

Oxalidaceae

Back 23

Woodsorrel family
-leaves trifoliate, heart-shaped
-5-petaled flowers
-5-chambered fruit

Front 24

Juncaceae

Back 24

Rush family
-leaves 3-ranked
-stems usually round
-flowers chaffy

Front 25

Solanaceae

Back 25

Nightshade family
-leaves alternate
-fruit is berry or capsule

Front 26

Lythraceae

Back 26

Loosestrife family
-stems square
-leaves opposite or whorled

Front 27

Equisetaceae

Back 27

Horsetail family
-stems jointed or grooved

Front 28

Polygonaceae

Back 28

Buckwheat family
-ocrea (transparent sheath at stem base)

Front 29

Fabaceae

Back 29

Pea family
-flowers papilionaceous
-fruit is legume pod

Front 30

Plantaginaceae

Back 30

Plantain family
-leaves basal and ribbed
-flowers borne on leafless stalks

Front 31

Euphorbiaceae

Back 31

Spurge family
-stems exude milky latex

Front 32

Portulacaceae

Back 32

Purslane family
-fleshy, almost succulent

Front 33

Poaceae

Back 33

Grass family
-leaves have parallel veination
-flowers are florets, inflorescence are spikelets

Front 34

Convolvulaceae

Back 34

Morningglory family
-twining growth habit
-leaves alternate
-flowers 5-petaled, often trumpet-shaped
-leaves usually arrowhead or heart-shaped

Front 35

Geraniaceae

Back 35

Geranium family
-fruit is schizocarp with a beak
-leaves simple or compound, deeply dissected

Front 36

Lamiaceae

Back 36

Mint family
-square stems
-leaves minty-smelling
-leaves opposite or whorled

Front 37

Scrophulariaceae

Back 37

Figwort family
-flowers perfect or bilabiate, arranged in a spike or raceme

Front 38

Liliaceae

Back 38

Lily family
-flowers in 3s or 6s, showy
-leaf tips taper to a long point
-usually produce bulbs

Front 39

Asteraceae

Back 39

Sunflower family
-inflorescence is head, secondarily arranged into corymbs, cymes, panicles or racemes
-flowers are disc, ray, or ligulate

Front 40

Cyperaceae

Back 40

Sedge family
-leaves 3-ranked
-culm is triangular and pithy
-inflorescence is spike or spikelet

Front 41

rachis

Back 41

main stem bearing flowers or leaves

Front 42

sessile

Back 42

without a stalk

Front 43

pedicel

Back 43

stalk of a flower

Front 44

petiole

Back 44

stalk/stem of a leaf

Front 45

raceme

Back 45

inflorescence where flowers are single on individual pedicels along an elongated rachis

Front 46

panicle

Back 46

inflorescence with two or more flowers on a branch arranged on an elongated axis

Front 47

umbel

Back 47

a flat-topped or rounded flower cluster where pedicels radiate from the same point; no rachis (hydrangea, geranium, etc)

Front 48

head

Back 48

an inflorescence composed of dense clusters of sessily flowers on a short axis

Front 49

radiate flower

Back 49

a mix or disk and ray flowers

Front 50

spike

Back 50

a type of inflorescence with perfect, sessile flowers along the rachis

Front 51

spikelet

Back 51

inflorescence of grasses

Front 52

grass leaf parts (4)

Back 52

bottom --> top
sheath, auricle, ligule, culm

Front 53

Liquid pesticide

Dry pesticide

Back 53

lb a.i./gal

lb a.i./lb