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plsc 375 > herbicide specifics > Flashcards

herbicide specifics Flashcards

1
Q

Group 2 Sulfonylurea chemical name example

A

Tribenuron

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2
Q

group2 Imidazolinine chemical name example

A

Imazamox

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3
Q

group 2 Triazolopyrimidine chemical name example

A

Florasulam

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4
Q

group 2 target site and MOA

A

ALS or AHAS

-Inhibit branched chain amino acids synthesis

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5
Q

group 2 injury symptoms

A

yellowing, reddening and purpling in growth points

if not death, apical meristem death –> Weird branching

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6
Q

Imazamox (group 2) can control what weed?

A

Lambs quarters

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7
Q

Florasulam (group 2) can control what weed?

A

Canada thistle

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8
Q

group 3 chemical name example

A

Trifluralin

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9
Q

group 3 target site and MOA

A

tubulin - microtubules

prevents microtubules from completing mitosis

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10
Q

group 3 injury symptoms

A

no germination

lack of cekk division

sub lethal- club and brittle roots

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11
Q

group 3 foliar or soil applied?

A

soil

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12
Q

group 4 foliar or soil applied?

A

foliar

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13
Q

group 4 inhibits?

A

auxin

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14
Q

group 4 target site and MOA

A

Bind to auxin binding proteins in cytosol or plasma membrane
mimic plant auxin

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15
Q

group 4 injury symptoms

A

strange growth

leaf cupping

stem swelling

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16
Q

group 5,6,7 inhibits…

A

photosynthesis / PS2

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17
Q

group 5 chemical name example and crop used on

A

Cyanazine - corn

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18
Q

group 5 target site and MOA

A

D1 protein in PS2

effect the binding of plastoquinone (blocking electron movement)

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19
Q

group 5/6/7 symptoms

A

chlorosis/necrosis

blotchy chlorotic patches first near leaf margin

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20
Q

group 6 chemical name example and crop

A

Bromoxynil - annual broadleaf weeds in cereals

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21
Q

group 6 target site and MOA

A

binds with plastoquinone pool at site B

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22
Q

group 9 inhibits…

A

aromatic amino acids

23
Q

group 9 chemical name

A

glyphosate

24
Q

group 9 target site and MOA

A

shikimate pathway

inhibits aromatic amino acids - leads to buildup of toxins

25
Q

group 9 symptoms

A

growth ceases quickly

death more slowly - 1-3 weeks

26
Q

group 9 injury mistaken for …

A

group 2 injury - group two will be selective

27
Q

group 10 inhibits…

A

glutamine synthesis

28
Q

group 10 chemical

A

glufosinate

29
Q

group 10 target site and MOA

A

Binds to site of glutamine synthesis

results in rapid accumulation of excess ammonia - toxic - inhibition of photosynthesis

30
Q

group 10 symptoms

A

chlorosis and wilting 3-5 days

31
Q

what do group 11’s inhibit?

A

carotenoid biosynthesis

32
Q

group 11 herbicide

A

amitrole

33
Q

what do group 13’s inhibit?

A

DOXP

34
Q

Group 13 herbicide

A

Clomazone

34
Q

Clomazone foliar or soil applied?

A

soil applied

34
Q

Clomazone (13) symptoms

A

seeds emerge but are bleached and become necrotic

35
Q

Group 14 inhibits?

A

PPO

36
Q

group 14 herbicide

A

sulfentrazone

37
Q

sulfentrazone pre or post emergance?

A

pr- emergance

38
Q

sulfrentrazone (14) weeds controlled

A

annual dicots - kochia, RR pigweed…

39
Q

sulfrentrazone (14) crops use

A

chickpea, flax, sunflower, field pea, soybean

40
Q

group 14 target site and MOA

A

inhibit heme and chlorophyll synthesis

41
Q

group 14 injury

A

leaves water-soaked

42
Q

group 22 inhibits…

A

photystem 1

43
Q

group 22 contact or soil?

A

contact - non-selective

44
Q

group 22 herbicide

A

Diquat

45
Q

diquat (22) crops used

A

pulses, flax, mustard, canola (dicots)

46
Q

group 22 target site and MOA

A

Divert electrons from PS1

accepts electrons from PS2 = superoxide

destroys membrane fatty acids and chlorophyll

47
Q

group 22 injury

A

rapid contact bleaching or chlorosis

48
Q

group 27 herbicides inhibit…

A

HPPD

49
Q

group 27 herbicide

A

Mesotrione

50
Q

group 27 target site and MOA

A

inhibits HPPD

Key enzyme in plastoquinone biosynthesis - loss of chlorophyll

51
Q

group 27 symptoms

A

bleaching

plsc 375 (18 decks)

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