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last test Flashcards

(58 cards)

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1
Q

what is the archillies heal of the group 2

A

resistence

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2
Q

what is the mode of action of the group 2

A

amino acid inhibiter

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3
Q

what amino acid is not formed after application of group 2

A

branched chain amino acids

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4
Q

what are group 2 commonly reffered to as

A

channel blocker

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5
Q

the group 2 restrict root growth what does that affect the plant

A

reduced micronutrient uptake

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6
Q

what are three sulfonyl urea herbicides that produce grass control

A

accent option pinnical

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7
Q

what are 6 sulfonyl urea that provide exclucivly broadleaf control

A

classic
muster
peak
permit
pinnical
refine

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8
Q

what are three sulfonyl urea herbicides that provide little residuel weed control

A

accent
option
pinnical

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9
Q

what are three silfonyl urea that do prodice residual weed control

A

permit
classic
prism

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10
Q

generally when are sulfonyl urea applied

A

POST

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11
Q

how are sulfonyl urea herbicides translocated

A

appoplasticaly and symplasticalyl

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12
Q

what should be added to the spray tank to improve postemergence activity of most sulfonyl urea herbicides

A

adjuvant

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13
Q

what is the bassis of selectivity with thesulfonyl urea herbicides 3

A

differential metabolism
‘’ adsorbtion
‘’ translocation

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14
Q

the SU’sare rapidly degraded in the soil by 2

A

chemical hydrolics and microbial degridation

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15
Q

which SU provides the best control of wirestem muhly

A

option

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16
Q

which weeds do peak and permit control in corn

A

anual broadleaf weeds

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17
Q

in addition to annual broaodleaf weeds what are two other weeds that peak has activity on

A

wild carot and perenial sowthisle

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18
Q

describe the injury symtptoms of the SU in corn 7

A

discouloration
crinkled leafs
leaves dont unfold
stunded growth
delay in plant defvelopment
secondary tiller development
pinched ears

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19
Q

injury in corn from su is due to reduced metabolism what are 4 factors that increas this

A

fluctuating temps
warm temps
use of insectisides
sensitive hybrids

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20
Q

which weeds do pinnical and clasic primarly control in soybeans

A

broadleaf weeds

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21
Q

describe the 5 injury symptoms of SU in soybeans

A

yellow leaf margins
red purple veining
leaf crinkling
stunting
death of growing point

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22
Q

what are two weeds that refine sg is particularly effective on

A

chickweed and wild carrot

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23
Q

pursuit is absorbed by the 2

A

roots
foilage

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24
Q

what is the primary selectivity with pursuit

Study These Flashcards
A

differential metabolism

25
describe the 5 injury symptoms of pursuit on soybeans
yellow leaf margins red purple viens leaf crinkling stunting death of growing point
26
where/when would you expect to see crop damage from pursuit the next planting year 5
low rainfall high clay low ph high om heavy rainfall previus years
27
what group of weeds do broadstrike and firstrate control
anual broadleaf
28
what plant structures absorb broadstrike and first rate
meristem
29
what are three important broadleaf weeds that firstrare is weak on when applied post
lambsquarter pigweeds eastern black nightshade
30
why is rainfall so important with soil aplied herbicides
so it is properly absorbed by the soil
31
describe the injury symptoms of broadstrike and first rate on soybeans 5
narrow elongated stems leaf crincling chlorosis stunting reduced root growth
32
what are five conditoins where the injury of broadstrike and firstrate will be increased
freezing temps wet conditions high soil moisture high soil ph low om
33
how are broadstrike and firstrate broken down in the soil
microbial degridation
34
what is the primary reason for group two resistence
altered target site
35
what are two reasons herbisiced were developed during ww11
kill food crops kill deciduous trees
36
what group of weeds fo group 4 herbicides control
broadleafs
37
what are two crops that group 4 is used on
cerials and corn
38
why did farmers rapidly adopt phenoxy herb 5
low toxisity low cost low application rates wide margin of crop saftey exelent efficacy
39
which herbicide 24d or mcpa is safe on cereals
mcpa
40
where is mcpb mcpa used primarly
weed control in peas
41
which herbiscide 24d or mcpa is safe in corn
24d
42
where is 24d used primarly
seed control for alfalfa
43
what are two trade names for dicamba
engenia xtendamax
44
ehat crop is engenia and xtendamax registered on
rr extend sobeans
45
what two crops is enlist duo registered for use on
corn e3soybeans
46
generally what is the recomended application timeing for group 4
POST
47
a fall aplication of the group 4 herbisides is very effective for the control of q
perenial broadleaf weeds
48
the group 4 herbicide is adsorbed through the
foilage
49
what is the primary way group 4 herb is translocated
symplasticaly
50
where do the group 4 herb accumilate in the plant
meristem
51
the group 4 cause a number of growth abnormalities name 5
increased cell elongation twinsting stems distorted leaf deat of meristematic tissue damage to the vascular system
52
describe why alfalfa is tolerant to 24d
they dont convert it to a harmfull chemical
53
what is the basis of selectivity with group 4 herbisides 4
differential metabolism '' interception '' adsorbtion '' translocation
54
what are 4 important weeds that the phenoxes are weak on
buckwheat wild caroot chickweed fleabane
55
what are 5 weeds that dicamba is weak on
canola musterds nightshade velvet leaf waterhemp
56
under what condisoins would you expect good control of weeds with group 4 3
young activly growing good moisture
57
the rate of a group 4 should be adjusted based on 2
weed species weed size
58
do the group 4 have good residual control
no very little

crop diagnostics (5 decks)

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