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1
There are 9 multiple choice questions in
this exercise. Answer by clicking on one of the
red letters (A, B, C, Or D). You will get a
feedback to your response. Click on the
button (to go back to the question) or
button(to go to the next screen/question).
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2
1. Weed control is particularly important in
rainfed sorghum because A. sorghum is a
legume. B. of slow initial growth. C.
sorghum is a shallow rooted crop. D. of severe
competition with grassy weeds.
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3
2. The critical period of weed competition in
sorghum crop. A. At sowing time B. Flowering
stage C. Tillering stage D. 2 to 4 weeks
after sowing
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4
3. When the first schedule for weed control
activity in sorghum should start? A. Before
sowing B. Immediately after germination C.
After the seedlings are established D. At
flowering
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5
4. An important parasitic weed in sorghum
crop A. Cynodon B. Striga C. Dodder D.
Field bind weed
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6
5. Efficient and effective weed control can be
achieved by A. manual weeding B. cultural
practices C. chemical control D. combining
the above 3 practices
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7
6. One of the cultural practices to minimize
weed competition in sorghum crop. A. use
organic manures B. apply more phosphorus C.
adopt good crop rotation D. use high yielding
variety
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8
7. Use of chemicals (herbicides) to control
weeds should be based on A. right
chemical B. know how to use the chemical C.
comparative advantage over manual weeding D.
all the 3 above
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9
8. Can you identify the weed in the picture?
A. Xanthium strumarium
(Cocklebur) B. Leucas aspera
(Dronapushpi) C. Amaranthus spp.
(Pigweed) D. I do not know
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10
9. Can you identify the weed in the picture?
A. Setaria spp. (Foxtail) B.
Cyperus rotundus (Purple nut sedge) C. Cynodon
dactylon (Bermuda grass) D. I do not know
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11
Thank you for completing this exercise. Now
you may review this Module or select next Module
i.e. Module X from Course contents.
12
Your answer is not correct. Sorghum is not a
legume. The correct answer is Weed control
is particularly important in rainfed sorghum
because of its initial slow growth.
13
Your answer is correct. Weed control is
particularly important in rainfed sorghum because
of its initial slow growth.
14
Your are right. The critical period of weed
competition in sorghum crop is 2 to 6 weeks after
sowing.
15
Your answer is not correct. The correct
answer is The critical period of weed
competition in sorghum crop is 2 to 6 weeks after
sowing.
16
Your are right. The first schedule for weed
control activity in sorghum should start even
before sowing so that the germinated seedlings
will not face any weed competition.
17
Your answer is not correct. The correct answer
is The first schedule for weed control
activity in sorghum should start even before
sowing so that the germinated seedlings will not
face any weed competition.
18
Your are right. Striga is an important
parasitic weed in sorghum crop.
19
Your answer is not correct. Cynodon and Field
Bind weed are important weeds in sorghum but they
are not parasites. The correct answer
is Striga is an important parasitic weed in
sorghum crop.
20
Your answer is not correct. Dodder is a
parasitic weed but do not affect sorghum
plants. The correct answer is Striga is an
important parasitic weed in sorghum crop.
21
Your are right. Efficient and effective weed
control can be achieved by combing
appropriately the 3 weed control practices.
22
Your answer is not correct. The correct answer
is Efficient and effective weed control can
be achieved by combing appropriately the 3
weed control practices.
23
Your are right. Adopting a good crop rotation
practice is one of the cultural practices which
helps to minimize weed competition in sorghum
crop.
24
Your answer is not correct. The correct answer
is Adopting a good crop rotation practice is
one of the cultural practices which helps to
minimize weed competition in sorghum crop.
25
Your are right. Use of chemicals (herbicides)
to control weeds should be based on the
availability of right chemical, know how to use
that chemical and with a comparative advantage
over manual weeding.
26
Your answer is partly correct. But, The
correct answer is Use of chemicals
(herbicides) to control weeds should be based on
the availability of right chemical, know how to
use that chemical and with a comparative
advantage over manual weeding.
27
Your are right. It is Amaranthus spp.
(Pigweed).
28
Your answer is not correct The weed in the
picture is Amaranthus spp. (Pigweed).
The above one is Cocklebur
29
Your answer is not correct The weed in the
picture is Amaranthus spp. (Pigweed).
The above one is Leucas aspera
30
If you could not identify, The weed in the
picture is Amaranthus spp. (Pigweed), a common
weed in sorghum crop.
31
Your are right. It is Cyperus rotundus (Purple
nut sedge)
32
Your answer is not correct The weed in the
picture is Cyperus rotundus (Purple nut sedge).
The above one is Foxtail
33
Your answer is not correct The weed in the
picture is Cyperus rotundus (Purple nut sedge).
The above one is Bermuda grass
34
If you could not identify, The weed in the
picture is Cyperus rotundus (Purple nut sedge), a
common sedge weed in sorghum crop.