Laboratory Manual

Experiment #7. Plant Nutrient Deficiency Symptoms, Insects, and Diseases

Maroon Divider
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NUTRIENT DEFICIENCY SYMPTOMS

LINKS

http://www.agr.state.nc.us/cyber/kidswrld/plant/index.htm

Slide number

---------------------------Symptom------------------------

1

Nitrogen deficiency, tomato

2

Phosphorus deficiency, tomato upper side of leaf

3

Phosphorus deficiency, tomato bottom side of leaf

4

Potassium deficiency: tomato | cucumber |

5

Calcium deficiency:tomato | corn| lettuce | cucumber | tomato

6

Calcium deficiency, tomato blossom-end rot

7

Magnesium deficiency, tomato leaf

8

Magnesium deficiency, tomato very severe

9

Iron deficiency: blueberry | corn | borage

10

Molybdenum deficiency, cauliflower

11

Sulfur deficiency, tobacco

12

Phosphorus deficiency, corn

13

Potassium deficiency, corn

14

Calcium deficiency, zinnia

15

Calcium deficiency, marigold

16

Ammonium toxicity, tomato

17

Ammonium toxicity, tomato severe

18

Ammonium toxicity, tomato also typical of salt injury

PLANT DISEASES

LINKS

http://www.ces.ncsu.edu/resources/pests/

http://edis.ifas.ufl.edu/


Slide number

-------------Disease-----------

-------------------------------Control----------------------------------

1

Late blight of potato (foliar)

Fungicides; certified seed pieces; destroy volunteers.

2

Late blight of potato (tuber)

3

Potato scab

Soil pH 5.3; use scab-free seed pieces.

4

Potato black leg

Well-drained soil; use well-corked or whole seed pieces and certified seed pieces.

5

Tobacco mosiac virus on tomato (foliage)

Eradicate diseased plants; control insects and weeds; avoid tobacco, and wash hands in soapy water or milk before handling plants.

6

Tobacco mosiac virus on tomato (fruit)

7

Cucumber mosaic virus on tomato

Eradicate plants; control tomato insects and weeds; wash hands frequently when handing plants.

8

Fusarium wilt on tomato

Select resistant varieties.

9

Walnut wilt of tomato

Do not plant under walnut trees.

10

Verticillium wilt of eggplant

Select resistant varieties; use long rotations without eggplant; fumigate; mulch with plastic.

11

Powery mildew on cucumber

Select resistant varieties; control insects and diseases.

12

Cucumber scab

Select resistant varieties; use fungicides.

13

Mosaic on cucumber (foliage)

Select resistant varieties; control insects and weeds.

14

Mosaic on cucumber (fruit)

15

Bacterial wilt of muskmelon

Rotate crops; control beetles.

16

Fusarium wilt of muskmelon

Use treated seeds, sanitation, rotation, and resistant varieties.

17

Tobacco mosaic virus on pepper

Eradicate plants, insects, and weeds.

18

Neck rot of onion

Sanitation in storage; fungicides in field.

19

Fusarium pink rot on onion

Use resistant varieties on clean, well-drained soil.

20

Downy mildew of lettuce

Control weeds. Use disease-free seed; rotate crops.

21

Bottom rot of lettuce.

Dry, well-drained soil

22

Soft rot of lettuce

Avoid wet areas; harvest on time; avoid bruising.

23

Mosaic virus on lettuce

Use virus-free seeds; eradicate plants and weeds; control insects.

24

Anthracnose on bean

Use fungicide; new seed

25

Sunscald on bean

26

Mildew on bean

Use fungicide; try rotations.

27

Virus on bean

Control insects, weeds, and infected plants.

28

Yellows (mycoplasma) of carrot

Control insects and weeds; eradicate diseased plants.

29

Virus on cabbage

Select varieties; clean up garden; control weeds and insects.

30

Alternaria leaf spot of cabbage

Good garden sanitation; not too much N; use fungicides; destroy cabbage worms.

31

Club root of cabbage

Good garden sanitation; inspect transplants; use sterilized soil in starting transplants; kill weeds; lime soil to pH 7.2; use long rotations without crucifers.

32

Smut on corn

Good garden sanitation; rotation; no smut in compost pile; control earworm and corn borer.

 

 INSECTS

LINKS

http://www.ces.ncsu.edu/resources/pests/

http://edis.ifas.ufl.edu/

Slide

Insect

1

Root-knot nematode (microscopic worms) okra

2

Leaf hoppers

3

Whiteflies

4

Armyworm larvae; another

5

Armyworm adult

6

Tomato hornworm

7

Cabbage looper caterpillar

8

Cabbage eaten by caterpillar

9

Corn earworm; another

10

White grubs of May or June beetle

11

Millipede

12

Bean aphids

13

Aphids on rose

14

Thrips

15

Earwig

16

Black scale

17

Hemispherical scale

18

Mealy bug

19

Cyclamen mite damage

20

Spotted cucumber beetle

21

Cabbage maggot

22

Plant wilted from cabbage maggot

23

Lacewing injury on Pieris

24

Asparagus beetle

25

Colorado potato beetle

 WEEDS

http://cropandsoil.oregonstate.edu/weeds/id.html

 

Maroon Divider

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Description | Syllabus | Notes |Guide | Internet | Lab Manual|Exams and Quizzes|Results|More|
Maroon Divider

Produced and maintained by Allen Barker
University of Massachusetts, Amherst.