Common Vegetable Diseases in Mississippi

Alan Henn and David Ingram

ahenn@ext.msstate.edu

Extension Plant Pathologists

Mississippi State University

Spring 2003

1. Asparagus

2. Rust

1. Beans, snap and pole

   2. Root and stem rots

      1. Pythium

      2. Rhiz: sore shin symptom

      3. Scler. Rolfsii

         Fusarium

   3. Aerial Web blight

   4. Mosaic Virus complex

   5. Seed Pitting (yeast spot)

   6. Low pH

Other diseases:

Rust

Pod Blight

Rhiz

Sclerotinia

Root-knot nematode

Mn toxicity

3. Bean, Lima

   1. Root rot

      1. Rhizoctonia

      2. Sclerotium rolfsii

   2. Anthracnose

   3. mosaic

4. Cabbage

1. Wire Stem

2. Black rot *

3. Downy mildew

4. Alternaria

5. Cercospora leaf spot

soft rot

Black heart (boron deficiency)

5. Carrots

   1. Scerotium rolfsii

   2. Root-knot nematode

   3. Pythium

6. Collards

   1. Downey Mildew

   2. Alternaria

      wire stem

7. Corn, Sweet

   1. Common smut

   2. Herbicide: Dual followed by cold rain causing 'leaf stick'

      Helminthosporium

      Rust (common)

8. Cucumbers (all cucurbits)

   1. Gummy stem blight

   2. Downy mildew

   3. Powdery mildew

   4. Virus: WMVII, CMV

   5. blossom end rot

   6. Fruit or belly rot (Choanophora, Pythium)

anthracnose

9. Pea, English (BYPASS)

Root and stem rots

Powdery mildew

10. Pea, southern

    1. Mosaic

    2. Southern blight

    3. Cercospora leaf spot

    4. Herbicide damage esp. rotated behind corn where atrazine used)

       anthracnose

11. Pepper

    1. Sun scald

    2. Blossom-end rotate

    3. Sclerotium rolfsii

    4. TSWV

    5. Bacterial Spot (fruit)

Bacterial leafspot

Anthracnose

Pepper (continued)

Cercospora leaf spot

TMV

Mosaic Complex

Root-knot

12. Squash

    1. Virus, Mosaic

    2. Powdery mildew

    3. Downy mildew

Silver leaf

Phytophthora capsici

13. Sweet Potato

    1. Scurf

    2. bacterial wilt

    3. Root-knot nematode

Bacterial stem rot

Bacterial soft rot

Black rot

Scurf

Southern blight

Mosaic

Boron Deficiency

14. Tomato

    1. Alternaria (early blight)

    2. TSWV

    3. Blossom end rot

    4. Southern Blight

    5. Leaf rolls (fertility)

    6. Bacterial spot & speck

    7. Bacterial Wilt

       Other diseases:

Fusarium wilt

Fusarium crown rot

Pythium root rot

Septoria leaf spot

Botrytis

Anthracnose

15. Turnips Greens

    1. White spot

16. Watermelon

    1. Gummy stem blight

    2. Anthracnose

    3. Fruit blotch (note send to David, do not diagnose)

    4. Virus complex

    5. Blossom end rot