TULSA MASTER GARDENER

TIPS

SEASONAL APPEARANCE of Some COMMON VEGETABLE PESTS

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December

This table is a listing of the statewide average of seasonal appearances of some of the pests that attack some of Oklahoma common vegetables. The actual appearance may be slightly earlier or later based on locale or unusual climatic conditions in any one year. In most cases, a pest is only listed once based on the average time of first occurrence or the peak damaging activity period of the pest. Some pests may continue to be active because of longer life spans or because of multiple generations.

This information has been extracted from "Major Horticultural & Household Insects of Oklahoma" Circular E-918 Oklahoma Cooperative Extension Service.

JANUARY/FEBRUARY

1. Few insects active but preplant applications for cutworms, white grubs, and wireworms can be made, if needed in late February.

MARCH

1. Cole crops
   • Cutworms (late month)
   • Flea beetles (late month)
2. Green Peas
   • Seedcorn maggot (late month)
3. Onions
   • Cutworms (late month)
   • Onion maggot (late month)
4. Radish
   • Flea beetles (late month)
5. Spinach
   • Seedcorn maggot (early month)
   • Green peach aphid (mid month)

APRIL

1. Asparagus
   • Cutworms (early month)
   • Asparagus beetle (mid month)
2. Beans
   • Seedcorn maggot (mid month)
3. Cole crops
   • Diamondback moth (early month)
   • Imported cabbageworm (early month)
   • Aphids (mid month)
   • Harlequin bug (late month)
4. Greens
   • Harlequin bug (mid month)
5. Green peas
   • Pea aphid (early month)
6. Lettuce
   • Aphids (mid month)
7. Onions
   • Onion thrips (early month)
8. Pepper
   • Cutworms (mid month)
9. Potato
   • Flea beetles (early month)
   • Colorado potato beetle (adults) (mid month)
10. Radish
    • Aphids (mid month)
11. Sweetcorn
    • Seedcorn maggot (early month)
    • Flea beetles (late month)
12. Tomato
    • Cutworms (mid month)

MAY

1. Bean
   • Leaf beetle (early month)
2. Cole Crops
   • Cabbage looper (early month)
3. Cucurbits
   • Spotted cucumber beetle (early month)
   • Striped cucumber beetle (early month)
   • Squash bug (mid month)
   • Melon aphid (late month)
4. Eggplant
   • Colorado potato beetle (early month)
   • Eggplant lace bug (mid month)
5. Potato
   • Colorado potato beetle (larvae)(mid month)
6. Sweetcorn
   • Chinch bug (early month)
   • Cutworms (mid month)
   • Corn leaf aphid (mid month)
   • Corn earworm (late month)
7. Tomato
   • Aphids (late month)

JUNE

1. Asparagus
   • Grasshoppers (late month)
2. Beans
   • Grasshoppers (late month)
3. Cucurbits
   • Squash vine borer (mid month)
   • Grasshoppers (late month)
4. Dill
   • Black Swallowtail butterfly (late month)
5. Southern pea
   • Grasshopper (late month)
6. Sweetcorn
   • Fall armyworm (late month)
   • Grasshoppers (late month)
7. Sweet potato
   • Flea beetles (early month)
   • Tortoise beetles (early month)
   • Grasshoppers (late month)
8. Tomato
   • Hornworms (early month)
   • Tomato fruitworm (mid month)
   • Tomato pinworm (mid month)
   • Blister beetles (late month)
   • Grasshoppers (late month)
   • Spider mites (late month)

JULY

1. Cole crops
   • Harlequin bug (late month)
2. Cucurbits
   • spider mites (late month)
3. Eggplant
   • Whiteflies (late month)
4. Southern pea
   • Cowpea aphid (early month)
   • Lesser cornstalk borer (mid month)
5. Tomato
   • Whiteflies (late month)

AUGUST

1.  
   • Nothing new

SEPTEMBER

1. Cole crops
   • Cabbage looper (early month)

OCTOBER

1. Cole crops
   • Imported cabbageworm (mid month)
   • Cross-striped cabbabeworm (mid month)
   • Diamondback moth (late month)
2. Spinach
   • Seedcorn maggot (mid month)
3. Turnip
   • Southern cabbageworm (early month)
   • Aphids (mid month)

NOVEMBER

1. Spinach
   • Green peach aphid (early month)

DECEMBER

1.  
   • Little insect activity

Table of CONTENTS