Intercropping For Pest Reduction -- Successful Scientific Trials
Crop Intercrop Pest(s) Reduced Mechanism
Apple Phacelia sp., Eryngium sp San Jose scale, aphids Parasitic Wasps
  Weedy ground cover Tent caterpillar and codling moth Parasitic Wasps
Barley Alfalfa, red clover Aphids Predators
Bean Goosegrass, red sprangletop Leafhoppers Chemical Repellent
Brassicas Candytuft , shepherds purse, wormseed-mustard Flea beetles Chemical Repellent
  Similar-sized crops Rootfly, cabbage butterfly and moth Chemical Repellent, Predators
Brussels sprouts Weedy ground cover Imported cabbage butterfly Predators
  French beans, grasses Aphids Physical Interference
  White clover Cabbage root fly, aphids, white cabbage butterfly Visual Masking
  Clover Aphids Physical Interference
Cabbage Tomato Diamondback moth  
  Hawthorn Diamondback moth Attract Pest To Alternative
  Red and white clover Cabbage aphids, imported cabbage butterfly Physical Interference, Predators
  Clover Cabbage root fly Predators
  Green ground cover Imported cabbage butterfly Visual Masking
Crop Intercrop Pest(s) Reduced Mechanism
Carrots Onions Carrot fly" Chemical Repellent
Cauliflower Corn spurry Cabbage looper, flea beetles, aphids Predators
  Lamb’s-quarters Imported cabbage butterfly Predators
  White or red clover Cabbage aphids, imported cabbage butterfly Physical Interference, Predators
Collards Tomato, ragweed Flea beetle Chemical Repellent
  Pigweed, lambs-quarters Green peach aphid Predators
  Weedy ground cover Cabbage aphid Parasitic Wasps
  Weedy ground cover with wild mustards Flea beetle Predators
  Tomato, tobacco Flea beetle Chemical Repellent
  Weedy ground cover Flea beetle, cabbage butterfly  
  Weedy ground cover Flea beetles Visual Masking
Corn Wild parsnip, wild mustard, chickweed, Shepherds purse, and lady’s thumb smartweed Black cutworm Parasitic Wasps
  Pigweed Fall armyworm  
  Giant ragweed European corn borer Parasitic Wasps
  Sweet potatoes Leafbeetles Attract Pest To Alternative
Crop Intercrop Pest(s) Reduced Mechanism
Corn Beans Leafhoppers, leaf beetle, fall armyworm Physical Interference, Predators
  Beans, weeds Fall armyworm Predators
  Pigweed, Mexican Tea, goldenrod, beggertick Fall army worm Predators
  Soybean Corn earworm Predators
  Peanuts Corn borer' Visual Masking
  Clover Corn borer Physical Interference
Cow pea Sorghum Leaf beetle Chemical Repellent
Cucumber Corn, broccoli Striped cucumber beetle Physical Interference
Crucifers Wild mustards Cabbageworms Parasitic Wasps
Fruit trees Rye, wheat, sorghum used as mulch European red mite Predators
  Alder, bramble Red spider mites' Predators
Grapes Wild blackberry Grape leafhopper Parasitic Wasps
  Johnson grass Pacific mite Predators
  Sudan grass, Johnson grass Willamette mite Predators
  Kale, closely planted Aphids Visual Masking
Kale Weedy ground cover Beanfly Physical Interference
Mung beans New Zealand white clover Fruit fly Physical Interference
Crop Intercrop Pest(s) Reduced Mechanism
Oats Carrots Thrips Visual Masking
Onions Ragweed Oriental fruit moth Parasitic Wasps
Peach Strawberry Oriental fruit moth Predators
  Ragweed, smartweed, lamb’s quarters, goldenrod Oriental fruit moths  
Radish Broccoli Green peach aphids Parasitic Wasps
Soybean Corn, weed cover Corn earworm Parasitic Wasps
  Sicklepod Velvet bean caterpillar, green stink bug  
  Desmodium sp., Croton sp., Cassia sp. Corn earworm Parasitic Wasps
  Barley, wheat Monitored only predators of soybean pests Predators
  Rye Seedcorn maggot Physical Interference
Squash Corn Cucumber beetle Physical Interference
  Corn, cow pea Western flower thrips Predators
Sugar beet Manure Pests preyed upon by predatory ground beetles Predators
  Broccoli Green peach aphid Parasitic Wasps
Sweet potato Morning glory Argus tortoise beetle‘ Parasitic Wasps
Crop Intercrop Pest(s) Reduced Mechanism
Tamarack trees White spruce and shrubs Sawflies Chemical Repellent
Tomato Cabbage Flea beetles Chemical Repellent
  Cabbage Diamondback moth Chemical Repellent
Turnip Dutch white clover Cabbage root maggot Chemical Repellent
Vegetables Wild carrot Japanese beetle Parasitic Wasps
Walnut Weedy ground cover Walnut aphid Parasitic Wasps

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