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fruit and vegetable varieties is my favorite low-work method of insect control in our own garden.
    Resistant varieties
    Japanese beetles prefer French hybrid grapes over American grapes.
     
    Japanese beetles taught me my first lesson about variety selection. We had a terrible problem with these invasive beetles on our grapevines until I realized that French hybrid varieties are much more tasty to Japanese beetles than are American varieties. The latter can be distinguished by their thicker leaves, which are often whitened underneath, and by the relative paucity of beetles chowing down on the leaves. In addition to grapes, Japanese beetles also defoliated our young sweet-cherry tree, but damage on other plants seemed to stay at low enough levels that the trees could shrug it off. After switching our small vineyard over to American grapes and removing our cherry tree, the Japanese beetle pressure was reduced to the point where hand-picking was sufficient to keep beetles at bay.
    In general, variety selection can be a helpful strategy in controlling at least five of the dirty-dozen worst garden pests in the U.S. The table below includes pest-resistant varieties drawn from several different extension-service websites and other sources.
     
    Insect-resistant vegetable varieties
Pest insect
Insect-resistant varieties
Cabbageworms
Collards, Brussels sprouts, broccoli, and cabbage are tastier to these insects than are other crucifers. Within each type of vegetable, vegetables with dark green, glossy leaves are more resistant to cabbageworms, while cabbage butterflies sometimes avoid laying eggs on red cabbage varieties. Resistant cabbage varieties include Chieftan Savoy, Early Globe, Mommoth, Red Acre, Red Rock, Round Dutch, and Savoy Perfection Drumhead.
Corn earworms
Any corn with a tight husk will be more resistant to earworms. Specifically resistant varieties include Country Gentlemen, Golden Security, Seneca, Silvergent, and Staygold.
Cucumber beetles
In general, cucumber beetles prefer zucchini-type squash over others and don't like burpless cucumbers as well as other varieties. Blue Hubbard squash, Ashley, Chipper, Gemini, Piccadilly, Poinsett, and Stono cucumbers; Early Prolific, Scallop, Straightneck, and White Bush squash; and Galia, Passport, Pulsar, Rising Star, and Super Star melons are all reported to be resistant to cucumber beetles.

However, the more important issue is to select a variety resistant to the bacterial wilt carried by cucumber beetles. These wilt-resistant varieties include Connecticut Yellow Field, Harvest Moon, and Howden pumpkins; Waltham butternut; Buttercup squash; Black Beauty zucchini; and Ashley, Chinese Long, Chipper, County Fair, Eversweet, Gemini, Improved Long Green, Saticoy Hybrid, Sunnybrook, and Tokio Long cucumbers. Watermelons are usually resistant to bacterial wilt.
Squash bugs
Squash bugs prefer yellow summer squash over zucchinis, squash over pumpkins, pumpkins over gourds, and gourds over melons. Resistant varieties include acorn squash, butternuts, Early Summer Crookneck, Green Striped Cushaw, Improved Green Hubbard, Spaghetti, Sweet Cheese, and zucchinis (except for the susceptible Cocozelle).
Squash vine borers
Varieties resistant to squash vine borers tend to have thin, tough stems. In addition, vining types are more resistant than bush types since the former can root along their nodes and survive moderate levels of borer damage. The most resistant varieties include butternuts and Green Striped Cushaw, followed by Dickenson Pumpkin and Summer Crookneck. Other varieties reputed to have at least some resistance include acorn squash, Cucuzzi (also known as snake gourd), and Connecticut Field, Dickenson, and Small Summer pumpkins.
     
    Row covers
    Flea beetles aren't a major problem on most vegetables, but they tend to kill eggplants in our area.
     
    Of course, if you don't plant cucurbits, you won't have to deal with squash vine borers, cucumber beetles, and squash bugs at all.