Any herbicide whether natural or artificial that prevents other organisms from eating your crop cannot be effective and healthy at the same time. This applies a

Any herbicide whether natural or artificial that prevents other organisms from eating your crop cannot be effective and healthy at the same time. This applies also for vegetables that are naturally resistant to pests (e.g. Vegetable strains that are Much more bitter than the wild type ). The solution is to not to have an expectation that vegetables should be free of any insect or animal contact. But not everybody likes caterpillar bite marks on their vegetables.