![]() ![]() Natwick (emeritus), UC Cooperative Extension Imperial CountyĬ.S. UC IPM Pest Management Guidelines: TomatoĮ.T. Mode-of-action group numbers are assigned by IRAC (Insecticide Resistance Action Committee). For example, the organophosphates have a Group number of 1B chemicals with a 1B Group number should be alternated with chemicals that have a Group number other than 1B. Rotate chemicals with a different mode-of-action Group number, and do not use products with the same mode-of-action Group number more than twice per season to help prevent the development of resistance. Permit required from county agricultural commissioner for purchase or use. The longer of these two intervals is the minimum time that must elapse before harvest may take place. Preharvest interval (PHI) is the number of days from treatment until harvest can take place. Restricted entry interval (REI) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Do not use if psyllids are in the field as carbamates tend to promote development of their populations also if leafminers are present, it may cause outbreaks by destroying their natural enemies. Good coverage by ground application (preferred application method) is necessary to reach the soil surface and lower fruit in the plant canopy. Do not spray directly or allow to drift onto blooming crops or weeds where bees are foraging.ĬOMMENTS: Use only when cutworms are detected feeding on fruit. Heavy infestations require a second application in 4 or 5 days.ĬOMMENTS: Ground application. Always read the label of the product being used.ĬOMMENTS: Apply when eggs first hatch to target young larvae. When choosing a pesticide, consider information relating to air and water quality, resistance management, and the pesticide's properties and application timing. ![]() The following are ranked with the pesticides having the greatest IPM value listed first-the most effective and least harmful to natural enemies, honey bees, and the environment are at the top of the table. Not all registered pesticides are listed. Pesticide precautions Protect water Calculate VOCs Protect bees
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