Tree Fruit Research & Extension

New Insecticides for Apple and Pear IPM

Neonicotinyls

Provado (imidacloprid) – Provado was the first registered compound of the relatively new class of synthetic analogs of nicotine, neonicotinyls. Provado, and other neonicotinyls, act in the nerve synapse like nicotine acetylcholine. In tree fruits it is generally used as a systemic insecticide and stomach poison. It does have contact insecticidal properties, however the residue is relatively short-lived in the environment. Instead, it is absorbed into leaves, where is can have a long effective residue. Provado is relatively safe for mammals. (more...)

Actara (thiamethoxam) – Actara is a closely related compound to Provado. Its activity and use is much the same as Provado, with the same target pests and transtemic activity. Do not use Actara 5 days prior to placing bees in orchard and while bees are in the orchard, and exercise caution when bees are in neighboring blocks, especially if there are blooming weeds in the orchard. As of 2004, Actara was no longer available for use in apple. (more...)

Assail (acetamiprid) – Assail is the first neonicotinyl registered on apples and pears that has a high degree of lepidopteran activity, although it is primarily limited to codling moth. A short worker reentry interval (12 hrs), relatively short preharvest interval (7 days) and relatively low toxicity rating (Category III) allow more flexibility with Assail than the organophosphate insecticides that it will replace. Practical resistance management would suggest that growers should limit the number of neonicotinyl applications in a season, so care must be taken when adding Assail to a program that is already using Provado or Actara. (more...)

Calpyso (thiacloprid)- Calypso is next in the line of neonicotinyls registered on apples and pears that has lepidopteran activity, also primarily limited to codling moth. Calypso and Assail are very similar products, with regards to toxicity and efficacy against most pests. Practical resistance management would suggest that growers should limit the number of neonicotinyl applications in a season, so care must be taken when adding Calypso to a program that is already using Provado, Actara or Assail. Calypso also has a more restrictive label than Assail. For example, Calypso has a 30 day PHI, applications are not allowed between pink and petal fall in both pears and apples, 100 ft buffer for aerial applications near rivers and streams, and several endangered species restrictions (see label). (more...)

Clutch (chlothianidin)- Clutch is another neonicotinyl with lepidopteran activity. Clutch will be registered with very little field efficacy data, so implementing this new insecticide into an IPM program should be done carefully. (more...)

Tree Fruit Research & Extension Center, 1100 N. Western Ave, Wenatchee, WA, 509-663-8181, Contact Us