Intrepid can be thought of an upgrade of Confirm, and is generally more efficacious, as it has longer residual activity against some pests. In crops where it is currently registered, Intrepid has a fairly short pre-harvest interval. For example, the preharvest interval for Intrepid is one day in strawberries, versus 14 days for Confirm in caneberries. With this in mind, it will be worth pursuing an Intrepid label similar to strawberries in caneberries. Replacing Confirm with Intrepid for most crop uses is a worthy goal.
There are pesticides mentioned for management of leafrollers in this article. Before using any of these products, check with your local Agricultural Commissioner's Office and consult product labels for current status of product registration, restrictions, and use information.
The following is in regards to an infestation of light brown apple moth (LBAM) causing economic (approximately 20% or greater loss) damage in blackberries. This occurred in a single field several weeks ago, and has since been addressed by the grower and regulatory agencies.
This information is being provided in the interest of emphasizing to the grower community that this pest is not only a regulatory problem now, but is capable of becoming an economic problem as well. It is imperative then that growers undertake appropriate control measures to minimize the chance of infestation.
The following refers to trap counts taken on June 2 of Drosophila suzukii, previously (incorrectly) identified in this post as Drosophila biarmipes.
Several raspberry fields have fairly high counts of D. suzukii now. One in the vicinity of Peckham Rd and another on Riverside Rd have counts in excess of 50 D. suzukii males (identified by the spots on the back of each wing) per trap, numbers which would be consistent with some fruit damage. Another raspberry planting on Thompson Rd also has seen an increase to 28 male flies found in one trap. It is recommended in these cases to start a program of control.
Two farms which have been applying GF 120 fruit fly bait since the end of March/ beginning of April have seen sharp reductions in the numbers of D. melanogaster and D. suzukii trapped. While this is not a controlled study with an untreated check, it does suggest that consistent, weekly applications of GF 120 fruit fly bait are useful in reducing numbers of this pest.
Another point of interest is that one raspberry plantation that had increasing numbers of vinegar flies (both D. melanogaster and D. suzukii) made a series of 3 applications of Entrust (which contains the same active ingredient as GF 120 fruit fly bait) over a two week period to control leaf rollers. The last trap reading had a single vinegar fly found, again suggesting some effect of this pesticide on the vinegar fly population. However, this is not a trial with an untreated control, so this evidence should be understood as being anecdotal only.
To date, blackberry fields have had very few flies trapped.