Rutgers Cooperative Extension
Seasonal updates on diseases, insects, weeds impacting tree fruit and small fruit (blueberry, cranberry, and wine grape). Fruit Pest Alerts are also available via this category feed.
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Oriental Fruit Moth (OFM): We are between 2nd and 3rd generation broods in southern counties, but still treating emerging larvae in northern counties. Growers who have trap counts that are less than 6 moths per trap can skip insecticides that are intended for OFM. If trap counts are higher, then time your sprays according to the following table:
[Read more…]
Grape berry moth is one of the key direct pests of grapes in NJ. Females lay their eggs on the berry and the larvae makes a small entry hole and then feeds inside the berry. Webbing may be observed as the larvae move between berries.
A threshold of 10% webbing has been used in NY grapes.The MSU model predicted degree-day timing for Intrepid or Altacor applications against grape berry moth to be last Thursday in South Jersey (Bridgeton).
Due to the storm and the rains last week, applications may have reduced efficacy or were not able to be applied. If you have a history of grape berry moth pressure, today would be the tail end of timing for conventional materials. These include pyrethroids, like Bifenture or Danitol, or Imidan. Please read the label carefully as Imidan has a long re-entry interval. Also as a reminder, phytoxocitiy has been observed with using “EC” formulations of insecticides, such as Danitol, with Captan.
Auditors have noted that on handwashing stations some have a label which says “Not potable water.” If a grower is doing the USDA GAP or Harmonized audits, the water in handwashing stations must meet the “Microbial standard for drinking water.” If a label is on the wash station marked not potable, the grower is not in compliance. Check G-9 in the GAP or 2.2.5 in the Field Operations and Harvesting Harmonized Food Safety Standard for more details.
Oriental Fruit Moth (OFM): Second generation flights are very low in most areas. By all indications this generation should produce much lower pressure than the 1st generation. Any insecticides which are applied now should target this generation. Growers who have trap counts that are less than 6 moths per trap can skip insecticides that are intended for OFM. If trap counts are higher, then time your sprays according to the following table:
[Read more…]
Cranberry beds are in full bloom. If insects have been effectively managed prior to bloom, we recommend no sprays at this time. A reminder: when bees are present, your only choices of insecticides are insect growth regulators (IGRs) such as Intrepid 2F or Bt products such as DiPel.
During bloom we recommend monitoring insect populations using pheromone traps. Pheromone traps should be used particularly to monitor activity of Sparganothis fruitworm and blackheaded fireworm, two key pests in New Jersey.
Sparganothis Larvae
Sparganothis Adult
Brown Marmorated Stink Bug (BMSB): Adults are occasionally seen during orchard scouting. Knock down materials will be required for the remainder of the season in orchards with BMSB populations.
Oriental Fruit Moth (OFM): Second generation flights are very low in most areas. By all indications this generation should produce much lower pressure than the 1st generation. Any insecticides which are applied now should target this generation. Growers who have trap counts that are less than 6 moths per trap can skip insecticides that are intended for OFM. If trap counts are higher, then time your sprays according to the following table:
[Read more…]
