Fruit Crops Edition - Cranberry Section

Seasonal updates on diseases, insects, weeds impacting small fruit (blueberry, cranberry, and wine grape). Fruit Pest Alerts are also available via this category feed.
 
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July 28, 2016

The Cranberry Toad Bug – An Emerging Pest of Cranberries

We are seeing nymphs of toad bugs in cranberry beds. Growers need to be aware of this insect and treat if numbers reach high levels (there is no current threshold). We are currently conducting studies to estimate the density of toad bugs that can cause economic injury to cranberries.

Life cycle. Toad bugs, Phylloscelis atra, feed only on cranberries. This insect has a single generation per year. It overwinters as eggs. The nymphs appear by the end of June through August, and the adults from August through October. Eggs are laid from September through October. [Read more…]

Filed Under: Cranberry, Fruit
July 11, 2016

Size Peaches with Supplemental Irrigation

NJ peach orchards demand supplemental irrigation when drought weather patterns persist. Peaches gain up to 70% of their final volume during the last 30 days on the tree, so sizing fruit to their full potential requires supplemental irrigation. July and August are critical months for fruit sizing for most varieties. Inadequate irrigation during critical stages of fruit development results in smaller fruits and irreversible size/marketing losses. Irrigating closer to harvest will not increase fruit size. [Read more…]

Filed Under: Blueberry, Commercial Ag Updates, Cranberry, Fruit, Tree Fruit
July 8, 2016

Sparganothis Fruitworm Degree-Day Update: as of July 6, 2016

As of July 6, Sparganothis has accumulated 1,175 DD. Based on the DD model, Sparganothis has passed peak flight, and is laying eggs. Reminder that a single insecticide application, i.e., post-bloom application with Delegate, Altacor, Diazinon, or Intrepid, aimed at Sparganothis larvae will likely have the greatest effect if it is timed for peak egg-hatch/larval-emergence, which is approximately 1,400 DD and should coincide with early next week. I will keep you updated on these predictions as the season progresses.

Life history benchmarks for Sparganothis fruitworm and associated degree-day estimates (credit: Elissa Chasen and Shawn Steffan, USDA-ARS and UW Entomology).

Life history benchmarks for Sparganothis fruitworm and associated degree-day estimates (credit: Elissa Chasen and Shawn Steffan, USDA-ARS and UW Entomology).

 

Filed Under: Cranberry, Fruit
July 7, 2016

Sparganothis Fruitworm Degree-Day Update: as of July 6, 2016

As of July 6, Sparganothis has accumulated 1,175 DD. Based on the DD model, Sparganothis has passed peak flight, and is laying eggs. Reminder that a single insecticide application, i.e., post-bloom application with Delegate, Altacor, Diazinon, or Intrepid, aimed at Sparganothis larvae will likely have the greatest effect if it is timed for peak egg-hatch/larval-emergence, which is approximately 1,400 DD and should coincide with early next week. I will keep you updated on these predictions as the season progresses.

Life history benchmarks for Sparganothis fruitworm and associated degree-day estimates (credit: Elissa Chasen and Shawn Steffan, USDA-ARS and UW Entomology).

Life history benchmarks for Sparganothis fruitworm and associated degree-day estimates (credit: Elissa Chasen and Shawn Steffan, USDA-ARS and UW Entomology).

 

Filed Under: Cranberry, Fruit
June 28, 2016

Sparganothis Fruitworm Degree-Day Update: as of June 27, 2016

As of June 27, Sparganothis has accumulated 968 DD. Based on the DD model, Sparganothis has reached peak flight, and should have started egg laying. Reminder that a single insecticide application, i.e., post-bloom application with Delegate, Altacor, Diazinon, or Intrepid, aimed at Sparganothis larvae will likely have the greatest effect if it is timed for peak egg-hatch/larval-emergence, which is approximately 1,400 DD. I will keep you updated on these predictions as the season progresses.

Filed Under: Cranberry, Fruit, Uncategorized
June 22, 2016

Sparganothis Fruitworm Degree-Day Update: as of June 21, 2016

Based on our degree-day model for Sparganothis fruitworm, flight initiation was predicted around 595

Life history benchmarks for Sparganothis fruitworm and associated degree-day estimates (credit: Elissa Chasen and Shawn Steffan, USDA-ARS and UW Entomology).

Life history benchmarks for Sparganothis fruitworm and associated degree-day estimates (credit: Elissa Chasen and Shawn Steffan, USDA-ARS and UW Entomology).

DD, and indeed, Sparganothis flight begun in Chatsworth, NJ, the week of June 6. As of June 21, Sparganothis has accumulated 839 DD. Based on the DD model, Sparganothis peak flight is predicted by the end of this week (884 DD). Although moths should have begun laying eggs, these eggs should not be hatching until early next week (895 DD). Reminder that a single insecticide application, i.e., post-bloom application with Delegate, Altacor, Diazinon, or Intrepid, aimed at Sparganothis larvae will likely have the greatest effect if it is timed for peak egg-hatch/larval-emergence, which is approximately 1,400 DD. I will keep you updated on these predictions as the season progresses.

Sparganothis fruitworm Adult

Sparganothis fruitworm Adult

Filed Under: Cranberry, Fruit, Uncategorized