The following insect pests bear special mention for early-season scouting in cranberry bogs.
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Blackheaded Fireworm

Blackheaded fireworm eggs overwinter on the bed and usually hatch by around mid-May. It is important to catch the first generation, if possible, because the second generation occurs during bloom and is typically much more destructive. Blackheaded fireworm larvae can be detected by sweep net sampling and it is good idea to look along the edges of bed where vines first begin to grow.

Blackheaded fireworm Larva Photo:D.Schiffhauer

Blackheaded fireworm Adult Photo:D.Schiffhauer

Blackheaded fireworm is much easier to control if detected during the early part of the season.

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Degree-day benchmarks indicate discrete biological events in the development of insect pests. For the Sparganothis fruitworm, recent studies conducted by Dr. Shawn Steffan (USDA-ARS/University of Wisconsin-Madison), Annie Deutsch (University of Wisconsin-Madison), and Cesar Rodriguez-Saona (Rutgers University) have isolated the key development events and linked them to degree-day (DD) accumulations. These degree-day accumulations can improve treatment timings for cranberry IPM programs in spring and summer.

Sparganothis adult

Sparganothis larva

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The American Cranberry Growers Association 2014 Summer Field Day will be held on Friday August 22, 2014 at the P.E. Marucci Center for Blueberry & Cranberry Research & Extension in Chatsworth, NJ.
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Meeting Agenda

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Sparganothis fruitworm and spotted fireworm are important pests of cranberries; therefore, plant resistance against these insects is a major topic of study.

Field cages in experimental bog

Both insects feed on cranberry uprights and developing fruit during the summer. Dr. Elvira de Lange, a postdoc at the Blueberry and Cranberry Research Center, is especially interested in the resistance factors against these insects that are naturally present in cranberry fruits.
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Last year we observed damage in cranberry bogs by the cranberry toad bug, Phylloscelis atra, in New Jersey. Although we had seen toad bugs in cranberry bogs in the past we had never seen them causing damage to the vines and fruit. Toad bugs are hemipteran insects, similar to blunt-nosed leafhoppers, but belong to the Family Fulgoridae (planthoppers) as opposed to leafhoppers, which belong to the family Cicadellidae.

Life Cycle

Toad bugs 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.

Toad Bug Life Cycle