Rutgers Cooperative Extension
Bloom has started. 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 the Insect Growth Regulators –IGR- (e.g. Confirm and Intrepid) or Bt products (e.g. DiPel).
From now until August, we recommend monitoring insect populations using pheromone traps. [Read more…]
In 2012 we started a study to compare the efficacy of different trap designs (delta versus wing traps) and colors (white versus red) on Sparganothis fruitworm (SPARG) adult captures. We found that red delta traps (Trécé Pherocon VI) are more effective than white delta traps. White delta traps also catch greater number of honey bees, and it is possible that this saturates the sticky traps. We are continuing this work and testing this hypothesis in 2013. Results from these studies will be presented at future grower meetings.
Experiment set-up to test effect of
trap design and color on
Sparganothis fruitworm captures.
Data show red delta traps to be more effective than white delta traps in catching adult Sparanothis fruitworm.
Below is a list of where to get supplies for IPM programming. I have put together the following list for those of you who wish to purchase supplies. This is not an endorsement of any particular company. Some vendors are manufacturers, and sell direct, while others are only retailers.
Distributors, Dealers, Manufacturers
The first trap capture was seen on June 7 in Burlington County which started the clock for those growers on a calendar based spray program if exporting fruit to Canada. See Fruit IPM report for this week.
Blueberry Maggot Trap
Rutgers Technician Robert Holdcraft
sweeping a cranberry bed.
Altacor is a new insecticide registered in cranberries. A few weeks ago we conducted an experiment to test the efficacy of Altacor® (DuPont) at 4.5 oz/acre against spotted fireworm larvae.
[Read more…]
Tape traps monitored on Tuesday, June 4 showed the start of crawler activity in the Hammonton area.
Maturing blueberries:
Circled areas show freshly settled scales.
Scales feed on plant sap, decreasing plant vigor and fruit yield. Adult scales are protected from insecticide sprays by a waxy covering. These insects are common in older canes when not removed, and located mostly under loose bark. In New Jersey, the Putnam scale has two generations a year. It overwinters as second-instar nymphs under loose bark. Spring activity begins in early February. Eggs from the first generation are laid in late April, and immature “crawlers” typically begin to appear in mid-May. Peak crawler emergences occur in late May and early June (this time of the year). Peak crawler emergences for the second generation occur in early to mid-August.
Growers who had a scale problem last year can treat the first generation crawler stage now with Esteem (35W or .86EC, 7 day PHI), or wait until peak crawler emergence and use Diazinon (7 day PHI). Diazinon can only be used once in-season, and waiting until peak crawler emergence may put you too close to harvest, at least with early varieties. The second generation can be treated later in early August. Crawlers can be monitored by wrapping black electricians’ tape covered by double-sided sticky tape around canes. Use a hand lens to see crawlers on the sticky tape.
