Peach:

Oriental Fruit Moth (OFM): Third flight adults are present in southern counties and just starting to emerge in northern counties. Egg laying has started in southern counties and the first treatments are due now. Please see table below for timing:

Brown Marmorated Stink Bug (BMSB): Activity is starting to pick up for both adults and nymph captures in southern and northern orchards. One orchard in Hunterdon County had a trap count with 3 adults and 28 nymphs. With this kind of population pressure, growers will need to apply full block sprays with BMSB effective materials. If stretching the spray interval, then the outer border rows should be treated every 7 days.

Thrips: Thrips activity has increased over the past week. This is not unusual for this time of year, or for the prolonged hot dry conditions. Thrips can be seen in beating tray samples in a number of peach orchards. Damage will appear as stippling and light rusty areas on the fruit. Delegate is the product of choice, but Lannate can also be effective. Delegate has a 1 day PHI for both peach and nectarine. Lannate SP has a 1 day PHI for nectarine and a 4 day PHI for Peach.

European Red Mites: Activity is increasing on both peaches and apples. In peaches your miticide options include Acramite, Apollo, Envidor, Gladiator, Minecto Pro, Nexter, Onager, Portal, and Zeal. Remember that repeated use of pyrethroids and Lannate can contribute to increased mite populations by virtue of killing mite predators. Gladiator is listed as an insecticide/miticide because it is a premix of zeta-cypermethrin (a pyrethroid) and avermectin. Avermectin and abamectin materials are usually recommended only for early season use, since their effectiveness is diminished when it gets this late in the season. Therefore, this material would not be one of the first choices. Onager is a growth inhibitor and is most effective on eggs and young motile forms, and therefore should be used on lower and younger populations. Apollo and Savey are also growth inhibitors and are reserved for eggs and young motile forms, so should be used on younger populations. Minecto Pro is a premix of Cyantraniliprole (Exirel) plus abamectin, so works best on early season and young populations. Zeal is a growth inhibitor, and also works best on eggs and younger stages, and is usually reserved for early season and young populations. Envidor has a different mode of action (IRAC 23) and usually works best on young populations, but with double applications it can work well on established populations. Nexter and Portal are both IRAC 21 materials, and work well on mid season established populations. Acramite (IRAC 25) works well on established populations. Kanemite and Nealta are labeled on pome fruit but not on peaches. They are both meant for mid season use on established populations. Be aware that some of these materials have long PHIs, especially the materials that are meant to be used on young populations:

Miticide PHIs for Stone Fruit and Pome Fruit

Apple (and Pear):

Codling Moth (CM): Trap counts are low overall. Growers should try to time treatments as outlined below.

Woolly Apple Aphids (WAA): Populations are starting to be seen in northern NJ orchards. If using a neonicotinoid, make sure to add a spreader/penetrant with the insecticide. Do not plan on good control with Movento at this time of year, since the leaves are too thick and tough for the insecticide to be properly absorbed and translocated. If you can still use Diazinon (max. of 2 foliar applications allowed per year), it will probably give you the best control.

Grape:

Grape Berry Moth (GBM): The timing for 3^rd generation GBM treatments is approaching. Growers in southern counties, especially around Hammonton and Gloucester County, should plan on treatments on or about July 22-24. This should coincide with the start of egg laying for the 3^rd brood.

Grape Root Borer (GRB): Adults have been emerging for the past 3 weeks. However, pupal cases from populations within cultivated vineyards show that these populations have only just started to emerge. Growers who are concerned about GRB populations can plan on a Lorsban treatment any time during the next couple of weeks.

Scouting Calendar Tree Fruit Southern Counties

The following table is intended as an aid for orchard scouting. It should not be used to time pesticide applications. Median dates for pest events and crop phenology are displayed. These dates are compiled from observations made since 1995 in Gloucester County. Events in northern New Jersey should occur 7-10 days later.

Tree Fruit Trap Counts – Southern Counties

Tree Fruit Trap Counts – Northern Counties

Blueberry:

Spotted Wing Drosophila (SWD): Trap counts have increased from last week. In Atlantic County our average trap count was 8.2 with a high of 37. In Burlington County our average trap count was 26.5 per trap with a high of 86. These are males only, and illustrate the high populations that have to be dealt with at this time of year. Fruit sampling shows “0” infestation so far.

Putnam Scale: Crawlers from the 1^st generation are still present. Any growers with Putnam Scale populations in harvested ‘Duke’ fields may want to make use of this closing window and treat the first generation with Esteem or Diazinon. Our average count this past week was 0.043 infested fruit per bush, with a high of 2.1. Scale traps average 1 crawler per trap with a high of 3 in Atlantic County, and an average of 0.5 with a high of 1 in Burlington County. These are crawlers caught on double sided tape, wrapped around black electrical tape on an infested branch.

Oriental Beetle (OB): Emergence has been very high over the last 2 weeks. High pressure areas saw a decrease to 8100 beetles per trap in Atlantic County and 10,125 per trap in Burlington County. Although numbers will continue to decrease over the next several weeks, this illustrates the extremely high pest pressure we have had for 2 years in a row. If left untreated (either by insecticide or mating disruption), these numbers will lead to dead plants.

Aphids: Aphid numbers have decreased over the past week, with an average of 5.4% of shoots infested, and a high of 36% infested. Colony size averages 1 to 5 aphids per shoot. This means for all practical purposes aphids are no longer an issue as wood hardens off and leaves mature.

Blueberry Maggot (BBM): Overall BBM populations are extremely low, probably due to the repeated insecticides used for SWD control. The Atlantic County average trap count was 0.01 per trap with a high of 1, and ‘0’ per trap in Burlington County.

Sharpnosed Leafhopper (SNLH): SNLH captures have increased in Atlantic County but decreased in Burlington County. In Atlantic County our maximum trap count was 10, but only 1 per trap in Burlington County. Remember that unlike Blueberry Maggot, which is well controlled by most of the SWD sprays, SNLH is not well controlled by most of the SWD sprays. This is a sucking insect for which the neonicotinoids (Assail, Actara and Admire) work the best, along with Diazinon and Imidan.

Leps and Leafrollers: The levels being seen in commercial fields are very low and not an issue. Some increase in activity is being seen innon-sprayed and organic fields.

Anthracnose: We are still observing Anthracnose in Dukes as well as in Bluecrop. Our overall average of infested fruit per sample was 0.42% with a high of 5.5%. This as likely higher than in most years, and tells the story from a wet spring.

 Table 1: Summery of insect counts seen during the week of July 1^st – July 7^th    

Blueberry Trap Captures – Atlantic County

Blueberry Trap Captures – Burlington County