Peach:

Oriental Fruit Moth (OFM): Third flight adults are present in southern counties and starting to emerge in northern counties. The timing for 3^rd generation treatments is now statewide. Treatments should be finishing up in southern counties and just starting in northern counties.

Please see table below for timing:

OFM 3rd Generation Timing
		Insecticide Type
County/Region	Degree Days by 7/27 base 45	Conventional Target – 2100-2200, 2450-2500	Intrepid / IGRs Target -2050-2100, 2400-2450	Diamides (Altacor, Exirel Target – 2025-2150, 2375-2450
Gloucester – Southern Biofix-4/27	2443	1st – past 2nd – 7/28-7/30	1st – past 2nd – 7/27-7/29	1st – past 2nd – 7/26-7/28
Hunterdon – Northern Biofix May1	2131	1st – 7/27-7/29 2nd – too far off	1st – 7/25-7/26 2nd – too far off	1st – 7/24-7/27 2nd – too far off

 

Brown Marmorated Stink Bug (BMSB): Trap counts and activity are about the same as during the previous week. One orchard in Hunterdon County had a trap count with 6 adults and 13 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.

European Red Mites: Activity has taken a rest due to the prolonged rains, although a few sites in northern counties have 5 or more mites per leaf. Given the wet weather, populations should slow down. If needed, see last week’s newsletter for a miticide summary. 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

Material and IRAC Group	PHI Stone Fruit	PHI Pome Fruit
Apollo   10A	21	45 apple, 21 pear
Savey / Onager   10A	28	28
Minecto Pro   28,6	21	28
Nexter   21	7	25 apple, 7 pear
Portal   21	7	14
Envidor   23	7	7
Zeal   10B	7	14
Acramite   UN	3	7
Kanamite   20B	Not labeled	14
Nealta 25	Not labeled	7

 

Apple (and Pear):

Codling Moth (CM): Trap counts have increased over the past week, mostly in southern counties. Treatments for the second generation in southern counties should have been applied last week, and now in northern counties. If trap counts still exceed 5 males per trap then additional treatments are needed. A third generation will need to be treated by early to mid August, depending on where you are in the state, and the population pressure on your farm.

 

		Codling Moth Degree Day Timing – Model Predictions 3rd Generation in Southern Counties and 2nd Generation in Northern Counties
			Application and Insecticide Type
County Area	Biofix	DD by 7/27	Rimon: 1150-1200 DD + 14-17 days later, or 1450-1500 DD 3rd Gen. Target at 2200		Intrepid and Diamides – Altacor, Exirel, Voliam mixes: 1200-1250 DD + 1550-1600 (14-21 days later) 3rd Gen. Start Target at 2200		Cyd-X, Madex, Carpovirusine 1250 DD + every 5-6 days during brood hatch (later if first spray is an IGR) 3rd Gen. Start Target at 2200	Standard Insecticides – Delegate, Avaunt, OP’s, carbamates, pyrethroids 1250-1300 DD + 1600-1650 DD 3rd Gen. Start Target at 2300
DD			2200	2300	2200	2300	2200		2300
Southern	May 5	1883	Between sprays	Between sprays	8/8-10	8/12-14	8/8-10		8/12-14
Northern	May 9	1567	Treat for 2nd gen.		Treat for 2nd gen.		Treat for 2nd gen.	1600 = 7/28-29

 

Woolly Apple Aphids (WAA): Additional farms were seen in northern counties with small WAA colonies. WAA is now widespread in a number of apple plantings. This insect needs to be treated now if it is present, since waiting will only lead to larger colonies in the face of repeated pyrethroid use, mostly for BMSB. 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 should be July 26-28 in southern counties for Intrepid and Altacor use, and about July 30 to August 1 if using pyrethroids or Imidan.

Grape Root Borer (GRB): Adults have been emerging for the past several weeks. Populations are very light and very few pupal cases are being found in vineyards from emerging adults. See last week’s newsletter for treatments. However, this does not appear to be a significant pest in monitored vineyards.

Grape Insect Trap Counts: 8 Grape blocks in southern counties.
Average # Males for Week Ending	GBM – Grape Berry Moth	GRB – Grape Root Borer
6/2	8	—
6/9	3	—
6/16	3	—
6/23	3	3
6/30	11	0
7/7	11	0
7/14	11	2
7/21	3	1

 

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.

 

Pest Event or Growth Stage	Approximate Date	2018 Observed Date
Bud Swell (Redhaven)	March 23 +/- 15 Days	March 26
1/4″ Green Tip Red Delicious	March 31 +/- 13 Days	April 2
Pink Peach (Redhaven)	April 4 +/- 15 Days	April 10
Tight Cluster Red Delicious	April 9 +/- 13 Days	April 16
Oriental Fruit Moth Biofix	April 9 +/- 13 Days	April 27
Full Bloom Peach (Redhaven)	April 9 +/- 14 Days	April 20
Pink Apple (Red Delicious)	April 14 +/- 12 Days	April 30
Codling Moth Biofix	April 27 +/- 13 Days	May 5
Green Peach Aphid Observed	April 16 +/- 16 Days	May 21
Full Bloom Apple (Red Delicious)	April 22 +/- 11 Days	May 3
Petal Fall (Redhaven)	April 22 +/- 10 Days	May 1
Petal Fall (Red Delicious)	April 27 +/- 14 Days	May 7
Shuck Split (Redhaven)	April 30+/- 11 Days	May 7
First PC Oviposition Scars Observed	May 3 +/- 18 Days	May 14
Tufted Apple Bud Moth Biofix	May 4 +/- 10 Days	May 12
San Jose Scale Crawlers	June 2 +/- 8 Days	June 1
Pit Hardening Peach	June 16 +/- 8 Days	June 12

 

Tree Fruit Trap Counts – Southern Counties

Weekending	STLM	TABM-A	CM	AM	OFM-A	DWB	OFM-P	TABM-P	LPTB	PTB
5/12	2	2	10		117		32
5/19	8	5	10		53		3		7
5/26	0	8	28		53		3	6	45
6/2	2	11	1		19		0	10	27
6/9	4	10	9		39	42	4	19	55
6/16	11	11	8		14	181	5	10	4	0
6/23	17	4	5		9	98	2	8	27	11
6/30	10	3	3		12	173	1	1	8	20
7/7	19	1	4		68	94	0	2	19	2
7/14	3	1	3		38	109	1	0	3	4
7/21	8	1	6		32		3	0	3	4

 

Tree Fruit Trap Counts – Northern Counties

Weekending	STLM	TABM-A	CM	AM	OFM-A	DWB	OBLR	OFM-P	TABM-P	LPTB	PTB
4/7	0
4/14	4
4/21	11				0			0
4/28	15		0		0			0
5/5	17	0	0		0			1
5/12	30	0	0.2		7			16.9	0	0
5/19	26	0.3	1.8		3.7	0	0	4.5	0.4	1.1	0
5/26	43	2.2	2.5		4.6	0	0	6.1	1.4	11.8	2
6/2	4	7.2	2.4		4	0.7	0	5.1	11.3	14.9	0
6/9	10	20.8	5		3.3	1.2	12	6.6	22.2	18.5	0.8
6/16	13	42.3	4.6		7.4	0.3	31	2.9	96	12.7	0.3
6/23	54	42.8	5.8		3	0.6	17	4.7	60.5	9.3	0.4
6/30	45	29.3	2.5		2.2	1.3	12	3.2	29.8	7.8	4.5
7/7	61	13.7	1.5		2.3	1	7	2.9	10.3	8.5	2.7
7/14	20	5.9	0.9		2.8	2.4	8	2.7	4.7	5.8	4.5
7/21	40	1.2	2.7		2.9	1.9	0	5.9	0.8	6.3	4.2

 

Blueberry

Spotted Wing Drosophila (SWD): This is still the insect of concern. Trap counts have increased since last week. In Atlantic County our average trap count was 10.42 with a high of 55. In Burlington County our average trap count was 15.5 per trap with a high of 96. Trap captures have increased each week since the mid June. As the season has progressed, adult flies were first found in just a few sites to now being found on virtually all monitored farms, as seen in the percent of traps with SWD adults. Trap counts are only an indication of relative population pressure, but this does show that as the population increases and becomes more widespread, control becomes more important for the later season harvests.

Blueberry Maggot (BBM): During the past week we had no BBM captures in Burlington County. However we did have an average trap count of 0.1 with a high of 6 BBM in Atlantic County. This is still a pest of concern, but will be controlled by most of the treatments being used for SWD.

Oriental Beetle (OB): This week’s traps have decreased. The Atlantic County maximum per trap was 8,000 and the Burlington maximum was 10,175 per trap. As the weeks progress OB numbers will decrease. We are now past the timing where imidacloprid treatments will be effective. Any treatments applied during August or later are a waste of money.

Putnam Scale: Crawlers can still be found on sticky tape traps, but at very low numbers. We are now between generations. If you had scale-infested fruit, note the fields which were infested and plan on a treatment in a few weeks. The average trap count in Atlantic County was .71 crawlers per trap with a high of 2, and in Burlington County the average was .3 with a high of 1.

Sharpnosed Leafhopper (SNLH): We are also between 1^st and 2^nd generations for this pest. No treatments are needed until we get close to peak activity during the second generation of adults, usually in late September to early October.

Aphids: These are no longer an issue, although Elliott plantings will continue to have higher populations than other varieties. Growers will need to concentrate on SWD for the remainder of the season.

 

Table 1: Summery of insect counts seen during the week of July 16^th – July 20^th    

	Leafroller % Inj. Shoots	Aphids % Inf. Shoots	CBFW % Inf. Fruit	Leafrollers % Fruit injury	PC % Fruit Injury	Scale % Fruit Injury
Average	0.151	4.5	0.003	0.014	0	0.012
High	4	24	0.1	0.4	0	.3

 

Blueberry Trap Captures – Atlantic County

Week Ending	PC	CBFW	OB	SWD	BBM	SNLH	Putnam Scale
5/26	0.43	0.0
6/2	0.43	0.0
6/9	0.09	0.43	5.4
6/16	0	0.015	31.75	0.02	0	0.072
6/23	0.285	0.015	1436	0.176	0.024	0.104
6/30	0.28	0	2583	2.78	0.012	0.1333
7/7	0.428	0.016	3469	3.16	0.09	0.09	24.5
7/14	0.142	0.02	2827	8.235	0.011	0.253	1
7/21	0.142	0	827	10.42	0.101	0	0.714

 

Blueberry Trap Captures – Burlington County

Week Ending	PC	CBFW	OB	SWD	BBM	SNLH	Putnam Scale
5/26	1.67	0.18
6/2	0.67	0.16
6/9	0.0	0.1	0.6
6/16	0	0.5	38.52	0.15	0	0
6/23	0	0	1016	0.5	0	0
6/30	0	0.25	2463	4.63	0	0.5517
7/7	0	0.105	3741	4.8	0.25	0.143	0
7/14	0	0	1980	26.45	0	0.071	0.5
7/21	0	0	1002	15.5	0	0	0.333