Peach:

Oriental Fruit Moth (OFM): Third flight adults are present and trap counts are low on most farms, except in isolated areas in northern counties. The timing for 3^rd generation treatments is done in southern counties, but ongoing in northern counties. Please see table below for timing:

OFM 3rd Generation Timing
		Insecticide Type
County/Region	Degree Days by 8/2 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	2628	1st – past 2nd – past	1st – past 2nd – past	1st – past 2nd – past
Hunterdon – Northern Biofix May1	2302	1st – past 2nd – 8/7-8/8	1st – past 2nd – 8/5-8/7	1st – past 2nd – 8/4-8/6

 

Brown Marmorated Stink Bug (BMSB): Trap counts and activity are about the same as during the previous week. The highest counts are in Hunterdon County with 1 farm having a total count of 7 BMSB/trap (2 adults and 5 nymphs). There is no trap or treatment threshold in peaches. Growers with positive counts should be on a BMSB protective schedule or using border sprays every 7 days.

Brown Marmorated Stink Bug Trap Counts – Southern Counties
Week Ending	Average of Adults	Average of Nymphs	Max of Adults	Max of Nymphs
7/7	1.5	0.5	5	1
7/14	1.25	0.0	4	0
7/21	0.67	0.0	2	0
7/28	0.0	0.0	0	0

 

Apple (and Pear):

Codling Moth (CM): Trap counts have increased over the past week. Counts on some farms in northern counties exceed 30 males per trap. Trap counts in southern orchards are also above the 5 male per trap threshold. 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, see dates below. This is the time of year when generations can over lap, making timing very difficult. Make sure to rotate insecticides and treat on a 7 day schedule if insect pressure is high, and/or if rains weather off previous applications.

 

		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 8/2	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	2038	8/8-10	8/13-14	8/8-10	8/13-14	8/8-10		8/13-14
Northern	May 9	1708	Continue Treatments for 2nd gen. if trap counts above 5		Continue Treatments for 2nd gen. if traps counts above 5		Continue Treatments for 2nd gen. if traps counts above 5	Continue Treatments for 2nd gen. if traps counts above 5

 

Grape:

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 previous newsletters for treatments. A provisional treatment threshold from the University of Kentucky is to treat if at least 5% of the vines are infested with GRB. Unfortunately this takes most of the season to measure, since pupal cases from emerging adults have to be counted on marked vines every week, starting in late June. In our counts this year, we see very few pupal cases, or signs from emerging adults. Trap counts are presented below, just to show when adults emerge, but this is likely more of a record from emergence in the surrounding woodlands and wild grape.

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
7/28	5	2

 

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	OFM-A	DWB	OFM-P	TABM-P	LPTB	PTB	BMSB
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	3
7/14	3	1	3	38	109	1	0	3	4	1
7/21	8	1	6	32		3	0	3	4	1
7/28	5	1	6	12	116	2	0	1	13	0

 

Tree Fruit Trap Counts – Northern Counties

Weekending	STLM	TABM-A	CM	OFM-A	DWB	OBLR	OFM-P	TABM-P	LPTB	PTB	BMSB
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
7/28	51	0.9	5.6	1.3	2.2	0	3.2	1.6	3.3	1	3.1

 

Blueberry

Spotted Wing Drosophila (SWD): This is still the insect of concern on Elliott and other late varieties, where 7 day schedules still have to be maintained, especially under high populations. Last week we showed how the population spread over the season as measured by the percent of positive trap captures. As this happens, the population is also increasing in density as measured by the number of flies per trap. In Atlantic County our average trap count was 15.2 with a high of 75. In Burlington County trap counts have decreased slightly our average trap count was 8.4 per trap with a high of 39.

Blueberry Maggot (BBM): This week trap counts have increased in both counties. In Atlantic County average trap count was of 0.13 with a high of 6 BBM. In Burlington County average trap count was 0.49 with a high of 19. BBM populations often increase later in the season, but averages are often skewed by the higher populations emerging in areas no longer receiving insecticides for SWD. If growers are treating Elliott and BBM counts are over 1 per trap, be aware that while Delegate may be a great choice for SWD control, it is weaker against high populations of blueberry maggot.

Oriental Beetle (OB): This week’s traps have decreased again. The Atlantic maximum per trap was 500, and the Burlington maximum was 6075 per trap. Any treatments applied during August or later are a waste of money.

Sharpnosed Leafhopper (SNLH): This week trap counts have slightly increased in both counties. While we expect an increase during the late season, this is only a slight variation and does not qualify for the start of the second generation. This is still several weeks away.

Summary of insect counts seen during the week of July 23^rd – July 27^th    

	Leafroller % Inj. Shoots	Aphids % Inf. Shoots	CBFW % Inf. Fruit	Leafrollers % Fruit injury	PC % Fruit Injury	Scale % Fruit Injury
Average	0.244	5.7	0.004	0.033	0	0.024
High	10	20	0.1	0.7	0	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
7/28	0	0	96.43	15.21	0.125	0.02	0.29

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
7/28	0	0	485.5	8.35	0.49	0.07	0.67