It’s Here!

Spotted lanternfly was found on Friday August 10 on a commercial Hunterdon County fruit and vegetable farm. The insect was found in a Tree of Heaven being used as a trap tree with a plastic catch basin placed around the base of the tree, and the first 5-6 feet of the trunk sprayed with dinotefuran to kill any insects that land on the tree. The dead insects were supposed to fall into the catch basin. They did not. The find was made by looking up into the foliage and seeing the adult stage. To our knowledge this is the first sighting of this insect on a commercial farm in NJ. Growers should be particularly aware of any possible activity in trees of heaven that border cultivated plantings. These trees are common in poor and disturbed soil. This capture was made from trees on a hillside that line the border of a powerline which runs through the farm. With the amount of spraying that normally goes on in tree fruit, it is not likely that this insect will cause a major problem at this time of the season. However, if these insects are found on trees in close proximity to grapes it can be more problematic. See the July 18 Plant and Pest for an article by Anne Nielsen here https://plant-pest-advisory.rutgers.edu/?s=spotted+lanternfly

The photos taken by Karlton Neidigh and Atanas Atanassov are below:

 

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 8/12 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	2976	1st – past 2nd – past	1st – past 2nd – past	1st – past 2nd – past
Hunterdon – Northern Biofix May1	2619	1st – past 2nd – 8/7-8/8	1st – past 2nd – 8/5-8/6	1st – past 2nd – 8/4-8/6

 

Brown Marmorated Stink Bug (BMSB): BMSB pressure as seen in pheromone traps has increased over the past week, but is still very spotty. The highest counts are in Hunterdon County with 1 farm having over 13 BMSB per trap. 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. Growers are encouraged to use highly effective materials, and follow with Venom or Scorpion up to 3 days preharvest.

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
8/4	1.44	0.00	5	0

 

San Jose Scale: Second generation scale crawlers appeared last week in southern counties. Crawler emergence will continue throughout August. In blocks where scale activity is observed on green fruit or at harvest should receive applications of either Esteem or Centaur either within the preharvest interval listed for the product, or in blocks that are harvested in early August, right after harvest. Belay and Actara also have good scale efficacy against crawlers. Refer to the product label for preharvest intervals and seasonal application limits.

Brown Rot: Brown Rot pressure has increased after the past few weeks of wet weather. Nothing can be done other than to stay diligent with preharvest fungicide applications starting about 3 weeks prior to harvest. Some of the rot problems may be a result of environmental problems such as streaking and “cooked flesh” that resulted from the very hot and dry weather in June.

 

Apple (and Pear):

Codling Moth (CM) and Oriental Fruit Moth (OFM): These two “worms” together can cause problems for apple growers late in the season. The timing for Oriental Fruit Moth in peaches is earlier than in apples. Any treatments applied for codling moth now, will also control oriental fruit moth. Codling Moth trap captures have increased on a number of farms. Trap counts range from 12-43 moths per trap in many North Jersey orchards. The treatment threshold is 5 moths per trap. As you can see from the trap count table, the averages in both North and South Jersey orchards is well above 5 moths per trap. In southern orchards, 3^rd generation treatments are due now. If using Madex, then continue treatments every 5-6 days.

		Codling Moth Degree Day Timing – Model Predictions 3rd Generation Treatments
			Application and Insecticide Type
County Area	Biofix	DD by 8/12	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	2336	8/8-10	8/12-13	8/8-10	8/12-13	8/8-10		8/12-13
Northern	May 9	1975	Continue Treatments for CM if trap counts above 5, Otherwise target 8/21-22 for 3rd generation treatments		Continue Treatments for CM if trap counts above 5, Otherwise target 8/21-22 for 3rd generation treatments		Continue Treatments for CM if trap counts above 5, Otherwise target 8/21-22 for 3rd generation treatments	Continue Treatments for CM if trap counts above 5, Otherwise target 8/25-26th for 3rd generation treatments

 

Grape:

Grape Berry Moth (GBM): Timing for the 4^th generation will be due roughly around August 20-21in southern counties. Growers are advised to consider treatments only if pest pressure is high, especially around the edges of vineyards. GBM pressure along with various drosophila activity can combine to aggravate late season rot pressure.

Grape Root Borer (GRB): So far in our counts this year in 8 vineyards, we have not found any with populations that are high enough to merit treatment. Most of the adult activity seen in the pheromone traps is from mostly wild sources.

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
8/4	1	5

 

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
8/4	10	2	7		19	15	3	1	0	2

 

 

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
8/4	108	1.7	6.9	1.8	0.8	1	1.7	3.5	2.2	5.8	3
8/11	144	1.7	7.5	1	0.5	2	4.6	2	3.1	6.5	7.3

 

Blueberry

Putnam Scale: Second generation crawlers are active. Anybody who had any fruit infested with scale should treat those fields now. The keys to scale control are 1) High Volume sprays, 2) Timing, and 3) the correct material. Use plenty of spray volume for this spray. The two best choices for materials are Esteem and Diazinon. Diazinon can only be once post bloom, and it is still too early for the second generation Sharpnosed Leafhopper treatment. Therefore, if you plan to use Diazinon later for SNLH, then you have to use Esteem now. It’s the better material for this anyway.

Spotted Wing Drosophila (SWD):  Trap counts continue to increase. The highest counts this past week were 50 in Atlantic County and 68 in Burlington County. Treatments are over for most growers, but if you still have any Elliott still on the bushes, then treatments are still required. At the end of July we did get a positive fruit reading in a salt test. Spraying and picking had just stopped in this field.

 

Sharpnosed Leafhopper (SNLH): Trap captures have increased, but this is still too early to define this as the second generation flight. Treatments are still Not suggested at this time.

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	0.96	5.98	0	0.010	0	0.02
High	26	32	0	0.2	0	0.7

 

 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
8/4	0	0.05	68.48	8.7	0.15	0.02	7.71

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
8/4	0	0.1	206.47	11.1	0.38	0.11	0.67