Peach:

Stink Bugs Apples and Peaches: BMSB populations are becoming quite high in several northern locations. These populations have the potential to do serious damage to apples where populations are high. Growers with high BMSB populations should consider weekly insecticide applications and/or supplemental border applications with BMSB effective insecticides. [Read more…]

Peach:

Stink Bugs Apples and Peaches: BMSB populations are generally low and little changed since last week. However, hatching egg masses are present statewide. Therefore populations can increase in the near future. As the peach season comes to a close, BMSB has the potential to be more of a problem in apples. [Read more…]

Grapes:

Spotted Wing Drosophila (SWD): The spotted wing drosophila is an invasive fruit fly which can infest sound ripe thin-skinned fruit. The SWD female has a saw-like ovipositor which she uses to literally saw through healthy skin and deposit her eggs, which develop into small maggots. At this time of year each generation takes slightly over 1 week to complete. Each female can lay about 300 eggs over her lifetime, and given the time of year it is, we will probably see 3-5 more generations by the time grapes are harvested. Over the past several years we have monitored SWD in vineyards during August through September. A well-known link exists between high populations of native fruit flies and the prevalence of late season sour rot in grapes. What we don’t know is how the prevalence of SWD might be able to aggravate or help increase the late season populations of native fruit flies, or if the total fruit fly complex (native and invasives) is higher because of the presence of SWD. [Read more…]

Peach:

Stink Bugs Apples and Peaches: Brown Marmorated Stink Bug (BMSB) has been steadily increasing in isolated locations. The highest levels seen are on 2 farms in Gloucester County at 4 per trap and at 2 farms in Morris County at 16 and 18 per trap. The Morris County traps are adjacent to apples, and represent high levels of BMSB. Most, but not all of the pyrethroid  and pyrethroid premixes have good activity for BMSB. See the 2020 NJ Tree Fruit Production Guide for a list of effective materials. Where growers are using OFM mating disruption in peaches, then weekly border sprays for BMSB will help. In apples a 7 day program may be needed as trap captures increase. [Read more…]

Peach:

Stink Bugs Apples and Peaches: Brown Marmorated Stink Bug (BMSB) increasing in spotty locations. BMSB has many alternate hosts, and orchard populations always seem to be ‘local’. In some cases BMSB counts are up to 7-10 per trap in Gloucester County and 19 per trap in Morris County. Most of our traps in northern counties have been placed near apples, and these types of populations can be very problematic.  Most, but not all of the pyrethroid  and pyrethroid premixes have good activity for BMSB. See the 2020 NJ Tree Fruit Production Guide for a list of effective materials. Where growers are using OFM mating disruption in peaches, then weekly border sprays for BMSB will help. In apples a 7 day program may be needed as trap captures increase.

Oriental Fruit Moth (OFM): We are at the treatment timing for the third generation, but populations are so low that most growers can either stretch their insecticide timings or target other pests such as BMSB if stinkbugs are present.

OFM 3rd Generation Degree Day (DD) Timing
			Insecticide Type
County/Region	Biofix	DD by 7/21 base 45	Conventional 2100-2200, 2450-2500	Diamide 2025-2150, 2375-2450
Gloucester –Southern	4/3	2207	1st – 7/19-21 2nd – 7/30-8/1	1st – 7/17-19 2nd – 7/28-30
Hunterdon – Northern	4/9	1896	1st – 7/27-30 2nd – too far out	1st – 7/25-27 2nd – too far out

 

Apple:

Spotted Lanternfly (SLF): SLF nymphs are present in several orchards in northern Hunterdon and Warren Counties, but not yet seen directly on the trees; rather in sticky traps placed for BMSB. There are no treatment thresholds for either nymphs or adults on peaches or apples. Any insecticides used for BMSB should also kill SLF nymphs and adults, although it is unknown at this point, if these are going to be problematic in apples. High populations of adults just prior to harvest, may secrete enough honeydew to cause a sooty mold on fair to light skinned varieties.

Codling Moth (CM): Trap captures are very low statewide. However, control of the first generation has been problematic, with infested fruit present in a number of orchards. Growers should pay close attention to their CM trap captures. When male moths start to be captured, and especially when over 5 moths per trap, then insecticides need to be applied.  We expect to see the second generation flight very soon.

Rots : Various rots, mostly bitter rot are appearing in a number of orchards. Special attention should be given to susceptible varieties like Honeycrisp and Empire where bitterroot has been a problem in previous years. Bitter rot infections will continue during wetting periods for the rest of the summer.  The QoIl premixes Merivon and Pristine are good rot materials with Merivon being the better of the two. Luna Sensation and Luna Tranquility are also rated as effective. Alternate with a Captan/Prophyt mix or Captan/Topsin. Topsin has some efficacy for white and black rots but is not effective against bitter rot.

Grapes:

Disease control has been very good so far in the vineyards we are scouting. We have seen some sunburn which can be confused with diseases. Low levels of downy mildew have been noted. In vineyards with Phomopsis present on leaves some fruit rot is appearing. Fruit symptoms are hard brown berries that eventually develop black fruiting bodies on the skin.

Grape Berry Moth: The next timing for GBM will be on or about 7/28 if using Altacor or Intrepid in southern counties. Growers using other insecticides can wait a few days longer.

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	2020 Observed Date
Bud Swell (Redhaven)	March 23 +/- 15 Days	March 9
1/4″ Green Tip Red Delicious	March 31 +/- 13 Days	March 18
Pink Peach (Redhaven)	April 4 +/- 15 Days	March 18
Tight Cluster Red Delicious	April 9 +/- 13 Days	March 29
Oriental Fruit Moth Biofix	April 9 +/- 13 Days	April 3
Full Bloom Peach (Redhaven)	April 9 +/- 14 Days	March 29
Pink Apple (Red Delicious)	April 14 +/- 12 Days	March 12
Codling Moth Biofix	April 27 +/- 13 Days	May 4
Full Bloom Apple (Red Delicious)	April 22 +/- 11 Days	April 25
Petal Fall (Redhaven)	April 22 +/- 10 Days	April 14
Petal Fall (Red Delicious)	April 27 +/- 14 Days	May 4
Shuck Split (Redhaven)	April 30+/- 11 Days	May 1
Tufted Apple Bud Moth Biofix	May 4 +/- 10 Days	May 6
Pit Hardening Peach	June 16 +/- 8 Days	June 16

 

Tree  Fruit Trap Counts – Southern Counties

Week ending	STLM	TABM-A	CM	BMSB	OFM-A	DWB	OFM-P	TABM-P	LPTB	PTB
4/11	1				7		0
4/18	0	0	0		36		2
4/25	1	0	0		12		0	0
5/2	1	0	0		24		1	0	0
5/9	2	1	0		26		2	1	12
5/16	7	4	0		0	0	1	0	2
5/23	2	5	1		1	0	0	6	3
5/30	0	3	0		0	3	0	4	3
6/6	2	7	0		0	14	0	9	13
6/13	0	5	0		0	12	0	6	2	0
6/20	0	3	0		0	12	0	2	0	0
6/27	1	0	0		0	1	0	0	1	2
7/4	1	0	0		0	1	0	0	0	2
7/11	0	0	0	1	0	0	0	0	0	0
7/18	0	0	0	2	0	2	0	0	0	1

 

Tree  Fruit Trap Counts – Northern Counties

Weekending	STLM	TABM-A	CM	BMSB	OFM-A	DWB	OBLR	OFM-P	TABM-P	LPTB	PTB
4/11					0			0.7
4/18	0		0		0.5			1.0
4/25	2		0		0.7			0.7
5/2	5		0		1.8			1.2
5/9	5	0.2	0.3		36.7			10.1	0
5/16	17	0.2	0.4		19.2	0		2.7	1	1.8	0
5/23	18	5.7	2.1		36	1		6.3	10.3	1.5	0
5/30	5	7.2	1.9		57	1		2.6	6.7	9.1	0
6/6	4	15.8	4.1		25.8	0		4.6	18	13	0.3
6/13	15	17.4	4.3		8	1.3	9.5	3.4	20.6	21.8	0
6/20	16	33.8	4.8		9.8	0	9	1.2	34.1	8.3	0
6/27	20	10.9	1.6	1.2	9.8	0.2	0.5	1.5	12.7	5.8	0.3
7/4	18	5.8	0.7	2.5	9.4	0	0	1.5	9.3	3.8	2.5
7/11	14	1.7	0.3	1.9	14.3	0	0	2.4	4.3	5.1	1.5
7/18	11	0.5	1.5	2.0	3.4	0.5	1	2.5	1.5	1.4	3.8

 

Blueberry:

Tailing Down…But Spotted Wing Drosophila (SWD) is still the main pest of concern. Bluecrop is being machine picked and Elliott has started full swing. Late season varieties still must be protected since SWD continues to build higher populations.

Aphids: Aphid populations have decreased to an average of 2.5% of terminals infested with a high of 25% last week. However with the heat wave, actual numbers as of this writing are even less.  While we originally thought we might need some post-harvest applications to control this pest, the recent heat is cooking them in the fields. The combination of aphids not being able to take the heat, and the plant tissue starting to harden off will take care of this pest for the remainder of the season.

Putnam Scale: Scale infested fruit is very low at .02% infested fruit. Growers who have had any of this first generation damage should be prepared to treat those fields when second generation crawlers become active in 2-3 weeks.

By the Numbers:

% Injured Fruit
Week Ending	% LEPS Injured Fruit		% PC Injury Fruit		% Scale		% CBFW
	Avg	Max	Avg	Max	Avg	Max	Avg	Max
5/11	0.05	0.1	0.2	0.3
5/18	0.06	0.8	0.13	1.4
5/25	0.122	1.1	0.43	3.8
5/30	0.17	1.4	0.70	5.6
6/6	0.122	1.1	0.43	3.8
6/13	0.01	0.4	0.001	0.4	0.005	0.1
6/19	0.003	0.2	0	0	0.02	0.5
6/27	0.001	0.3	0.001	0.2	0.03	0.6	0.005	0.1
7/4	0.0	0.0	0.0	0.0	0.03	0.5	0.0005	0.1
7/11	0.005	0.1	0.0	0.0	0.02	0.5	0.0	0.0
7/18	0	0	0	0	0.02	0.4	0	0

 

Trap Counts
Week Ending	CBFW- AC		CBFW-BC		SWD- AC		SWD- BC		OB-BC		OB-AC
	Avg	Max	Avg	Max	Avg	Max	Avg	Max	Avg	Max	Avg	Max
5/11	0.1	1	0	0
5/18	0	0	0	0
5/25	0.1	1	0.25	1	0.8	7	0	0
5/30	0	0	0.25	1	.75	5	.55	1
6/6	5.5	34	0.75	3	2	8	2.1	5
6/13	5.6	22	3.5	8	4	14	7.7	20	3.2	11	18	340
6/19	7.2	48	6.5	18	4.64	30	4.9	16	71.75	675	21.4	68
6/27	0	0	3.5	8	2.8	12	4.3	25	1834	13750	462	2025
7/4	0.22	1	1	3	4.17	16	11.3	46	2421	8775	976	5062
7/11	0.11	1	0.25	1	5.8	27	6.6	22	1093	5000	1997	6075
7/18	0.11	1	0.5	2	5.3	19	4.6	14	769	5000	1575	6750
Week Ending	SNLH – AC		SNLH-BC		BBM-AC		BBM-BC
	Avg	Max	Avg	Max	Avg	Max	Avg	Max	Avg	Max	Avg	Max
6/27	0.14	3	0.8	4	0	0	0	0
7/4	0.08	1	0.8	5	0.009	1	0	0
7/11	0.12	1	1.82	6	0	0	0	0
7/18	0.11	2	1.16	5	0	0	0	0
Key: PC=plum curculio, Scale=Putnam scale, CBFW=cranberry fruitworm, SWD=spotted wing drosophila, OB=oriental beetle, SNLH-sharpnosed leafhopper, BBM=blueberry maggot, BC=Burlington County, AC=Atlantic County