Peach:
Oriental Fruit Moth: First generation timings are updated below. Growers that have utilized mating disruption for OFM can focus on PC; GPA; and catfacing insect pests as described below.
Rutgers Cooperative Extension
Peach:
Oriental Fruit Moth: First generation timings are updated below. Growers that have utilized mating disruption for OFM can focus on PC; GPA; and catfacing insect pests as described below.
If you are unfamiliar with this pest
If you are interested in donating infested plant material or conducting on-farm RHFB research. Please contact twaller@njaes.rutger.edu (856-451-2800 ext.1)
Redheaded Flea Beetle (RHFB) Considerations
Ideally when controlling high-density populations of RHFB, fall applications of long-lasting systemic materials can provide a strong knock-down of larvae populations destined to emerge in the following spring. Establishing a reserve of systemic materials in the soil and root zone late-season or early this season will greatly increase control efforts made later and can reduce the number of overall applications made specifically for RHFB. A two-pronged approach of systemic and contact insecticides can manage active adults and larvae throughout the season. For current season control: systemic insecticide drench or ‘sprench’ (*consider backpack units) near planting / potting-up, or a month prior to adult emergence (now for southern NJ), will provide the reserve of systemic activity required to reduce larvae and adult populations later. Contact material applications should also be considered for adult and larval treatments but must be made at sufficient volumes to guarantee ‘contact’. Contact-only driven spray regimes can provide good results, however the need to protect new growth will be ever present. When choosing materials, also consider the other pests targeted by that compound to maximize the value of your investment. Targeting the larval stage will reduce the number of adults present to lay the next generation of eggs.
Timeline for New Jersey growers and landscape professionals
Please download this RHFB quick-look guide of the information provided below (click here)
Projected GDD50 accumulation as of 4/26/2021 | ||||||
Region | Location | 26-Apr | 1-May | 1-Jun | 1-Jul | Aug. 1st |
Southern | Upper Deerfield (NJ50) | 163 | 231 | 638 | 1315 | 2158 |
Central | Howell / Freehold (NJ10) | 110 | 166 | 514 | 1135 | 1929 |
Northern | High Point (NJ59) | 61 | 99 | 313 | 765 | 1327 |
Forecast: NOAA NCEP Coupled Forecast System model version 2 (CFSv2) forecast system (3.5 months) (USPEST.ORG) |
Redheaded flea beetle – life stage predictions for South, Central, and Northern New Jersey with material considerations | |||||||||
TARGET RANGE | TARGET RANGE | Upper Deerfield (NJ50) | Howell (NJ10) | High Point (NJ59) | |||||
Growth Stage | Gen. | GDD50 LOW | GDD50 HIGH | LOW (DATE) | HIGH (DATE) | LOW (DATE) | HIGH (DATE) | LOW (DATE) | HIGH (DATE) |
Egg hatch – larvae | 1st | 242 | 600 | 2-May | 29-May | 10-May | 6-Jun | 24-May | 21-Jun |
Adults (feeding / laying eggs) | 1st | 517 | 1028 | 24-May | 20-Jun | 1-Jun | 27-Jun | 16-Jun | 14-Jul |
POTENTIAL OVERLAP OF GENERATIONS / STAGES | |||||||||
Egg hatch – larvae | 2nd | 1570 | 1860 | 10-Jul | 21-Jul | 17-Jul | 29-Jul | 11-Aug | 27-Aug |
Adults (feeding / laying eggs) | 2nd | 1878 | 2318 | 22-Jul | 7-Aug | 30-Jul | 16-Aug | 28-Aug | 1-Oct |
Note: Updated 4/26/2021 – Estimated using USPEST.org, 3.5-month CFSv2 based seasonal climate forecast, simple average growing degree-days, min temp: 50F, max temp: 95F. Growing degree-day ranges based on Dr. Kunkel’s work out of the University of Delaware.
IT IS CRITICAL TO ROTATE AS MUCH AS POSSIBLE BETWEEN IRAC GROUPS DUE TO THE NUMBER OF POTENTIAL APPLICATIONS
DISCLAIMER: The label is the law, always refer to it for allowable host crops, use-restrictions, application rates, reapplication intervals, re-entry intervals (REI), and mix compatibility information. Production and pesticide information on this site are for private/commercial pesticide applicators and landscape professionals only, and are NOT for home gardener use. Provided materials represent examples and do not cover all possible control scenarios. Trade-names listed do not imply endorsement and are used as examples only. Please contact your local agent or chemical sales representative for more information or to discuss additional pest management options.
Boxwood Blight risk model update (4/26 – 5/1)
Boxwood Blight Risk Assessment as of 4/26/2021 | ||||||||
Region | Location | CODE | 26-Apr | 27-Apr | 28-Apr | 29-Apr | 30-Apr | 1-May |
Southern | Upper Deerfield | NJ50 | Very Low | Very Low | Very Low | Very Low | Very Low | Very Low |
Central | Howell / Freehold | NJ10 | Very Low | Very Low | Very Low | Very Low | Low | Very Low |
Northern | High Point | NJ59 | Very Low | Very Low | Very Low | Low | Low | Very Low |
Please check your local boxwood blight risk here (click here) |
Please contact Tim Waller – Cumberland Co. – RCE for more information – twaller@njaes.rutgers.edu – 856-451-2800 ext. 1
Nursery and Landscape Pest Scouting Guide 150-250 GDD50:
Please print or download these resources (click on them):
Remember:
GREAT RESOURCE from Steve Rettke: “Landscape Pest Notes: Some Early Spring Insects/Mites”
Projected GDD50 accumulation as of 4/15/2021 | |||||||
Region | Location | 4/15/21 | 1-Apr | 1-May | 1-Jun | 1-Jul | Aug. 1st |
Southern | Upper Deerfield (NJ50) | 141 | 75 | 230 | 636 | 1314 | 2156 |
Central | Howell / Freehold (NJ10) | 94 | 67 | 165 | 513 | 1135 | 1929 |
Northern | High Point (NJ59) | 50 | 21 | 56 | 268 | 721 | 1327 |
Forecast: NOAA NCEP Coupled Forecast System model version 2 (CFSv2) forecast system (3.5 months) (USPEST.ORG) |
Pest Scouting – Growing Degree-day Ranges | (150-250 GDD50) | |||||
CROP TYPE | Common Name | Scientific Name | GDD Min (50F) | GDD Max (95F) | Reference | Developmental / Target Stage |
Malus, Prunus, many | Eastern tent caterpillar | Malacosoma americanum | 90 | 190 | 2 | Larvae treatment before tents apparent (near 150-GDD50) |
Elm, Service berry | Woolly elm aphid | Eriosoma americana | 121 | 246 | 2 (6) | Control target |
Conifer | Hemlock woolly adelgid | Adelges tsugae | 150 | 150 | RU | Eggs and 10% hatch |
Conifer | Spruce spider mite | Oligonychus ununguis | 150 | 175 | 4 | 1st egg hatch |
Conifer | Spruce needleminer | Endothenia albolineana | 150 | 200 | 4 | 1st larvae active |
Conifer | Balsam gall midge | Paradiplosis tumifex | 150 | 300 | 4 | Adults laying eggs |
Witchhazel, River birch | Spiny witchhazel gall aphid | Hamamelistes spinosus | 171 | – | 6 | Control target |
Birch | Birch leafminer | Fenusa pusilla | 190 | 290 | RU | Larvae (1st generation) |
Conifer | Spruce spider mite | Oligonychus ununguis | 190 | 363 | RU | Immatures/Adults |
Honeylocust | Honeylocust pod gall midge | Dasineura gleditchiae | 192 | 229 | RU | Larvae |
Holly | Holly leafminer | Phytomyza ilicis | 192 | 290 | RU | Egg hatch |
Holly | *Native holly leafminer | Phytomyza ilicicola | 192 | 298 | 2 | Egg hatch |
Rhododendron | Rhododendron borer | Synanthedon rhododendri | 192 | 298 | 2 | Typical treatment window |
Larch | Larch sawfly | Pristophora erichsonii | 192 | 299 | 2 | Typical treatment window |
Andromeda | Andromeda lacebug | Stephanitis takeyai | 192 | 303 | RU | Adults |
Rhododendron | Rhododendron gall midge | Clinodiplosis rhododendri | 192 | 363 | RU | Larvae |
Willows, Cottonwood, Poplar | Imported willow leaf beetle | Plagiodera versicolora | 192 | 448 | RU | Larvae/Adults |
Privet | Privet thrips | Dendrothrips ornatus | 192 | 618 | 2 | Typical treatment window |
Lilac, ash, privet, many | Lilac / Ash Borer | Podosesia syringae | 200 | 299 | RU | Adults – 1st Treatment |
Spruce | Spruce budworm | Choristoneura fumiferana | 200 | 300 | 5 | Larvae |
Elm | Elm leafminer | Fenusa ulmi | 215 | 240 | 5 | Adult emergence |
Wild and cultivated roses | Roseslug sawfly | Endelomyia aethiops | 230 | – | 6 | Egg hatch / early instars |
Deciduous, many | Hawthorn lacebug | Corythucha cydoniae | 239 | 363 | RU | Nymphs/Adults |
Conifer | Arborvitae leafminer | Argyresthia thuiella | 245 | 360 | RU | Larvae Treatments |
Prunus | American plum borer | Euzophera semifuneralis | 245 | 440 | 5 | Adult flight, egg laying |
Boxwood | Boxwood mites | Eurytetranychus buxi | 245 | 600 | RU | All Stages |
Lilac | Lilac leafminer | Caloptilia syringella | 246 | 363 | 5 | Larvae Treatments |
Holly | Holly leafminer | Phytomyza ilicis | 246 | 448 | RU | Larvae Treatment |
Yew | Taxus mealybug | Dysmicoccus wistariae | 246 | 618 | RU | Adults/Crawlers |
Conifer | Pine sawflies (Red-headed) | Neodiprion lecontei | 246 | 1388 | RU | Larvae (1st generation) |
Boxwood | Boxwood leafminer | Monarthropalpusi flavus | 249 | – | 6 | Adult emergence |
Conifer | Eastern spruce gall adelgid | Adelges abietis | 250 | 310 | 5 | egg hatch, galls begin forming (not a control target) |
References | RU | Rutgers Cooperative Extension – IPM Notes | ||||
2 | http://ccetompkins.org/resources/using-growing-degree-days-for-insect-management | |||||
3 | https://extension.psu.edu/ipm-basics-for-christmas-trees#section-2 | |||||
4 | https://www.canr.msu.edu/ipm/agriculture/christmas_trees/gdd_of_conifer_insects | |||||
5 | https://www.agriculture.nh.gov/publications-forms/documents/landscape-pests.pdf | |||||
6 | https://extension.umd.edu/ipm/pest-predictive-calendar-landscapenursery | |||||
7 | https://www.canr.msu.edu/ipm/agriculture/christmas_trees/gdd_of_landscape_insects |
Boxwood Blight risk-model information, considerations, and links:
Boxwood Blight Risk Assessment as of 4/15/2021 | |||||||
Region | Location | CODE | 15-April | 16-April | 17- April | 18-April | 19-April |
Southern | Upper Deerfield | NJ50 | Low | Very Low | Very Low | Very Low | Very Low |
Central | Howell / Freehold | NJ10 | Low | Very Low | Very Low | Very Low | Very Low |
Northern | High Point | NJ59 | Very Low | Very Low | Very Low | Very Low | Very Low |
Please check your local boxwood blight risk at (https://uspest.org/risk/boxwood_app) |
Considerations:
Become a Boxwood Blight Advocate to receive quarterly updates (through the Horticultural Research Institution)
Please print or download the two resources of this post (click on them):
The information provided in the downloads gives early season scouting ranges (in growing degree days, base 50F) for specific insect pests harming conifer and Christmas tree production and maintenance. Additionally, forecasting predictions (GDD50 accumulation) for calendar dates of multiple regions of New Jersey (S,N,C) are provided.
To determine your local growing degree-days, please review this post “Obtaining your local growing degree-day information”
Scouting Ranges:
Projected GDD50 accumulation as of | ||||||
NJ Region | Location | March 1st | April 1st | May 1st | June 1st | July 1st |
Southern | Upper Deerfield (NJ50) | 0 | 24 | 133 | 540 | 1217 |
Central | Howell / Freehold (NJ10) | 0 | 14 | 95 | 443 | 1064 |
Northern | High Point (NJ59) | 0 | 1 | 7 | 220 | 672 |
Forecast: NOAA NCEP Coupled Forecast System model version 2 (CFSv2) forecast system (3.5 months) (USPEST.ORG) |
Early Season Conifer Pest Scouting – Growing Degree-day Ranges | Starting (0-300 GDD50) | ||||
Common Name | Scientific Name | GDD Min (50F) | GDD Max (95F) | Reference | Developmental / Target Stage |
Conifer rust mites | Eriophyidae | 7 | 22 | 4 | Overwintering eggs hatch |
Eastern pine weevil | Pissodes nemorensis | 7 | 58 | RU | Overwintering adults become active / prevent egg laying |
Taxus mealybug | Dysmicoccus wistariae | 7 | 91 | 2 | Spring control of overwintering stage |
Cottony taxus scale | Pulvinaria floccifera | 7 | 91 | 6 | Spring control of overwintering stage |
Elongate hemlock scale | Fiorinia externa | 7 | 120 | 2 | Spring control of overwintering stage |
Spruce spider mite | Oligonychus ununguis | 7 | 121 | RU | Overwintering eggs hatch |
Pales weevil | Hylobius pales | 7 | 121 | RU | Overwintering adults become active / prevent egg laying |
White pine aphid | Cinara strobi | 22 | 91 | RU | Spring control of overwintering stage |
Pine bark adelgid | Pineus strobi | 22 | 58 | 2 | Spring control of overwintering stage |
Spruce bud scale | Physokermes piceae | 22 | 120 | 2 | Spring control of overwintering stage |
Juniper scale | Carulaspis juniperi | 22 | 148 | 2 | Spring control of overwintering stage |
Eastern spruce gall adelgid | Adelges abietis | 25 | 100 | 3 | spring control of overwintering stage |
Northern pine weevil | Pissodes approximatus | 25 | 100 | 4 | 1st adults active |
Zimmerman pine moth | Dioryctria zimmermani | 25 | 100 | 3 | 1st larvae active |
Cooley spruce gall adelgid | Adelges cooleyi | 25 | 120 | 3 | Spring control of overwintering stage |
White pine weevil | Pissodes strobi | 25 | 220 | 4 | 1st adults active |
European pine sawfly | Neodiprion sertifer | 35 | 145 | 1 | Spring control of overwintering stage |
Fletcher scale | Parthenolecanium fletcheri | 35 | 148 | 2 | Spring control of overwintering stage |
European pine shoot moth / borer | Rhyacionia buoiana | 50 | 220 | 4 | 1st larvae active |
Pine tortoise scale | Toumeyela parvicornis | 58 | 148 | 2 | Cralwer activity |
Pine bark adelgid | Pineus strobi | 58 | 618 | 2 | Spring control of overwintering stage |
Balsam twig aphid | Mindarus abietinus | 60 | 100 | 4 | Egg hatch |
Eastern pine shoot borer | Eucosma gloriola | 75 | 200 | 4 | 1st adults active |
Cooley spruce gall adelgid | Adelges cooleyi | 90 | 180 | 4 | 1st adults active – Douglas fir |
Balsam twig aphid | Mindarus abietinus | 100 | 150 | 4 | Stem mothers present (control target) |
Pine engraver (Ips bark beetle) | Ips spp. | 100 | 150 | 4 | 1st adults active |
European pine sawfly | Neodiprion sertifer | 100 | 195 | 4 | 1st larvae active |
Larch casebearer | Coleophora laricella | 120 | 150 | 4 | Egg hatch |
Nantucket pine tip moth | Rhyacionia frustrana | 121 | 448 | RU | 1st generation egg hatch |
Gypsy moth | Lymantria dispar | 145 | 200 | 4 | Egg hatch, 1st larvae |
Spruce spider mite | Oligonychus ununguis | 150 | 175 | 4 | 1st egg hatch |
Spruce needleminer | Endothenia albolineana | 150 | 200 | 4 | 1st larvae active |
Balsam gall midge | Paradiplosis tumifex | 150 | 300 | 4 | Adults laying eggs |
Spruce budworm | Choristoneura fumiferana | 200 | 300 | 4 | 1st larvae active |
Cooley spruce gall adelgid | Adelges cooleyi | 200 | 310 | 4 | 1st galls visible – Spruce |
Arborvitae leafminer | Argyresthia thuiella | 245 | 360 | 4 | Larvae in mines; 1st generation |
Eastern spruce gall adelgid | Adelges abietis | 250 | 310 | 4 | Egg hatch, galls begin forming |
Pine needle scale | Chionaspis pinifoliae | 298 | 448 | 4 | 1st generation egg hatch |
Pine root collar weevil | Hylobius radicis | 300 | 350 | 4 | 1st adults active |
Turpentine beetle | Dendroctonus terebrans | 300 | 350 | 4 | Parent beetles colonizing brood material |
References | RU | Rutgers Cooperative Extension – IPM Notes | |||
2 | http://ccetompkins.org/resources/using-growing-degree-days-for-insect-management | ||||
3 | https://www.canr.msu.edu/ipm/agriculture/christmas_trees/gdd_of_conifer_insects | ||||
4 | https://extension.psu.edu/ipm-basics-for-christmas-trees#section-2 | ||||
5 | https://www.agriculture.nh.gov/publications-forms/documents/landscape-pests.pdf | ||||
6 | https://extension.umd.edu/ipm/pest-predictive-calendar-landscapenursery |
(Please note: we will be providing pest GDD ranges regularly throughout the season for our green industries)
Important notes about growing degree-day models:
Why use local growing degree-day models?
Important notes about growing degree-day models:
Two examples of degree-day calculators with instructions:
USPEST.org (home page) delivers a wide variety of degree-day, climatic, and risk-based modeling tools for various applications in agriculture. This resource also has a number of important disease predictive tools such as the Boxwood Blight Risk Model. The USPEST growing degree-day application allows for day-to-day monitoring as well as historical and predictive data. The following directions seem complicated but after a few attempts, it is easy to become proficient with this incredibly powerful modeling system. Remember BASE TEMP MUST = 50°F (for all models to be considered a ‘growing’ degree-day model)
Table 1. Uspest.org – Degree-day / Phenology Model – quick reference guide | ||||
Step # | Tab | Sub-category | Instructions | Notes |
– | Intro | – | Educational | Detailed instructions |
1 | Station | Search bar | Enter – area code, town, or weather station code | example zip code: 08302 |
Drop-down menu | Select – location of interest | example: NJ50 = Upper Deerfield | ||
2 | Model | Model Category | Select – all models | – |
Model | Select – degree-day calculator (general purpose) | Many interesting degree-day calculators are available | ||
Calculation Method | Select – Simple average/growing dds | Average air temperature over 24 hours minus lower (base) temperature threshold | ||
Lower | Input – 50 ℉ | 50℉ : lower threshold must be used for ‘growing’ degree-day predictions/charts | ||
Upper | Input – 95 ℉ | 95℉ : often used as upper temperature threshold value | ||
Dates | Select – date range | Can be current, past, or future date ranges | ||
Options | Optional* – modify forecast type | Default forecasting model: NMME (North American Multi-Model Ensemble) | ||
3 | Output | Model Output | Select – show full table (daily GDD accumulation) | ‘DDs cumu’ = accumulated degree-days from selected start date |
4 | Graph | Graph | No action required | Graphical display of current year, forecasts, and previous years based on ‘Dates’ selected |
Link: | https://uspest.org/dd/model_app |
NEWA (homepage). Cornell University in cooperation with twenty-eight other groups and universities (including Rutgers) coordinate NEWA. NEWA contains a wide variety of robust degree-day models, climatic information and maps, and risk-based modeling tools for various applications in multitude crop systems. This resource also has a number of very useful, disease specific, predictive / monitoring / management tools for fruit, row, and vegetable crop diseases in addition to their growing degree-day model (limited forecasting).
Informative resources:
Please contact Tim Waller – Cumberland Co. Extension (Nursery Agent) if you need assistance setting up and using these powerful tools. (twaller@njaes.rutgers.edu)
Go to: https://go.rutgers.edu/unlavof5 or use the QR code for details and registration.
This annual event is brought to you by Rutgers Cooperative Extension of Middlesex, Monmouth, Mercer, Burlington, Ocean & Somerset Counties.
Seminar topics will benefit those who work in grounds maintenance including school board members, maintenance supervisors, employees of highways, parks, cemeteries, industrial grounds, lawn & home ground services, garden center and nurserymen operators.
2:05–2:35pm Pesticide Safety & IPM Program Update
2:40–3:10pm Weed Management Updates for Landscape Turf
3:15–3:45pm Using Growing Degree Day Models as Part of Your IPM Program
3:50–4:20pm Effects of Climate on Soil Nutrients, pH, & Organic Matter
4:25–4:55pm Spotted Lanternfly Monitoring & Control
5:00–5:30pm Sustainable Landscape Plants for Your IPM Program
5:30pm Closing Remarks
Pesticide Recertification Credits Available |
|
CATEGORY | #Units |
Core (Basic Safety and Handling) | 1 |
1A (Agricultural Plant) | 3 |
3A (Ornamentals) | 1 |
3B (Turf) | 2 |
6B (Right-A-Way) | 2 |
8C (Campground) | 2 |
9 (Regulatory) | 1 |
PP2 (Private Applicator Category) | 3 |