Some important actual and anticipated pest emergences as of 5/1/25
- Boxwood leaf miner emergence in southern NJ – monitor locations now.
- Crapemyrtle aphid appearance in southern NJ
- Bronze Birch Borer (BBB) approaching adult emergence
- Red-headed flea beetle (RHFB) egg hatch – adult treatment with systemic applications
- Clearwing Borer adult flight – time to monitor
- Conifer scale crawler emergence anticipated
- (click the ‘Read More’ below for complete dates in S-C-Northern NJ per pest)
Still time to Sign up for the 2025 – Rutgers Ornamental IPM Program
Note we have Clearwing borer lures and wing or delta traps, scale crawler tape, and yellow sticky cards available to commercial grower program members at our Cumberland and Monmouth RCE offices. In Cumberland, Tim is out of the office until 5/6 but there are some monitoring kits available to be picked up, please email twaller@njaes.rutgers.edu if interested).
- Click here for a PDF of April 22, 2025 webinar (contains information on RHFB and early Clearwing borer treatments) Click here for VIDEO of April 22, 2025 webinar
- Click here for a PDF of April 08, 2025 webinar (Contains information on aphids and boxwood leafminer) Click here for VIDEO of April 08, 2025 webinar
Ornamental IPM – next session is Tuesday 5/13/25
all data shown is from uspest.org as of 5/1/2025
| Red-headed Flea Beetle (as of 5/1/25) | |||
| Location | Date | DDs
cumu |
Events |
| NJ50 – South | Jan 1 | 0 | * START * |
| NJ50 – South | Apr 30 | 261 | Start Egg hatch and larvae gen one |
| NJ50 – South | May 1 | 273 | * NOW * |
| NJ50 – South | May 20 | 527 | Start Adult feeding gen one |
| NJ10 – Central | Jan 1 | 0 | * START * |
| NJ10 – Central | May 1 | 221 | * NOW * |
| NJ10 – Central | May 3 | 256 | Start Egg hatch and larvae gen one |
| NJ10 – Central | May 27 | 527 | Start Adult feeding gen one |
| NJ79 – North | Jan 1 | 0 | * START * |
| NJ79 – North | May 1 | 165 | * NOW * |
| NJ79 – North | May 12 | 250 | Start Egg hatch and larvae gen one |
| NJ79 – North | Jun 4 | 520 | Start Adult feeding gen one |
| Clearwing borers (as of 5/1/25) | |||
| Location | Date | DDs
cumu |
Events |
| NJ50 – South | 1 | 0 | * START * |
| NJ50 – South | Apr 21 | 148 | Lilac / Ash Borer (Podosesia syringae) – Adult FLIGHT |
| NJ50 – South | April 22 | 165 | Dogwood Borer (Synanthedon scitula) – Adult FLIGHT |
| NJ50 – South | April 30 | 260 | * NOW * |
| NJ50 – South | May 8 | 361 | Lesser peach tree borer (Synanthedon pictipes) – Adult FLIGHT |
| NJ50 – South | May 20 | 523 | Rhododendron borer (Synanthedon rhododendri) – Adult FLIGHT |
| NJ50 – South | May 24 | 588 | Greater peach tree borer (Synanthedon exitiosa) – Adult FLIGHT |
| NJ10 – Central | 1 | 0 | * START * |
| NJ10 – Central | Apr 25 | 151 | Lilac / Ash Borer (Podosesia syringae) – Adult FLIGHT |
| NJ10 – Central | Apr 26 | 167 | Dogwood Borer (Synanthedon scitula) – Adult FLIGHT |
| NJ10 – Central | April 30 | 211 | * NOW * |
| NJ10 – Central | May 14 | 356 | Lesser peach tree borer (Synanthedon pictipes) – Adult FLIGHT |
| NJ10 – Central | May 27 | 523 | Rhododendron borer (Synanthedon rhododendri) – Adult FLIGHT |
| NJ10 – Central | May 31 | 588 | Greater peach tree borer (Synanthedon exitiosa) – Adult FLIGHT |
| NJ79 – North | 1 | 0 | * START * |
| NJ79 – North | Apr 29 | 148 | Lilac / Ash Borer (Podosesia syringae) – Adult FLIGHT |
| NJ79 – North | Apr 30 | 158 | * NOW *
Dogwood Borer (Synanthedon scitula) – Adult FLIGHT |
| NJ79 – North | May 23 | 351 | Lesser peach tree borer (Synanthedon pictipes) – Adult FLIGHT |
| NJ79 – North | Jun 4 | 515 | Rhododendron borer (Synanthedon rhododendri) – Adult FLIGHT |
| NJ79 – North | Jun 8 | 578 | Greater peach tree borer (Synanthedon exitiosa) – Adult FLIGHT |
| Scale crawlers (as of 5/1/25) | |||
| Location | Date | DDs
cumu |
Events |
| NJ50 – South | 1 | 0 | * START * |
| NJ50 – South | Mar 31 | 65 | Pine Tortoise Scale (Toumeyela parvicornis) – Crawlers START |
| NJ50 – South | Apr 25 | 197 | Tea Scale (Fiorinia theae)- Crawlers START |
| NJ50 – South | Apr 30 | 260 | * NOW *
Taxus mealybug (Dysmicoccus wistariae) – Crawlers/Adults START |
| NJ50 – South | May 3 | 307 | Pine Needle Scale (Chionaspis pinifoliae) – gen1 – Crawlers START |
| NJ50 – South | May 8 | 361 | Elongate Hemlock Scale (Fiorinia externa) – gen1 – Crawlers START |
| NJ50 – South | May 9 | 373 | Oystershell Scale (Lepidosaphes ulmi) – Crawlers START |
| NJ50 – South | May 12 | 411 | Striped pine scale (Toumeyella sp.) – gen1 – Crawlers START |
| NJ50 – South | May 13 | 424 | Pine tortoise scale (Toumeyella parvicornis) |
| NJ10 – Central | 1 | 0 | * START * |
| NJ10 – Central | Apr 4 | 61 | Pine Tortoise Scale (Toumeyela parvicornis) – Crawlers START |
| NJ10 – Central | Apr 30 | 211 | * NOW *
Tea Scale (Fiorinia theae)- Crawlers START |
| NJ10 – Central | May 3 | 251 | Taxus mealybug (Dysmicoccus wistariae) – Crawlers/Adults START |
| NJ10 – Central | May 9 | 306 | Pine Needle Scale (Chionaspis pinifoliae) – gen1 – Crawlers START |
| NJ10 – Central | May 15 | 367 | Elongate Hemlock Scale (Fiorinia externa) – gen1 – Crawlers START |
| NJ10 – Central | May 16 | 378 | Oystershell Scale (Lepidosaphes ulmi) – Crawlers START |
| NJ10 – Central | May 18 | 401 | Striped pine scale (Toumeyella sp.) – gen1 – Crawlers START |
| NJ79 – North | 1 | 0 | * START * |
| NJ79 – North | Apr 19 | 65 | Pine Tortoise Scale (Toumeyela parvicornis) – Crawlers START |
| NJ79 – North | Apr 30 | 158 | * NOW * |
| NJ79 – North | May 6 | 200 | Tea Scale (Fiorinia theae)- Crawlers START |
| NJ79 – North | May 13 | 253 | Taxus mealybug (Dysmicoccus wistariae) – Crawlers/Adults START |
| NJ79 – North | May 19 | 307 | Pine Needle Scale (Chionaspis pinifoliae) – gen1 – Crawlers START |
| NJ79 – North | May 24 | 363 | Elongate Hemlock Scale (Fiorinia externa) – gen1 – Crawlers START |
| NJ79 – North | May 25 | 375 | Oystershell Scale (Lepidosaphes ulmi) – Crawlers START |
| Bronze Birch Borer (as of 5/1/25)(note this is a specific model for BBB) | |||
| Location | Date | DDs
cumu |
Events |
| NJ50 – South | Jan 1 | 2 | * START * |
| NJ50 – South | Mar 30 | 256 | Prepupal larvae in OW cells under bark |
| NJ50 – South | Apr 16 | 405 | Beginning of pupation |
| NJ50 – South | Apr 29 | 630 | * NOW * |
| NJ50 – South | May 5 | 762 | First adults exit trees |
| NJ50 – South | May 15 | 959 | 10% adult emergence |
| NJ50 – South | May 22 | 1111 | 50% adult emergence |
| NJ50 – South | Jun 3 | 1416 | Beginning of egg hatch and larval tunneling |
| NJ50 – South | Jun 10 | 1616 | 90% adult emergence |
| NJ10 – Central | Jan 1 | 3 | * START * |
| NJ10 – Central | Apr 3 | 267 | Prepupal larvae in OW cells under bark |
| NJ10 – Central | Apr 20 | 412 | Beginning of pupation |
| NJ10 – Central | Apr 29 | 565 | * NOW * |
| NJ10 – Central | May 10 | 766 | First adults exit trees |
| NJ10 – Central | May 21 | 966 | 10% adult emergence |
| NJ10 – Central | May 28 | 1116 | 50% adult emergence |
| NJ10 – Central | Jun 9 | 1414 | Beginning of egg hatch and larval tunneling |
| NJ10 – Central | Jun 16 | 1606 | 90% adult emergence |
| NJ79 – North | Jan 1 | 0 | * START * |
| NJ79 – North | Apr 22 | 266 | Prepupal larvae in OW cells under bark |
| NJ79 – North | Apr 29 | 380 | * NOW * |
| NJ79 – North | May 1 | 411 | Beginning of pupation |
| NJ79 – North | May 23 | 752 | First adults exit trees |
| NJ79 – North | Jun 2 | 957 | 10% adult emergence |
| NJ79 – North | Jun 9 | 1114 | 50% adult emergence |
| NJ79 – North | Jun 21 | 1415 | Beginning of egg hatch and larval tunneling |
