| Background Information for this page |
| Return to radar list for Monmouth ME |
| Weather data for Monmouth ME. Forecast values begin September 3, 2008 |
| Key Dates are highlighted in yellow boxes |
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| Borers - Roundheaded Appletree Borer RAB & Dogwood Borer |
| RAB
adult emergence begins: June 8. Peak emergence: June 24. RAB egglaying begins: June 17. Peak egglaying period roughly: July 8 to July 23. |
| First RAB eggs hatch roughly: July 2. Peak hatch roughly: July 23 to August 12. |
| First Dogwood borer egg hatch roughly: July 12. Peak hatch roughly: August 15. |
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| Codling Moth CM |
| 1st
generation, first sustained trap catch biofix date: May 27, Tuesday Codling moth development as of September 3: 2nd generation adult emergence at 69% and 2nd generation egg hatch at 30% In most orchards, insecticide targetted against plum curculio and apple maggot prevent codling moth damage. If targetted codling moth control is needed, key management dates are shown below: |
| 1st
generation 3% CM egg hatch: June
19, Thursday (= target date for first spray where multiple sprays needed to control 1st generation CM) See Codling moth tables for follow-up spray dates to maintain protection through 1st generation CM egg hatch. |
| 1st
generation 20% CM egg hatch: June
27, Friday (= target date where one spray needed to control 1st generation codling moth) |
| 2nd
generation 7% CM egg hatch: August
20, Wednesday (= target date for first spray where multiple sprays needed to control 2nd generation CM) If needed and allowed by preharvest interval, see the August Codling Moth table for follow-up spray dates. |
| 2nd
generation 30% CM egg hatch: September
3, Wednesday (= target date where one spray needed to control 2nd generation codling moth) |
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| Lesser Appleworm LAW |
| 1st LAW flight begins around: May 23, Friday. Peak trap catch: June 1. |
| 2nd LAW flight begins around: July 20, Sunday |
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| Mullein Plant Bug MPB |
| The
expected 50% egg hatch date is: May
31, Saturday, which is 3 days before rough estimate of Red Delicious petal fall date. |
| Most
accurate time for limb tapping counts, but possibly after MPB damage has
occurred, is 90% egg hatch date: June 5, Thursday |
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| Obliquebanded Leafroller OBLR |
| 1st generation OBLR flight begins around: June 20, Friday |
| Where
waiting to sample late instar OBLR larvae is not an option (= where OBLR is known to be a problem, and will be managed with insecticide against young larvae): |
| Early
egg hatch and optimum date for initial application of B.t., Intrepid,
Proclaim, SpinTor or other insecticide with comparable efficacy against
OBLR (with follow-up applications as needed): July 7, Monday |
| Where
waiting to sample late instar OBLR larvae to determine need for
treatment is an option, or to check on results from earlier sprays: |
| Optimum
sample date for late instar summer generation OBLR larvae: July 15, Tuesday If first OBLR late instar larvae sample is below threshold, date for confirmation follow-up: July 19, Saturday |
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| Oriental Fruit Moth OFM |
1st generation OFM flight starts, and first treatment date if needed: May 14, Wednesday 1st generation - second treatment date, if needed: June 10, Tuesday |
| 2nd
generation OFM flight begins around:
July 11, Friday 2nd generation - first treatment date, if needed: July 19, Saturday 2nd generation - second treatment date, if needed: August 1, Friday |
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| Plum Curculio PC |
| Increased risk of PC damage as McIntosh and
similar cultivars increase fruit size: June 1, Sunday |
| Earliest safe date for last PC insecticide spray: June 16, Monday |
| Plum curculio spray intervals |
| If relying on repellance by Surround instead of PC mortality by insecticide, Surround coverage should be maintained until PC egglaying begins to naturally decline around Tuesday, July 8. |
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| Redbanded Leafroller RBLR |
| 1st
RBLR flight begins around April 28,
Monday. Peak trap catch and approximate start of egg hatch: May 15, Thursday. |
| 2nd
RBLR flight begins around July 14,
Monday. Peak catch and approximate start of egg hatch: July 23 |
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| San Jose Scale SJS |
| First
adult SJS caught on trap: May 27, Tuesday 1st generation SJS crawlers appear: June 30, Monday |
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| Spotted
Tentiform Leafminer STLM (and presumably Apple Blotch Leafminer) |
| 1st STLM flight, peak trap catch: May 22, Thursday |
| 1st
generation sapfeeding mines start showing:
June 1, Sunday. Optimum sample date is around Monday, June 2, when a larger portion of the mines are visible. |
| ____________________ |
| 2nd STLM flight begins around: June 27, Friday |
| Rough guess of when 2nd generation sap-feeding mines begin showing: July 16, Wednesday. |
| Optimum
first sample date for 2nd generation STLM sapfeeding mines is July 24, Thursday |
| Second
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
July 31, Thursday |
| Third
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
August 15, Friday |
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| Tarnished Plant Bug TPB |
| Rough guess of when TPB begin showing on traps: April 23, Wednesday |
| Rough
guess of when TPB damage results in deformed fruit at harvest instead of aborted bud: May 8, Thursday |
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| White Apple Leafhopper WAL |
| 1st generation WAL found on apple foliage: May 26, Monday |
| 2nd generation WAL found on apple foliage: August 26, Tuesday |
* Rose leafhopper is easily confused with WAL but has different generation dates. Rose leafhoppers typically immigrate into orchards from border row host plants between 1st and 2nd generation WAL. |