| Background Information for this page |
| Return to radar list for Nashua NH |
| Weather data for Nashua NH. Forecast values begin September 1, 2009 |
| Key Dates are highlighted in yellow boxes |
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| Borers - Roundheaded Appletree Borer RAB & Dogwood Borer |
| RAB
adult emergence begins: May 21. Peak emergence: June 7. RAB egglaying begins: June 2. Peak egglaying period roughly: June 26 to July 13. |
| First RAB eggs hatch roughly: June 17. Peak hatch roughly: July 11 to August 2. |
| First Dogwood borer egg hatch roughly: June 29. Peak hatch roughly: August 5. |
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| Codling Moth CM |
| 1st
generation, first sustained trap catch biofix date: May 11, Monday Codling moth development as of September 1: 2nd generation adult emergence at 100% and 2nd generation egg hatch at 92% 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
3, Wednesday (= 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
12, Friday (= target date where one spray needed to control 1st generation codling moth) |
| 2nd
generation 7% CM egg hatch: August
2, Sunday (= 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: August
11, Tuesday (= 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 5, Tuesday. Peak trap catch: May 15. |
| 2nd LAW flight begins around: July 9, Thursday |
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| Mullein Plant Bug MPB |
| The
expected 50% egg hatch date is: May
8, Friday, which is 9 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: May 12, Tuesday |
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| Obliquebanded Leafroller OBLR |
| 1st generation OBLR flight begins around: June 5, 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., Delegate,
SpinTor, Proclaim, Intrepid, Rimon, Altacor, Belt, pyrethroid or other
insecticide effective against OBLR (with follow-up applications as needed): June 24, Wednesday |
| 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 4, Saturday If first OBLR late instar larvae sample is below threshold, date for confirmation follow-up: July 8, Wednesday |
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| Oriental Fruit Moth OFM |
1st generation OFM flight starts: April 28, Tuesday 1st generation - 55% egg hatch and first treatment date, if needed: May 22, Friday |
| 2nd
generation OFM flight begins around:
June 28, Sunday 2nd generation - first treatment date, if needed: July 7, Tuesday 2nd generation - second treatment date, if needed: July 20, Monday |
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| Plum Curculio PC |
| Increased risk of PC damage as McIntosh and
similar cultivars increase fruit size: May 15, Friday |
| Earliest safe date for last PC insecticide spray: May 25, 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 Monday, June 22. |
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| Redbanded Leafroller RBLR |
| 1st
RBLR flight begins around April 23,
Thursday. Peak trap catch and approximate start of egg hatch: April 28, Tuesday. |
| 2nd
RBLR flight begins around July 1,
Wednesday. Peak catch and approximate start of egg hatch: July 12 |
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| San Jose Scale SJS |
| First
adult SJS caught on trap: May 11, Monday 1st generation SJS crawlers appear: June 16, Tuesday |
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| Spotted
Tentiform Leafminer STLM (and presumably Apple Blotch Leafminer) |
| 1st STLM flight, peak trap catch: May 4, Monday |
| 1st
generation sapfeeding mines start showing:
May 14, Thursday. Optimum sample date is around Saturday, May 16, when a larger portion of the mines are visible. |
| ____________________ |
| 2nd STLM flight begins around: June 12, Friday |
| Rough guess of when 2nd generation sap-feeding mines begin showing: July 4, Saturday. |
| Optimum
first sample date for 2nd generation STLM sapfeeding mines is July 12, Sunday |
| Second
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
July 19, Sunday |
| Third
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
July 30, Thursday |
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| Tarnished Plant Bug TPB |
| Rough guess of when TPB begin showing on traps: April 24, Friday |
| Rough
guess of when TPB damage results in deformed fruit at harvest instead of aborted bud: April 26, Sunday |
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| White Apple Leafhopper WAL |
| 1st generation WAL found on apple foliage: May 8, Friday |
| 2nd generation WAL found on apple foliage: August 7, Friday |
* 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. |