| Background Information for this page |
| Return to radar list for Greenville RI |
| Weather data for Greenville RI. Forecast values begin September 2, 2008 |
| Key Dates are highlighted in yellow boxes |
| _________________________________________________________________________________ |
| Borers - Roundheaded Appletree Borer RAB & Dogwood Borer |
| RAB
adult emergence begins: May 27. Peak emergence: June 9. RAB egglaying begins: June 6. Peak egglaying period roughly: June 23 to July 7. |
| First RAB eggs hatch roughly: June 21. Peak hatch roughly: July 8 to July 27. |
| First Dogwood borer egg hatch roughly: June 26. Peak hatch roughly: July 29. |
| ____________________________________________________________________ |
| Codling Moth CM |
| 1st
generation, first sustained trap catch biofix date: May 12, Monday Codling moth development as of September 2: 2nd generation adult emergence at 100% and 2nd generation egg hatch at 96% 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
7, Saturday (= 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
11, Wednesday (= target date where one spray needed to control 1st generation codling moth) |
| 2nd
generation 7% CM egg hatch: July
24, Thursday (= 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
2, Saturday (= target date where one spray needed to control 2nd generation codling moth) |
| ____________________________________________________________________ |
| Lesser Appleworm LAW |
| 1st LAW flight begins around: May 8, Thursday. Peak trap catch: May 17. |
| 2nd LAW flight begins around: July 5, Saturday |
| ____________________________________________________________________ |
| Mullein Plant Bug MPB |
| The
expected 50% egg hatch date is: May
21, Wednesday, which is -2 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 26, Monday |
| ____________________________________________________________________ |
| Obliquebanded Leafroller OBLR |
| 1st generation OBLR flight begins around: June 8, Sunday |
| 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): June 23, 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 1, Tuesday If first OBLR late instar larvae sample is below threshold, date for confirmation follow-up: July 5, Saturday |
| ____________________________________________________________________ |
| Oriental Fruit Moth OFM |
1st generation OFM flight starts, and first treatment date if needed: April 28, Monday 1st generation - second treatment date, if needed: June 1, Sunday |
| 2nd
generation OFM flight begins around:
June 27, Friday 2nd generation - first treatment date, if needed: July 4, Friday 2nd generation - second treatment date, if needed: July 15, Tuesday |
| _____________________________________________________________________ |
| Plum Curculio PC |
| Increased risk of PC damage as McIntosh and
similar cultivars increase fruit size: May 17, Saturday |
| Earliest safe date for last PC insecticide spray: May 27, Tuesday |
| 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 23. |
| ____________________________________________________________________ |
| Redbanded Leafroller RBLR |
| 1st
RBLR flight begins around April 19,
Saturday. Peak trap catch and approximate start of egg hatch: May 1, Thursday. |
| 2nd
RBLR flight begins around June 29,
Sunday. Peak catch and approximate start of egg hatch: July 5 |
| ____________________________________________________________________ |
| San Jose Scale SJS |
| First
adult SJS caught on trap: May 12, Monday 1st generation SJS crawlers appear: June 14, Saturday |
| ____________________________________________________________________ |
| Spotted
Tentiform Leafminer STLM (and presumably Apple Blotch Leafminer) |
| 1st STLM flight, peak trap catch: May 9, Friday |
| 1st
generation sapfeeding mines start showing:
May 17, Saturday. Optimum sample date is around Sunday, May 18, when a larger portion of the mines are visible. |
| ____________________ |
| 2nd STLM flight begins around: June 12, Thursday |
| Rough guess of when 2nd generation sap-feeding mines begin showing: July 1, Tuesday. |
| Optimum
first sample date for 2nd generation STLM sapfeeding mines is July 8, Tuesday |
| Second
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
July 14, Monday |
| Third
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
July 23, Wednesday |
| ____________________________________________________________________ |
| Tarnished Plant Bug TPB |
| Rough guess of when TPB begin showing on traps: April 17, Thursday |
| Rough
guess of when TPB damage results in deformed fruit at harvest instead of aborted bud: April 23, Wednesday |
| ____________________________________________________________________ |
| White Apple Leafhopper WAL |
| 1st generation WAL found on apple foliage: May 12, Monday |
| 2nd generation WAL found on apple foliage: July 31, Thursday |
* 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. |