| Background Information for this page |
| Return to radar list for South Burlington VT |
| Weather data for South Burlington VT. Forecast values begin May 19, 2013 |
| Borers - Roundheaded Appletree Borer (RAB) & Dogwood Borer |
| RAB egglaying begins: September 22. Peak egglaying period roughly: September 22 to September 22. |
| First RAB eggs hatch roughly: October 7. Peak hatch roughly: October 7 to October 12. |
| First Dogwood borer egg hatch roughly: October 1. Peak hatch roughly: October 12. |
| Codling Moth (CM) |
| Too early for CM status report |
| 1st
generation 3% CM egg hatch: October
1, Tuesday, = 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: October
1, Tuesday, = target date where one spray needed to control 1st generation CM. |
| 2nd
generation 7% CM egg hatch: October
1, Tuesday, = 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: October
1, Tuesday, = target date where one spray needed to control 2nd generation CM. |
| Lesser Appleworm LAW |
| 1st LAW flight begins around: May 14, Tuesday. Peak trap catch: May 25. |
| 2nd LAW flight begins around: September 22, Sunday. |
| Mullein Plant Bug MPB |
| The
expected 50% egg hatch date is: May
18, Saturday, which is 5 days before rough estimate of Red Delicious petal fall date. |
| Most
accurate time for limb tapping counts, or treatment if needed, but possibly after some MPB damage has occurred, is 90% egg hatch date: May 23, Thursday. |
| Obliquebanded Leafroller OBLR |
| 1st generation OBLR flight begins around: September 22, 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., Delegate,
Proclaim, Intrepid, Rimon, Altacor, Belt, pyrethroid or other insecticide
effective against OBLR (with follow-up applications as needed): September 22, Sunday. |
| 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: September 22, Sunday If first OBLR late instar larvae sample is below threshold, date for confirmation follow-up: September 22, Sunday. |
| Oriental Fruit Moth OFM |
1st generation OFM flight starts: May 7, Tuesday. 1st generation 55% egg hatch and first treatment date, if needed: September 1, Sunday. |
| 2nd
generation OFM flight begins around:
September 22, Sunday. 2nd generation - first treatment date, if needed: May 27, Monday. 2nd generation - second treatment date, if needed: September 1, Sunday. |
| Plum Curculio PC |
| Increased risk of PC damage as McIntosh and
similar cultivars increase fruit size: May 24, Friday. |
| Earliest safe date for last PC insecticide spray: June 29, Saturday. |
| 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 Saturday, June 29. |
| Redbanded Leafroller RBLR |
| 1st
RBLR flight begins around April 25,
Thursday. Peak trap catch and approximate start of egg hatch: May 7, Tuesday. |
| 2nd
RBLR flight begins around September 22,
Sunday. Peak catch and approximate start of egg hatch: September 22. |
| San Jose Scale SJS |
| First
adult SJS caught on trap: May 23, Thursday. 1st generation SJS crawlers appear: September 22, Sunday. |
| Spotted Tentiform Leafminer
STLM (and presumably apple blotch leafminer) |
| 1st STLM flight, peak trap catch: January 1, Sunday. |
| 1st generation sapfeeding mines start showing: May 24,
Friday. Optimum sample date is around Saturday, May 25, when a larger portion of the mines are visible. |
| 2nd STLM flight begins around: September 22, Sunday. |
| Rough guess of when 2nd generation sap-feeding mines begin showing: September 21, Saturday. |
| Optimum
first sample date for 2nd generation STLM sapfeeding mines is September 21, Saturday. |
| Second
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
September 22, Sunday. |
| Third
optimized sample date for 2nd generation STLM sapfeeding mines, if needed:
September 22, Sunday. |
| Tarnished Plant Bug TPB |
| Rough guess of when TPB begin showing on traps: May 18, Saturday. |
| Rough
guess of when TPB damage results in deformed fruit at harvest instead of aborted bud: May 7, Tuesday. |
| White Apple Leafhopper WAL |
| 1st generation WAL found on apple foliage: May 16, Thursday. |
| 2nd generation WAL found on apple foliage: September 22, Sunday. |
| *
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. |