APPLE SEVENTH AND EIGHTH COVER SPRAY1
Effectiveness rating: E = excellent, G = good, F = fair
| Disease | Effectiveness | Suggested Chemicals | 100 gal Dilute | Acre Concentrate |
| Scab and mildew | See tight cluster- 2nd cover sprays | 1. Ziram 76DF or WDG | 2 lb | 6.5-8 lb |
| Brooks spot | E = 2, 3, 4, 5, 7, 8 |
2. 2Sovran 50WG | 10-16 oz | 4.0-6.4 oz |
| G = 1, 6 |
3. 2Flint 50WG | -- | 2.0-2.5 oz | |
| Sooty blotch and fly speck | E = 2, 3, 4, 5, 7, 8 G - 1, 6 |
4. Topsin-M 70W + Captan 50W | 2-3 oz + 1 lb | 8-10 oz + 3-4 lb |
| Black rot and white rot | E = 7, 8 G = 2, 3, 4, 5, 6 F = 1 |
5. Topsin-M 70W + Ziram 76DF |
2-3 oz + 1 lb | 8-10 oz + 3-4 lb |
| 6. Captan 50W | 2 lb | 6.5-8 lb | ||
| Bitter rot | E = 8 G = 1, 2, 3, 6, 7 F = 4, 5 |
7. Captan 50W + Ziram 76DF + Topsin-M 70W | 1 lb + 1 lb + 2-3 oz | 3-4 lb + 3-4 lb + 8-10 oz |
| 8. 3Pristine
38WG |
-- |
14.5 oz |
1See cautions and summer disease management comments under third cover spray. Observe days-to-harvest limitations on all pesticides (Table 22). Do not apply more than 30 lb active ingredient of captan per acre per year. If mildew is a problem, maintaining mildew protection until terminal shoot growth hardens off will reduce the amount of mildew that overwinters in the buds. This will reduce the severity of mildew next year. Regrowth late in the season may require additional protection to prevent heavy overwintering.
2Use higher rates and
shorter intervals if bitter rot pressure is high. While
benefits for summer disease control are recognized, ratings
for rot diseases are still under evaluation. Caution is
advised on the use of the materials where bitter rot pressure
is heavy.
3Limit the number of applications of Pristine and similar modes of action to four/yr; do not make more than two sequential applications of Pristine before alternating to a fungicide with another mode of action.
APPLE SEVENTH AND EIGHTH COVER SPRAY
Effectiveness rating: E = excellent, G = good, F = fair
| Insects/Mites | Effectiveness | Suggested Chemicals | 100 gal Dilute | Acre Concentrate |
| Mites (ERM/TSM)1 | E = 11, 13, 19, 20, 21, 23 |
1. Lannate 90SP | 4 oz | 12 oz |
| G = 6, 12, 18 |
2. Imidan 70WSB | 16-21 oz | 3-4 lb | |
| Codling moth (CM)7 | E = 2, 5, 24, 27, 31, 34, 35 |
|||
| G = 1, 4, 7, 9, 10, 14, 28, 33 |
4. Aza-Direct or Neemazad | -- | 1 qt | |
| San Jose scale (SJS) (2nd generation) | E = 26 |
5. Exirel |
-- | 8.5-17 fl oz |
| G = 1, 15, 28, 30 |
6. Vydate 2L | 1 pt | 3 pt | |
| Leafrollers (VLR
& TBM
2nd generation) (RBLR,
3rd generation)2, 6 |
E = 5, 16, 20, 28, 29, 31, 32, 34, 35 |
7. 7Assail 30SG | -- | 2.5-8.0 oz |
| G = 2, 3, 4, 14, 27 |
8. 4Actara 25WG | -- | 2.0-5.5 oz | |
| White apple leafhopper (WALH) and Rose leafhopper (RLH) | E = 1, 7, 8, 9, 15, 22, 35 |
9. 4Calypso 4F | 1-2 fl oz | 4-8 fl oz |
| G = 6, 10, 14, 17, 27, 28 |
10. Avaunt 30WDG | -- | 5-6 oz | |
| Tentiform leafminers (TLM) (3rd generation) | E = 5, 6, 7, 8, 9, 22, 24, 28, 29, 31, 32,
33, 34, 35 |
11. 8Nexter 75WP | -- | 4.4-5.2 oz |
| G = 1, 4, 14, 16 |
12. Vendex 50W | 6 oz | 18 oz | |
| Apple maggot (AM)5 | E = 2 |
13. Nealta |
-- |
13.7 fl oz |
| G = 1, 7, 9, 10, 17, 29, 30 |
14. 3Sevin XLR PLUS | 2 pt | 6 pt | |
| Oriental fruit moth (OFM)6 | E = 2, 25, 31, 34, 35 |
15. 4Admire Pro or Alias 4F |
-- 1-2 fl oz |
1.4-2.8 fl oz or 3.2 fl oz |
| G = 1, 4, 7, 9, 10, 14, 16, 22, 24, 28, 33 |
16. Intrepid 2F | -- | 8-16 fl oz | |
| Woolly apple aphid (WAA) |
E = 30 |
17. 9Surround WP | -- | 25 lb |
| G = 36 |
18. Acramite 50WS | -- | 12-16 oz | |
| |
19. Zeal 72WG | -- | 2-3 oz | |
| 20. Portal 5EC | 10 fl oz | 2 pt | ||
| 21. Kanemite 15SC | -- | 31 fl oz | ||
| Brown marmorated stink bug
(BMSB) |
See
BMSB note |
22. Belay 2.13SC | -- | 6-12 fl oz |
| 23. Envidor 2SC | -- | 16-18 fl oz | ||
| 24. Rimon 0.83EC |
-- |
20-40 fl oz |
||
| 25. CheckMate OFM-F | -- | 1.3-2.9 fl oz | ||
| 26. Centaur 70WDG |
--- |
24.5 oz |
||
| 27. No. 1 + No. 2 |
2 oz + 10 oz | 6 oz + 32 oz | ||
| 28. Tourismo 3.5SC |
-- | 15-17 fl oz | ||
| 29. Entrust 2SC |
-- |
6-10 fl oz |
||
| 30. Diazinon 50WP |
1 lb |
3 lb |
||
| 31. Delegate 25WG |
-- |
4.5-7 oz |
||
| 32. Proclaim 5SG |
0.8-1.2 oz |
3.2-4.8 oz |
||
| 33. Belt 4SC |
-- |
3-5 fl oz |
||
| 34. Altacor 35WDG |
-- |
2.5-4.5 oz |
||
| 35. Voliam Flexi 40WG |
-- |
4-7 oz |
1 If mite predators are present, carefully consider the need to control mites this late in the season. Unless they are abundant enough to prevent fruit sizing, or to cause discomfort to pickers, it may be advisable to protect the predators for the next year. Vydate, and Vendex have low toxicity to Stethorus punctum larvae and adults. Nexter is moderately toxic to S. punctum larvae and adults. All of these miticides are moderately or highly toxic to predaceous mites.
2 Monitor VLR, TBM and RBLR male moths with pheromone traps. Monitor eggs and larvae by visual examination. Concentrate search on south side of tree below 5 feet. Time sprays with degree days to coincide with egg hatch. Follow restrictions on minimum days between last spray and harvest (Table 26).
3 See note (11), p. 70.
4 Lower rate is effective against leafhoppers and TLM.
5 See note (3), p.77.
6 See note
on
CM,
OFM
and
TBM on p. 1-2 for timing recommendations based on DD.
7 2.5-4.0 oz for WALH, RLH, TLM; 5.5-8.0 oz/A for CM, AM, and OFM.
8 Use 8.8-10.7 oz/A for TSM.
9
For effective control of JB, apply before adult activity
on trees begins. Apples treated with Surround after second
cover may not be acceptable for sale to processors due to residue.
| Virginia Apple Page | Virginia Pear Page | Virginia Peach Page | Virginia Fruit Homepage | Mid-Atlantic Regional Fruit Loop |
|---|
Web Site Authors: Alan R. Biggs and Douglas G. Pfeiffer