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 | 13. Ziram 76DF or WDG | 2 lb | 6.5-8 lb |
| Brooks spot | E = 19, 20, 25, 26, 28, 29 |
19. 2Sovran 50WG | 10-16 oz | 4.0-6.4 oz |
| G = 13, 27 | 20. 2Flint 50WG | -- | 2.0-2.5 oz | |
| Sooty blotch and fly speck | E = 19, 20, 25, 26, 28, 29
G - 13, 27 |
25. Topsin-M 70W + Captan 50W | 2-3 oz + 1 lb | 8-10 oz + 3-4 lb |
| Black rot and white rot | E = 28, 29
G =19, 20, 25, 26, 27 F = 13 |
26. Topsin-M 70W + Ziram 76DF or WDG | 2-3 oz + 1 lb | 8-10 oz + 3-4 lb |
| 27. Captan 50W | 2 lb | 6.5-8 lb | ||
| Bitter rot | E = 29 G = 13, 19, 20, 27, 28 F = 25, 26 |
28. Captan 50W + Ziram 76DF or WDG + Topsin-M 70W | 1 lb + 1 lb + 2-3 oz | 3-4 lb + 3-4 lb + 8-10 oz |
| 29. 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
beneifits 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 = 12, 20, 21, 22, 24 |
1. Lannate 90SP | 4 oz | 12 oz |
| G = 7, 13, 19 |
2. Guthion 50W | 8-10 oz | 1.5-2 lb | |
| Codling moth (CM) | E = 2, 3, 25, 28, 29, 33, 37 |
3. Imidan 70WSB | 16-21 oz | 3-4 lb |
| G = 1, 5, 8, 10, 11, 15, 17, 36 |
4. Bacillus thuringiensis | See label | See label | |
| San Jose scale (SJS) (2nd generation) | E = 27 |
5. Aza-Direct | -- | 1 qt |
| G = 1, 16, 32, 35 |
6. Thionex 50WP or 3EC | 1 lb or 21 fl oz | 3 lb or 4 pt | |
| Leafrollers (VLR & TBM 2nd generation) (RBLR, 3rd generation)2 | E = 17, 25, 30, 31, 33, 34, 36, 37 |
7. Vydate 2L | 1 pt | 3 pt |
| G = 2, 3, 4, 15, 28, 29 |
8. 8Assail 30SG | -- | 2.5-8.0 oz | |
| White apple leafhopper (WALH) and Rose leafhopper (RLH) | E = 1, 8, 9, 10, 16, 23 |
9. 4Actara 25WG |
-- |
2.0-5.5 oz |
| G = 6, 7, 11, 15, 18, 28, 29 |
10. 4Calypso 4F |
1-2 fl oz |
4-8 fl oz |
|
| Tentiform leafminers (TLM) (3rd generation) | E = 7, 8, 9, 10, 16, 23, 25, 30, 31, 33, 34, 37 |
11. Avaunt 30WDG | -- | 5-6 oz |
| G = 1, 5, 15 |
12. 9Nexter 75WP |
-- | 4.4-5.2 oz | |
| Apple maggot (AM)5 | E = 2, 3 |
13. Vendex 50W | 6 oz | 18 oz |
| G = 1, 8, 10, 11, 18, 30, 31, 32 |
||||
| Oriental fruit moth (OFM) | E = 2, 3, 26, 33, 37 |
15. 3Sevin XLR PLUS | 2 pt | 6 pt |
| G = 1, 5, 8, 10, 11, 15, 17, 25 |
16. Provado or Pasada 1.6F | 1-2 fl oz | 4-8 fl oz | |
| Woolly apple aphid (WAA) |
G = 6, 32, 35 |
17. Intrepid 2F | -- | 8-16 fl oz |
| 18. Surround WP | 25 lb | -- | ||
| Stink bugs (SB)10 |
G = 1, 2, 6, 8, 9, 10 |
19. Acramite 50WS | -- | 12-16 oz |
| 20. Zeal 72WG |
-- |
2-3 oz |
||
| 21. Portal 5EC |
10 fl oz |
2 pt |
||
| 22. Kanemite 15SC | -- | 31 fl oz | ||
| 23. Clutch 50WDG |
-- |
3 oz |
||
| 24. Envidor 2SC |
-- |
16-18 fl oz |
||
| 25. 9Rimon 0.83EC |
-- |
20-40 fl oz |
||
| 26. CheckMate OFM-F | -- | 1.3-2.9 fl oz | ||
| 27. Centaur 70WP |
--- |
24.5 oz |
||
| 28. No. 1 + No. 2 | 2 oz + 5 oz | 6 oz + 14-18 oz | ||
| 29. No. 1 + No. 3 |
2 oz + 10 oz | 6 oz + 32 oz | ||
| 30. SpinTor 2SC | 1.25-2.5 fl oz | 5-10 fl oz | ||
| 31. Entrust 80WP |
0.5-0.75 oz |
2-3 oz |
||
| 32. Diazinon 50WP or 4EC |
1 lb or 1 pt |
3 lb or 3 pt |
||
| 33. Delegate 25WG |
-- |
4.5-7 oz |
||
| 34. Proclaim 5SG |
0.8-1.2 oz |
3.2-4.8 oz |
||
| 35. Movento 2SC |
-- |
6-9 fl oz |
||
| 36. Belt 4SC |
-- |
3-5 fl oz |
||
| 37. Altacor 35WDG |
-- |
2.5-4.5 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 20).
3 See note (2), p. 65.
4 Lower rate is effective against leafhoppers; lower rate of Calypso effective against TLM.
5 See note (3), p.63.
6 Use 12-16 fl oz for CM and OFM control.
7
See note
on CM, OFM and TBM on p. 1 for timing recommendations based on DD.
8
2.5-4.0 oz for WALH, RLH, TLM; 5.5-8.0 oz/A for CM, AM, and OFM.
9 Use 8.8-10.7 oz/A for TSM.
10 Although postbloom applications of pyrethroids are not
recommended, they are the most effective materials for control of SB.
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Web Site Authors: Alan R. Biggs and Douglas G. Pfeiffer