APPLE SIXTH 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 |
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, 8 |
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 p. 76. Observe days-to-harvest limitations on all pesticides (Table 20). 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 SIXTH COVER SPRAY
Effectiveness rating: E = excellent, G = good, F = fair
| Insects/Mites | Effectiveness | Suggested Chemicals | 100 gal Dilute | Acre Concentrate |
| Mites (ERM) | E = 11, 9, 20, 21, 35 |
|||
| G = 6, 12, 18 |
1. Lannate 90SP | 4 oz | 12 oz | |
| Codling moth (CM) | E = 2, 5, 24, 31, 33, 34 |
2. Imidan 70WSB | 16-21 oz | 3-4 lb |
| G = 1, 4, 7, 9, 10, 14, 22, 26, 28, 32 |
3. Bacillus thuringiensis | See label | See label | |
| White apple leafhopper (WALH) and Rose leafhopper (RLH) | E = 1, 7, 8, 9, 15, 16, 22, 34 |
4. Aza-Direct or Neemazad | -- | 1 qt |
| G = 5, 6, 10, 14, 17, 28 |
5. Exirel |
-- | 8.5-17 fl oz | |
| 6. Vydate 2L | 1 pt | 3 pt | ||
| 7. 2Assail 30SG | -- | 2.5-8.04 oz | ||
| San Jose scale (SJS) (2nd generation) | E = 27 |
8. 4Actara 25WG | -- | 2.0-5.5 oz |
| G = 1, 15, 28, 30, 36 |
9. 4Calypso 4F | 1-2 fl oz | 4-8 fl oz | |
| Tentiform leafminers (TLM) | E = 6, 7, 8, 9, 15, 22, 24, 28, 29, 31, 32,
33, 34 |
10. Avaunt 30WDG | -- | 5-6 oz |
| G = 1, 4, 14, 16 |
11. 6Nexter 75WP | -- | 4.4-5.2 oz | |
| 12. Vendex 50W | 6 oz | 18 oz | ||
| 13. Beleaf 50SG |
-- |
2-2.8 oz |
||
| Apple maggot (AM)5 | E = 2 |
14. 3Sevin XLR PLUS | 2 pt | 6 pt |
| G = 1, 7, 9, 10, 17, 29, 30, 36 |
15. 4Admire Pro or Alias 4F | -- 1-2 fl oz |
2.4-4.8 fl oz or 3.2 fl oz |
|
| Oriental fruit moth (OFM) | E = 2, 5, 25, 31, 33, 34 |
16. Intrepid 2F | -- | 12-16 fl oz |
| G = 1, 4, 7, 9, 10, 14, 16, 22, 24, 26, 28,
32 |
17. 8Surround 50WP | -- | 25 lb | |
| Woolly apple aphid (WAA) |
E = 30 |
18. Acramite 50WS | -- | 12-16 oz |
| G = 13 |
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. CM Virus |
-- |
1 pt (Carpovirusine) 3-6 fl oz (Cyd-X 0.5-3.0 fl oz (Madex) |
||
| 27. Centaur 70WDG |
-- |
34.5 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. Belt 4SC |
-- |
3-5 fl oz |
||
| 33. Altacor 35WDG |
-- |
2.5-4.5 oz |
||
| 34. Voliam Flexi 40WG |
-- |
4-7 oz |
||
| 35. Nealta |
-- |
13.7 fl oz |
||
| 36. Closer 2SC |
-- |
1.5-2.75 fl oz |
1 Examine fruit for injury by first generation larvae, and monitor with pheromone traps to determine need for third generation control.
2 2.5-4.0 oz/A for WALH and RLH; 5.5-8.0 oz/A for CM, AM and OFM.
3 See note 11, p. 70.
4 Lower rate is effective against leafhoppers.
5 See note (3), Third cover.
6 Use 8.8-10.7 oz/A for TSM
7 See note
on
CM and OFM on p. 1-2 for timing recommendations based on DD.
8 For effective control of JB, apply before
adult activity on trees begins. Apples treated with Surround
after seond cover may not be acceptable for sale to processors due
to residue.
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Web Site Authors: Alan R. Biggs and Douglas G. Pfeiffer