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 | 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 p. 46. 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 = 12, 20, 21, 22, 24 |
|||
| G = 7, 13, 19 |
1. Lannate 90SP | 4 oz | 12 oz | |
| Codling moth (CM) | E = 2, 3, 25, 32, 35, 36, 37 |
2. Guthion 50W | -- | 1.5-3 lb |
| G = 1, 5, 8, 10, 11, 15, 17, 27, 34, 29, 38 |
3. Imidan 70WSB | 16-21 oz | 3-4 lb | |
| White apple leafhopper (WALH) and Rose leafhopper (RLH) | E = 1, 8, 9, 10, 16, 23, 36, 37, 38 |
4. Bacillus thuringiensis | See label | See label |
| G = 6, 7, 11, 15, 18, 29 |
5. Aza-Direct or Neemazad |
-- | 1 qt | |
| 6. Thionex 50WP or 3EC | 0.75 lb or 0.5 qt |
4 lb or 2.66 qt |
||
| 7. Vydate 2L | 1 pt | 3 pt | ||
| San Jose scale (SJS) (2nd generation) | E = 28 |
8. 8Assail 30SG | -- | 2.5-8.04 oz |
| G = 1, 16, 29, 31, 33, 38 |
9. 4Actara 25WG |
-- |
2.0-5.5 oz |
|
| Tentiform leafminers (TLM) | E = 7, 8, 9, 10, 16, 23, 25, 29, 30, 32,
34, 35, 36, 37, 38 |
10. 4Calypso 4F |
1-2 f; pz |
4-8 fl oz |
| G = 1, 5, 15 |
11. Avaunt 30WDG | -- | 5-6 oz | |
| 12. 6Nexter 75WP |
-- | 4.4-5.2 oz | ||
| 13. Vendex 50W | 6 oz | 18 oz | ||
| Apple maggot (AM)5 | E = 2, 3 |
|||
| G = 1, 8, 10, 11, 18, 30, 31 |
||||
| Oriental fruit moth (OFM) | E = 2, 3, 26, 32, 35, 36, 37 |
15. 3Sevin XLR PLUS | 2 pt |
6 pt |
| G = 1, 5, 8, 10, 11, 15, 17, 25, 29, 34, 38 |
16. 4Admire Pro or Pasada 1.6F | -- 1-2 fl oz |
2.4-4.8 fl oz or 4-8 fl oz |
|
| Woolly apple aphid (WAA) |
G = 6, 31, 33 |
17. Intrepid 2F | -- | 12-16 fl oz |
| 18. Surround 50WP | -- | 25 lb |
||
| Stink
bugs (SB)8 |
E = 37, 38 |
19. Acramite 50WS | -- | 12-16 oz |
| G = 1, 2, 6, 8, 9, 10, 36 |
20. Zeal 72WG |
-- |
2-3 oz |
|
| 21. Portal 5EC |
10 fl oz |
2 pt |
||
| Brown marmorated stink bug
(BMSB) |
G = see footnote 20, petal
fall. |
22. Kanemite 15SC | -- | 31 fl oz |
| 23. 4Clutch
50WDG |
-- |
3-6 oz |
||
| 24. Envidor 2SC |
== |
16-18 fl oz |
||
| 25. Rimon 0.83EC |
-- |
20-40 fl oz |
||
| 26. CheckMate OFM-F | -- | 1.3-2.9 fl oz | ||
| 27. CM Virus |
-- |
1 pt (Carpovirusine) 3-6 fl oz (Cyd-X) |
||
| 28. Centaur 70WDG |
-- |
34.5 oz |
||
| 29. Tourismo 3.5SC |
-- | 15-17 fl oz | ||
| 30. Entrust 80WP |
0.5-0.75 oz |
2-3 oz |
||
| 31. Diazinon 50WP |
1 lb |
3 lb |
||
| 32. Delegate 25WG |
-- |
4.5-7 oz |
||
| 33. Movento 2SC |
-- |
6-9 fl oz |
||
| 34. Belt 4SC |
-- |
3-5 fl oz |
||
| 35. Altacor 35WDG |
-- |
2.5-4.5 oz |
||
| 36. Voliam Flexi 40WG |
-- |
4-7 oz |
||
| 37. Voliam Xpress
1.25SC |
-- |
6-12 fl oz |
||
| 38. Leverage 360 |
-- |
2.4-2.8 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 (2), p. 65.
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 for timing recommendations based on DD.
8 Although postboloom
applications of pyrethroids are not recommended, they are the most
effective materials for control of SB. Additional
pyrethroids are listed in tight
cluster.
9 Use
high rate for OFM or SB.
10 See footnote 4, fifth cover.
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Web Site Authors: Alan R. Biggs and Douglas G. Pfeiffer