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
G = 13, 27 |
19. 2Sovran 50WG | 10-16 oz | 4.0-6.4 oz |
| Sooty blotch and fly speck | E = 19, 20, 25, 26, 28, 29
G = 13, 27 |
20. 2Flint 50WG | -- | 2.0-2.5 oz |
| 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 |
27. Captan 50W | 2 lb | 6.5-8 lb |
| 26. Topsin-M 70W + Ziram 76DF or WDG | 2-3 oz + 1 lb | 8-10 oz + 3-4 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 |
1 CAUTION: Do not apply mancozeb or Polyram within 77 days of harvest. Without the broad spectrum rot control of the EBDC fungicides (mancozeb and Polyram), potential rot problems should be anticipated. Monitor orchard blocks frequently for rots, sooty blotch and fly speck. Benlate and Topsin-M do not effectively control bitter rot. Do not apply more than 64 lb of Captan 50W per acre per year. Do not use more than 56 lb of Ziram 76DF per acre per year.
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 THIRD COVER SPRAY 1
Effectiveness rating: E = excellent, G = good, F = fair
| Insects/Mites | Effectiveness | Suggested Chemicals | 100 gal Dilute | Acre Concentrate |
| 1. Esteem 35W |
-- |
4-5 oz |
||
| Tentiform Leafminers (TLM) (2nd generation) | E = 8, 9, 10, 11, 16, 23, 25, 30, 31, 33,
34, 36, 37, 38 |
2. Lannate 90SP | 4 oz | 12 oz |
| G = 2, 6, 15 |
3. Guthion 50W | -- | 1.5-3 lb | |
| Mites (ERM/TSM)1 | E = 13, 20, 21, 22, 24 |
4. Imidan 70WSB | 16-21 oz | 3-4 lb |
| G = 8, 14, 19 |
5. Bacillus thuringiensis | See label | See label | |
| Codling moth (CM) | E = 3, 4, 25, 28, 29, 33, 37, 38 |
6. Aza-Direct | -- | 1 qt |
| G = 1, 2, 6, 9, 11, 12, 15, 17, 30, 36 |
7. Thionex 50WP or 3EC | 0.75 lb or 0.5 qt |
4 lb or 2.66 qt |
|
| San Jose scale (SJS)2 | E = 1, 27 |
8. Vydate 2L | 1 pt | 3 pt |
| G = 2, 16, 30, 32, 35 |
9. 8Assail 30SG | -- | 2.5-8.0 oz | |
| 10. 5Actara
25WG |
-- |
2.0-5.5 oz |
||
| 11. Calypso 4F |
1-2 fl oz |
4-8 fl oz |
||
| Variegated leafroller and tufted apple budmoth (VLR & TBM)2 | E = 17, 25, 30, 31, 33, 34, 36, 37, 38 |
12. Avaunt 30WDG | -- | 5-6 oz |
| G = 3, 4, 5, 15, 28, 29 |
13. 9Nexter 75WP |
-- | 4.4-5.2 oz | |
| Rose leafhopper (RLH) | E = 2, 7, 9, 10, 11, 16, 23, 38 |
14. Vendex 50W | 6 oz | 18 oz |
| G = 8, 12, 15, 18, 28, 29, 30 |
15. 4Sevin XLR PLUS | 2 pt | 6 pt | |
| Apple maggot (AM)3 | E = 3, 4 |
|||
| G = 2, 9, 11, 12, 18, 28, 29, 31, 32 |
||||
| Oriental fruit moth (OFM) | E = 3, 4, 26, 28, 29, 33, 37, 38 |
16. 5Admire Pro or Pasada 1.6F | -- 1-2 fl oz |
1.4-2.8 fl oz or 4-8 fl oz |
| G = 2, 6, 9, 11, 12, 15, 17, 25, 30, 36 |
17. Intrepid 2F | -- | 8-16 fl oz | |
| Woolly apple aphid (WAA) |
G = 7, 32, 35 |
18. 10Surround WP | -- | 25 lb |
| 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. 6Rimon
0.83EC |
-- |
20-40 fl oz |
||
| 26. CheckMate OFM-F | -- | 1.3-2.9 fl oz | ||
| 27. Centaur 70WDG |
-- |
34.5 oz |
||
| 28. No. 2 + No. 3 | 2 oz + 5 oz | 6 oz + 14-18 oz | ||
| 29. No. 2 + No. 4 | 2 oz + 10 oz | 6 oz + 32 oz | ||
| 30. Tourismo 3.5SC |
-- | 15-17 fl oz | ||
| 31. Entrust 80WP |
0.5-0.75 oz |
2-3 oz |
||
| 32. Diazinon 50WP |
1 lb |
3 lb |
||
| 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 |
-- |
2.5-2.5 oz |
||
| 38. Voliam flexi 40WG |
-- |
4-7 oz |
1 Make two 3-minute predator counts (7 days apart). Count larval and adult black ladybugs (Stethorus punctum). Also count numbver of mobile mites on 10 leaves on each date and calculate an average. Record these numbers. If the number of S. punctum per 3 minutes is at least 2.5 times the number of mites per leaf, biological control is likely. Abundance of other predators (predatory mites, mirids, Orius) may slightly decrease densities of S. punctum required for biological control.
2 Leafroller eggs should now be present. Examine foliage carefully. Sprays should be timed with degree days to coinicde with larval emergence (see p. 1). Contact of egg masses with sprays containing methomyl will kill larvae within eggs. Use pheromone traps to determine male moth activity and species present.
3 AM is seldom a problem in our region, except where an abandoned orchard is nearby. Growers interested in exporting to certain countries should be prepared to control AM starting at 900 degree days above 90 degrees F after Jan. 1.
4 See note (12), p. 57
5 Lower rate is effective against RLH.
6 See note on CM, OFM and TBM on p. 1 for timing recommendations based on DD.
7 Use 12-16 fl. oz for CM and OFM
control.
82.5-4.0
oz/A
for
TLM and RLS; 5.5-8.0 oz/A for CM, OFM, and AM.
98.8-10.7
oz for TSM.
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Web Site Authors: Alan R. Biggs and Douglas G. Pfeiffer