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APPLE FIRST COVER SPRAY1

Effectiveness rating: E = excellent, G = good, F = fair


Disease Effectiveness Suggested Chemicals 100 gal Dilute Acre Concentrate
Scab E = 3, 5, 6, 7, 8, 10, 11, 12, 14, 15, 16, 17, 19, 20, 30, 31, 32, 33, 37, 38
 2. Captan 50W 1.5 lb 6.0 lb
  G = 2, 13, 34, 35, 36
 3. Fontelis 1.67SC + mancozeb 75DF -- 14-20 fl oz + 3 lb
  F = 22


Powdery mildew2 E = 5, 6, 7, 8, 10, 11, 12, 19, 20, 34, 35
 5. Luna Sensation 500SC+ mancozeb 75DF -- 4-5.8 fl oz + 3 lb
  G = 3, 14, 15, 16, 17, 22, 30, 31, 32, 33, 36, 37, 38
 6. Luna Tranquility 4.16SC + mancozeb 75DF -- 11-16 fl oz + 3 lb
Rusts E = 8, 10, 11, 12, 15, 16, 17, 30, 31, 32, 33, 34,35, 36, 37
 7. Merivon 4.18SC + mancozeb 75DF -- 4-6.7 fl oz + 3 lb
   G = 3, 5, 6, 7, 13, 14, 38
 8. Rally 40WSP + Captan 50W 1.25-2.0 oz + 1 lb 5.0-7.5 oz + 3.25 lb
Fire blight3 E = 23 10. Rally 40WSP + Ziram 76DF
 1.25-2.0 oz + 1 lb 5.0-7.5 fl oz + 3.25 lb


11. Rally 40WSP + mancozeb 75DF 1.25-2.0 oz + 1 lb 5.0-7.5 oz + 3 lb
 
12. Rally 40WSP + Polyram 80DF 1.25-2.0 oz + 1 lb 5.0-7.5 oz + 3 lb
 Rots and frogeye leaf spot  G = 2, 3, 5, 6, 7, 13, 19, 20, 30, 31, 32, 33, 37
 13. Ziram 76DF
 2 lb 6.5 lb
   F = 8, 10, 11, 12, 34, 35
 14. Procure 50WS + captan 50W 3.0 oz + 1 lb
    15. Procure 50WS + mancozeb 75DF 3.0 oz + 1 lb 12.0 oz + 3 lb
    16. Procure 50WS + Polyram 80DF 3.0 oz + 1 lb 12.0 oz + 3 lb
    17. Procure 50WS + ziram 76DF
 3.0 oz + 1 lb 12.0 oz + 3.25 lb
    19. Sovran 50WG + mancozeb 75DF 10-16 oz
4.0-6.4 oz + 3 lb
    20. Flint 50WG + mancozeb 75DF -- 2.0-2.5 oz + 3 lb


22. Sulfur 2-3 lb 7-10 lb


23. Streptomycin 0.3 lb 1.2 lb


30. Indar 2F + Captan 50W
 --
 8 fl oz
3.25 lb


31. Indar 2F n+ Mancozeb 75DF
 --
 8 fl oz
3 lb


32. Indar 2F + Polyram 80DF
 --
 8 fl oz
3 lb


33. Indar 2F + Ziram 76DF
 --
 8 fl oz
3 lb


34. 4Topguard 1.04SC + Captan 50W
 3.2 fl oz
1.0 lb		 13 fl oz
3.25 lb


35. 4Topguard 1.04SC + mancozeb 75DF
 3.2 fl oz
1.0 lb		 13 fl oz
3 lb


36.  Inspire Super 2.82EW
 --
 12.0 fl oz


37.  Inspire Super + Mancozeb 75DF
 --
 8-5-12 fl oz
3 lb


38. Aprovia + manocozeb
 --
 5.5-7 fl oz
3 lb

1 CAUTION: Do not extend the interval between sprays more than 7 days. See cautions under 1/4-1/2 inch green spray against using captan with oil. See cautions under petal fall spray, page 39, about scab and mildew control. In rust problem areas, maintain control for rusts until spore horns on cedar galls no longer expand when wetted.

2 Excellent powdery mildew control is expected when the Rally or Topguardis used on a 7-10 day interval for scab control. See also comments about disease management in Table 10, page 94. Do not combine sulfur with oil or apply within 14 days of an oil spray. Do not apply more than 24 oz of Bayleton 50DF per acre per season.

3 Streptomycin applications can reduce the incidence of fire blight in green shoots during the early cover spray period. It does not effectively reduce spread in woody shoots. Do not apply streptomycin to apples closer than 50 days to harvest. Observe the 50-day application timing on summer cultivars such as Lodi, Ginger Gold and Gala. Where fire blight blossom and/or shoot infections are being removed during the early season cover spray period, apply streptomycin 1-3 days prior to cutting cankers. In cutting out blight infections, pruning equipment should be sterilized and all pruned cankers should be removed from the orchard. This operation may need to be repeated on a weekly basis. Better results are achieved if the pruning operation is conducted during dry weather. Good potato leafhopper control may help to reduce the spread of shoot blight. See pink and bloom spray for information about use of Apogee for shoot blight management. 

4 Topguard use is restricted to one application every 14 days. 
  


APPLE FIRST COVER SPRAY 1

Effectiveness rating: E = excellent, G = good, F = fair


Insects/Mites Effectiveness Suggested Chemicals 100 gal Dilute Acre Concentrate
 Curculio (PC) E = 3, 13
 1. Lannate 90SP 4 oz 12 oz

G = 10, 11, 12, 21, 33
 2. Tourismo 3.5SC -- 15-17 fl oz
 Mites (ERM)2 E = 4, 5, 9, 14, 19, 23, 24, 25, 26
 3. Imidan 70WSB 16-21 oz 3-4 lb
  G = 8, 15, 20, 22
 4. Apollo 42SC -- 4-8 fl oz
    5. Savey 50DF or Onager 1EC
 -- 3-6 oz or 12-24 fl oz
White apple leafhopper (WALH) E = 1, 7, 10, 12, 33
 6. Aza-Direct or Neemazad
  --  1 qt
  G = 8, 9, 13, 16, 18, 33, 34
 7. Sivanto 200SL
 --
 7-10.5 fl oz
Codling moth (CM)3 E = 3, 11, 27, 29, 32
 8.5Vydate 2L 1 pt 3 pt
  G = 1, 2, 6, 10, 12, 13, 16, 18, 28, 31, 33
 9. 6Agri-Mek, Abba, Temprano 0.15EC, or Agri-Mek 0.7SC
 2.5-5 fl oz
0.5-1.0 fl oz
 10-20 fl oz
2.25-4.25 fl oz
Periodical cicada (C)12 G = 1, 7, 10, 16, 18, 21
 10. 4Assail 30SG  -- 2.5-8.0 oz


11. Exirel
 --
 8.5-17 fl oz


12. 9Calypso 4F
 1-2 fl oz
 4-8 fl oz
 Green aphid (SA/AA) E = 7, 10, 11, 12, 17, 30, 33, 34
 13. Avaunt 30WDG -- 5-6 oz
  G = 1, 8
 14. 7Nexter 75WP
 -- 4.4-5.2 oz


15. Vendex 50W 6 oz 18 oz
Woolly apple aphid (WAA)
 G = 30, 34
 16. 13Sevin 50W 2 lb 6 lb


17.  Beleaf 50SG --
 2-2.8 oz

 
 18. 9Sevin XLR PLUS 2 ptz 6 pt
    19. Nealta --
 8.5-17 fl oz
    20. 11Ultra-Fine oil 2 gal -
    21. Surround WP -- 25 lb


22. Acramite 50WS -- 12-16 oz


23. Zeal 72WDG
 --
 2-3 oz


24. Portal 5EC
 10 fl oz
 2 pt


25. Kanemite 15SC -- 31 fl oz


26. Envidor 2SC
 -- 16-18 fl oz


27. 11Rimon 0.83EC
 -- 20-40 fl oz


28. CM virus
 --
 6.8-13.5 fl oz (Carpovirusine)
3-6 fl oz (Cyd-X)


29.  Delegate 25WG
 --
 4.5-7 oz


30.  14Movento 2SC
 --
 6-9 fl oz


31. Belt 4SC
 --
 3-5 fl oz


32. Altacor 35WDG
 --
 2.5-4.5 oz


33. Belay 2.13EC
 --
 6.0-12.0 fl oz


34. Closer 2SC
 --
 1.5-2.5 fl oz

1 The insects listed under the petal fall spray will still be present if they were not controlled at the optimum time during petal fall. Pest development varies with the conditions of each season. Temperature is a major factor, and a pest may appear as much as two weeks earlier or later in any two successive years. Monitor orchards carefully to determine pest development and best time to spray. In this guide, the first cover spray follows petal fall by 10-14 days and each successive spray interval is assumed to be 10-14 days.

2 Mites develop resistance quickly. Rotate materials; avoid using the same or related compounds repeatedly.

3 See notes on mating disruption, and See note, p. 363.

4 2.5-4.0 oz/A for WALH and SA/AA; 5.5-8.0 oz/A for PC and CM. Addition of 0.5% oil will improve control of CM if using less than 8.0 oz/A. 

5 Likely to thin fruit when used at this time.

6 See comments on p 33.

7 See comments on p 38.

8 See footnote (12), p. 57

9 Lower rate is effective against WALH.

10 Good control of ERM may be achieved by 3 applications of Ultra-Fine Oil at 2-week intervals beginning at petal fall.

11 See note on CM and OFM on p. 1 for timing recommendations based on DD.

12 Although postbloom applications of pyrethroids are not recommended, they are the most effective materials for control of periodical cicada.

13 Sevin may cause mite outbreaks.

14 Movento must be applied with a horticultural oil or a non-ionic spreading and penetrating adjuvant (not a sticker).


 
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Web Site Author:Alan R. Biggs and Douglas G. Pfeiffer