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PEAR PETAL FALL, FIRST THROUGH FIFTH COVER SPRAYS

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


Disease Effectiveness Suggested Chemicals 100 Gal Dilute Acre Concentrate
Scab E = 2 2. Topsin-M 70W + Ziram 76DF or WDG 4 oz + 1 lb 1 lb + 3 lb
Leaf spot G = 2, 4 4. 2Ziram 76DF or WDG 1.5-2 lb 6-8 lb 
Fire blight1 G = 5 5. Streptomycin 6.5 oz (80 ppm) 1.5 lb


6. Flint 50WG
 --
 2.0-2.5 oz


7. Sovran 50WG
 1.0-1.6 oz
 4.0-6.4 oz


8. 3Pristine 38WG
 --
 14.5 oz

1 CAUTION: See cautions about fire blight control under white bud spray, p. 70. Do not apply streptomycin closer than 30 days to harvest. Use of more than four streptomycin sprays per year may lead to streptomycin-resistant fire blight bacteria.

2 Do not apply more than 56 lb per acre per year of Ziram 76DF.

3 Limit the number of applications of Pristine, Flint and Sovran and similar modes of action to four per year. Do not make more than two sequential applications of Pristine before alternating to a fungicide with another mode of action.

PEAR PETAL FALL, FIRST THROUGH FIFTH COVER SPRAYS


Insects/Mites Effectiveness Suggested Chemicals 100 Gal Dilute Acre Concentrate
Pear psylla (PP)1 E = 2, 3, 4, 10, 11, 12, 19, 24
 1. 2Thionex 50WP or 3EC 1.5 lb or 1 qt 5 lb or 3.3 qt
  G = 1, 5, 13, 22, 27
 2. Surround WP 25 lb --


3. Assail 30SG -- 5.5-8.0 oz


4. Calypso 4F
 1-2 fl oz
 4-8 fl oz
    5. Imidan 70WSB 1 lb 3.5 lb
Tarnished plant bug (TPB) E = 6 6. 2Carzol 92SP 6 oz 1 lb
  G = 1, 2, 4, 23


Stink Bugs (SB) E = 6 7. Vendex 50W 6 oz 18 oz
  G = 1, 2, 23
 8. 3Apollo 42SC - 4-8 fl oz
Mites (ERM/TSM) E = 6, 8, 9, 11, 12, 18, 19, 20, 21
 9. 3Savey 50DF or Onager 1EC
 - 3-6 oz or 12-24 fl oz
  G = 7, 17
 10. Esteem 35WP
 -- 5 oz 
Plum curculio (PC) E = 5, 14, 15
 11. 4Agri-Mek, Abba or Temprano 0.15EC 2.5-5 fl oz 10-20 fl oz
  G = 2, 3, 4
 12. 5Nexter 75WP  --  4.4-10.7 oz
Codling moth (CM) E = 5, 15, 24, 25
 13. Provado or Pasada1.6F 5 fl oz 20 fl oz
  G = 3, 4, 10, 14, 26
 14. Avaunt 30WDG -- 5-6 oz
Oriental fruit moth (OFM) E = 5, 15, 16, 24, 25
 15. Guthion 50W 8 oz 1.5-2.0 lb
  G = 3, 4, 14
 16. CheckMate OFM-F -- 1.3-2.9 fl oz


17. Acramite 50WS -- 12-16 oz


18. Zeal 72WG
 --
 2-3 oz


19. Portal 5EC
 10 fl oz
 2 pt


20. Kanemite 15SC
 --
 31 fl oz


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


22. Clutch 50WDG
 --
 3 oz


23. Beleaf 50SG
 --
 2-2.8 oz


24. Delegate 25WG
 --
 6-7 oz


25. Altacor 35WDG
 --
 2.5-4.5 oz


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


27. Movento 2SC
 --
 6-9 fl oz

1 If PP is a problem, alternating sprays of Thionex or Imidan will improve control. If PP is not a problem, reduce insecticide rates for PP by 25%.

2 Do not apply after petal fall.

3 Apply only once per season, when eggs or young mites are present.

4 See comments on p. 33.

5 Use higher rates for PP and TSM.


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