PLUM PREBLOOM SPRAYS
Effectiveness rating: E = excellent, G = good, F = fair
| Disease | Effectiveness | Suggested Chemicals | 100 Gal Dilute | Acre Concentrate |
| Black knot | E = 1
F = 2 |
1. Topsin-M 70W + Captan 50W | 4-6 oz + 1-2 lb | 10-12 oz + 3-6 lb |
| 2. Captan | 2 lb | 4.5 lb | ||
| Brown rot | E = 1
G = 2 |
CAUTION: To reduce potential for development of thiophanate methyl-resistant strains of brown rot and other fungi, these fungicides are recommended only in combination with captan or other fungicides with different modes of action. To achieve successful black knot control, all knots must be cut out of the tree and removed from the orchard or burned before the start of the growing season. Captan may cause injury on Japanese-type and Stanley plums in early season.
PLUM PREBLOOM SPRAYS1
Effectiveness rating: E = excellent, G = good, F = fair
| Insects/Mites | Effectiveness | Suggested Chemicals | 100 Gal Dilute | Acre Concentrate |
| San Jose Scale (SJS) | E = 1, 1+2, 3 |
1. Superior oil | 2 gal | 6 gal |
| Mite eggs (ERM) | E = 1 | 2. Lorsban 3.8E, Nufos 4E,
Yuma 4E or Lorsban 75WG |
1 pt or 10 oz |
2.5 pt or 2 lb |
| 3. Esteem
35W |
-- |
4-5 oz |
1 Control insects
during the dormant or delayed-dormant period.
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Web Site Author: Alan R. Biggs and Douglas G. Pfeiffer