+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Integrated control of powdery mildew on apple trees by foliar sprays of mono-potassium phosphate fertilizer and sterol inhibiting fungicides

Integrated control of powdery mildew on apple trees by foliar sprays of mono-potassium phosphate fertilizer and sterol inhibiting fungicides

Crop Protection 17(7): 563-568

Foliar sprays of 0.5-1% solutions of KH2PO4 (plus Triton X-100), commercial systemic fungicides, and an alternating treatment of phosphate fertilizer and systemic fungicides inhibited development of the powdery mildew fungus, Podosphaera leucotricha (Ell. and Ev.) E. S. Salmon, on shoots and leaves of apple trees. The effectiveness of alternating an appropriate systemic fungicide with a 1% solution of mono-potassium phosphate (MKP) was similar to that of the commercial treatment with the systemic fungicides. However, application of the systemic fungicides only, omitting the phosphate treatments when they were scheduled, was significantly less effective than either the phosphate or the alternation treatments. These results indicate that the use of phosphate fertilizer has a significant role in disease control, enabling reduced numbers of fungicide treatments against powdery mildew by up to 50%. These results were confirmed in large-scale demonstration trials conducted in commercial orchards in 1996 and 1997. In these trials, the tank-mix of 1% mono-potassium phosphate solution with a half rate of an appropriate fungicide was as effective or superior to that obtained by the standard fungicide treatment. Phosphate solutions were not phytotoxic to plant tissue. The inhibitory effectiveness of mono-potassium phosphate fertilizer makes it a potential major component of an integrated pest management program.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 003179338

Download citation: RISBibTeXText

DOI: 10.1016/s0261-2194(98)00050-7

Related references

Integrated control of powdery mildew on field-grown mango trees by foliar sprays of mono-potassium phosphate fertilizer, sterol inhibitor fungicides and the strobilurin Kresoxym-methyl. European journal of plant pathology 104(9): 853-860, 1998

Integrated control of grapevine powdery mildew with foliar sprays of monopotassium phosphate fertilizer. American Journal of Enology & Viticulture 48(3): 380, 1997

Foliar applications of mono-potassium phosphate fertilizer inhibit powdery mildew development in nectarine trees. Canadian Journal of Plant Pathology 20(3): 253-258, 1998

Efficacy of sterol-inhibiting fungicides against apple scab and powdery mildew when used in postinfection sprays, 1982. Fungicide and nematicide tests: results American Phytopathological Society8(38): 140, 1983

Control of apple powdery mildew with sterol-inhibiting fungicides. Annual report Michigan State Horticultural Society: 17th) 61-69, 1987

Control of apple scab and powdery mildew with sterol inhibiting fungicides. Annual report Michigan State Horticultural Society: 17th) 51-55, 1987

Studies on the foliar nutrition of apple trees. Foliar sprays of phosphate, potassium and a fertilizer containing nitrogen, phosphorus and potassium.. J. hort. Ass, Japan 28: 1-11. bibl. 18, 1959

Vapor activity by sterol-inhibiting fungicides in the control of apple powdery mildew, 1980. Fungicide and nematicide tests results American Phytopathological Society6(36): 19, 1981

Mono-potassium phosphate fertilizer (PeaK) - a component in integrated control of powdery mildews in fruit trees and grapevines. Acta Horticulturae (594): 619-625, 2002

Use of a disease nursery to compare the efficacy of sterol inhibiting fungicides for the control of apple scab and powdery mildew. Plant Protection Quarterly 3(1): 29-30, 1988

Field performance of sterol inhibiting fungicides against apple powdery mildew in the mid atlantic usa apple growing region. Plant Disease 65(12): 1002-1006, 1981

Foliar fertilizer sprays for fruit trees. I. Potassium nitrate sprays for apple trees with blossoms injured by spring frost. Tidsskrift for Planteavl 9(3): 413-416, 1975

Local and systemic control of powdery mildew (Leveillula taurica) on pepper plants by foliar spray of mono-potassium phosphate. Crop Protection 17(9): 703-709, 1998

Mono potassium phosphate (MKP) as part of an integrated pest management program to control powdery mildew. Deciduous Fruit Grower 49(11): S1-S4, 1999

Control of grape powdery mildew by new sterol-inhibiting fungicides. Alon Hanotea 41(5): 427-430, 1987