IngentaConnect Effect of cultural methods on leaf spot (Mycosphaerella fragariae...

Authors: Schmid, Andi¹; Daniel, Claudia²; Weibel, Franco²

Source: BioControl, Volume 50, Number 1, February 2005 , pp. 179-194(16)

Publisher: Springer

Abstract:

Damage of leaf spot, caused by Mycosphaerella fragariae and gray mold also called Botrytis fruit rot, caused by Botrytis cinerea, average fruit weight and yield were evaluated with regard to cultural methods over 2years. Leaf spot damage decreased significantly by around 90% due to leaf sanitation (removal of dead and leaf spot infected leaves in early spring) and by 50% due to plantation in a one-row-system instead of a two-row-system. When all leaves including the healthy green ones were removed in early spring, average fruit weight decreased significantly by 10%. Fruit sanitation – the third treatment – did not influence any of the measured parameters. Neither leaf sanitation nor fruit sanitation (removal of damaged fruits during harvest) reduced B. cinerea damage significant. Only the combination of a one-row-system, leaf sanitation and fruit sanitation almost halved (not significantly) B. cinerea damage in the first crop year compared to a two-row-system without leaf and fruit sanitation. B. cinerea damage correlated significantly and positively with the biomass of plants by R²= 0.47. According to this study and the cited literature it is suggested for humid Central European conditions to apply a one-row-system combined with leaf sanitation in early spring and fruit sanitation during harvest if fruit density is high, to reduce the risk of damages in larger dimension caused by M. fragariae and B. cinerea.

Keywords: average fruit weight; biomass; Biotica: Fragaria × ananassa Duch.(Rosaceae); Botrytis cinerea Pers; fruit sanitation; leaf sanitation; Mycosphaerella fragariae Tul; yield

Document Type: Research article

DOI: 10.1007/s10526-004-0453-9

Affiliations: 1: Research Institute of Organic Agriculture (FiBL), Ackerstrasse,Frick, CH-5070, Switzerland, Email: andi.schmid@fibl.ch 2: Research Institute of Organic Agriculture (FiBL), Ackerstrasse,Frick, CH-5070, Switzerland,

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Effect of cultural methods on leaf spot (Mycosphaerella fragariae) and gray mold (Botrytis cinerea) damage in strawberries