Language selection

Search

Management of apple scab in organic orchards. presented at the PLANT BIOLOGY 2017 CONFERENCE in Honolulu, Hi, USA from 24-29, 2017. (poster)

Errampalli, D. 2017. Management of apple scab in organic orchards. presented at the PLANT BIOLOGY 2017 CONFERENCE in Honolulu, Hi, USA from 24-29, 2017. (poster)

Abstract

Apple scab caused by Venturia inaequalis is an important disease of apples and results in economic losses. The conidia of V. inaequalis infect leaves and the developing fruit through rainfall and air. This study aims to examine the effect of organic fungicides against V. inaequalis in reducing the development of apple scab in ‘McIntosh’ and ‘Empire’ apples in the orchard. During the summers of 2014 and 2015, apples were sprayed with three organic fungicides, a water control and a chemical control (N-trichloromethylthio-4-cyclohexene-1,2-dicarboximide). The three organic fungicides used were Sulphur (Kumulus), a 0.25% Reynoutria sachalinensis (Regalia #1) and 0.25% pre bloom and 0.75% post bloom R. sachalinensis (Regalia#2). A disease rating scale was used to take observations of the presence of apple scab on ‘McIntosh’ leaves and fruits. Observations on apple scab disease were made over a period of three months in 2014 and in 2015 which showed a gradual increase in disease progression. Two way ANOVA tests were also performed to determine any statistical differences between and among all five treatments. Results indicated that the Sulphur treatment was the most effective organic fungicide followed by R. sachalinensis in reducing apple scab disease in ‘McIntosh’ apple leaves and fruits.

Report a problem on this page
Please select all that apply:
Date modified: