Effect of bagging time and fruit color on fruit fly attack and its impact on yield of crystal guava in Karanganyar, Indonesia

Abstract

Crystal guava is a popular fruit in Indonesia. One of the main obstacles in cultivating crystal guava is the fruit fly infestation which reduces productivity up to 100 per cent. The most effective way to control fruit flies is to do fruit bagging since the fruit is small. Studies were conducted to determine the effect of bagging time, fruit diameter, and fruit color on the intensity of fruit fly attacks and their impact on the quality and yield of crystal guava in Karanganyar. The research was carried out at the guava crystal center, Bangsri Karanganyar. The method used was purposive sampling, namely guava fruit that was three weeks old after the flowers bloomed, with variations in bagging time at weeks 3, 4, 5, 6, 7, 8, 9, 10 and 11. Measurements of diameter and color of fruit before bagging, observation of attack intensity and yield and quality of fruit were recorded shortly after harvest. The results showed that bagging time
and fruit color affected the intensity of fruit fly attacks. Fruit fly attack significantly affected weight, external appearance and internal appearance.