Establishment of phenological stages in guava cultivars across seasons
2016
Ahmed, H.S.
Guava (Psidium guajava L.) belongs to the family Myrataceae. The study was conducted to observe the effect of different environmental factors (Temperature, Rainfall, Relative Humidity and Day Length) on the phenological stages of guava tree. The study was carried out in Square # 9 University of Agriculture Faisalabad. Three guava varieties (Gola, Surahi and Surkha) were studied for phonological stages. Four trees of each cultivar were selected. Three branches per tree per variety will be selected at different direction such as East, West, North and south and tagged for the study. The data was taken after every five days to observe the growth pattern of sixteen growth stages of Guava Cultivar. The data was recorded for two seasons (summer and winter) among the three selected varieties Gola showed significant results in case of bud length, bud width and fruit diameter. The data about length and width of leaf and width of flower bud and diameter of fruit will be taken to see the effect of light, temperature and rainfall. The correlation between environmental factors and phenological stages shows that the rainfall is highly correlated with vegetative growth and Day length is highly correlated with fruit growth. The experiment was carried out according to Randomized Complete Block Design and data was analyzed by ANOVA/T- Test according to DMR test. The result revealed that Gola variety showed good results as compared to Surahi and Surkha but the attack of fruit fly was maximum on Gola.
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