The most obvious symptom of systemic virus infection is the mosaic pattern of the leaves. Yellowing, chlorosis is also frequent and characteristic sign of the altered photosynthetic activity. Virus infection effects photosynthesis in a complex manner, depending on the particular host-virus combination. The symptoms are basically different in the incompatible […]

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Rose rosette disease is an untreatable rose disease caused by the Rose rosette virus (RRV), and is spread and introduced into the rose during feeding by the rose leaf curl mite (Phyllocoptes fructiplilus). This extremely small eriophyid mite feeds on cell sap of the tender stems and leaf petioles. The […]

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SCIENTIFIC NAME: Saccharum officinarum INTROUDCITON: Sugar cane is C4 plant it is a parineal crop. The plant takes 10 to 12 month under Pakistani condition. 18 month under Australian condition and 24 month in Cuba and Brazil condition to complete its life cycle. The plant grows from seed set called […]