Abstract
Most plant viruses depend on vectors for their survival and spread. Mite-borne plant viruses may cause severe or even crippling losses to many annual and perennial crops in the tropics and semi-tropics which provide ideal conditions for the perpetuation of viruses and their vectors. Many worm mites (Eriophyidae), false spider mites (Tenuipalpidae) and spider mites (Tetranychidae) are known as vectors of virus diseases infecting cereals, fruit trees, pulse crops and coffee plants. Wheat streak mosaic virus (WSMV), wheat spot mosaic virus (WSPMV), ryegrass mosaic virus (RgMV), fig mosaic virus, cherry mottle leaf virus, current reversion disease, pigeon pea sterility mosaic disease and rose rosette diseases are all vectored by different species of eriophyid mites. Virus diseases like citrus leprosis and passion fruit green spot virus are vectored by false spider mites. Barley yellow streak mosaic virus (BaYSMV) is vectored by spider mite, Petrobia latens. Mango malformation disease (MMD) which was earlier reported associated with bud mite Aceria mangiferae is now found to be caused by fungal pathogen, Fusarium moniliforme var. subglutinans. Management of these diseases through genetic host resistance, adoption of cultural practices, chemical applications and various regulatory measures is suggested.
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