ISHS Acta Horticulturae 36: III International Symposium on Virus Diseases of Ornamental Plants
CONTROL OF THE SPREAD OF THE BROWN RING FORMATION VIRUS DISEASE IN THE LILY MID-CENTURY HYBRID 'ENCHANTMENT' BY MINERAL-OIL SPRAYS |
| Author: | C.J. Asjes |
| Abstract:
In The Netherlands virus diseases in lilies are associated with tulip breaking virus (TBV), lily symptomless virus (LSV), cucumber mosaic virus (CMV), arabis mosaic virus (AMV) (Asjes et al., 1972), and tobacco rattle virus (TRV) (Derks, personal communication). The spread of aphid-borne TBV, LSV and CMV can occur rapidly because the growth period of lilies coincides with the occurrence of flying aphids (Swenson, 1968; van Emden et al., 1969; both referring to several authors). Stylet-borne spread of TBV and CMV in occasional years with excessive spread could abolish the effects of negative mass selection. The use of systemic insecticides to restrict the spread of stylet-borne viruses proved unsuccessful (Broadbent, 1953). However, mineral oil emulsions have given encouraging results for certain viruses, including potato virus Y (Bradley, 1963; Bradley et al., 1966; Loebenstein et al., 1970) and cucumber mosaic virus (Loebenstein et al., 1964; Loebenstein et al., 1970). The present paper reports the effects of certain mineral-oil sprays and the different uses of these products as influenced by spraying at different intervals, concentrations, and spraying at certain periods of the year. | |
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