ISHS Acta Horticulturae 346: V International Symposium on Vaccinium Culture
POPULATIONS OF THE SHARPNOSED LEAFHOPPER VECTOR, SCAPHYTOPIUS SPP. AND BLUEBERRY STUNT INFECTION PERIODS IN HIGHBUSH BLUEBERRY |
| Authors: | D.C. Maeso Tozzi, R.E. Davis, I.M. Lee, D.C. Ramsdell, O. Taboada |
| Abstract:
Population levels of Scaphytopius spp., probable sharpnosed leafhopper vectors of blueberry stunt disease (BBSD), were monitored during 1989 and 1990 using yellow sticky traps. Scaphytopius magdalensis, S. frontalis and S. acutus had two population peaks, one after petal fall stage and a larger second peak in late summer to early autumn. Healthy, highbush blueberry (Vaccinium corymbosum L.) cv Bluecrop plants were placed under stunt-diseased bushes in the field for 2-wk periods during 1989 and 1990. These plants and some of the leafhoppers trapped during 1990 and 1991 were tested for mycoplasma-like organism (MLO) infection with a DNA probe that detected BBSD-associated MLO. The percentage of plants and the number of Scaphytopius spp. that were MLO-positive tended to follow the same bimodal distribution found in the population studies. | |
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