Artemisia sieberi (Asteraceae) is an important perennial plant that common in the pastures, mountains and deserts of Iran. In 2019, A. showing little leaf, yellowing, internode shortening witches’-broom symptoms (Fig. 1) were observed around Abarkooh (Yazd province, Iran). The disease incidence was up to 5%. Total DNA extracted from 0.2 g fresh midrib tissue 10 diseased five symptomless plants ...

curly top disease is one of the important diseases of sugar beet. spatial pattern and population variation of leafhoppers circulifer haematoceps, and c. tenellus, vectors of sugar beet curly top virus, were studied in hamadan province, iran for three years (2007- 2009). sampling was carried out at the early stage of the plant growth, in accordance with planting date for 9 weeks, in 7- 10 day in...

Strausbaugh, C. A., Wenninger, E. J., and Eujayl, I. A. 2014. Control of curly top in sugar beet with seed and foliar insecticides. Plant Dis. 98:10751080. Curly top in sugar beet is a serious problem that is caused by Beet curly top virus and other closely related species and transmitted by the beet leafhopper. In order to find a means of reducing curly top in sugar beet, 15 combinations of in...

Beet curly top virus (BCTV), genus Curtovirus, and other closely related curtoviruses transmitted by the beet leafhopper Circulifer tenellus (Baker) have caused significant problems to irrigated agriculture in the western United States for over a century (4). BCTV is known to infect a broad range of crop and weed hosts in many plant families (1). The leafhopper vector also feeds and breeds on a...

Antiserum production. Antiserum was Fletcher, J., and Slack, S. A. 1986. Latex agglutination as a rapid detection assay for Spiroplasma produced in New Zealand white ra 3 citri. Plant Disease 70:754-756. against Illinois horseradish isolates and BR6 as described (5). Antiserum titer The latex agglutination test (LAT) was effective in detecting the wall-less mollicute Spiroplasma was 1: 16,000 b...