Abstract

Following is the result of a survey hold over a two year period(1971-1972), on the appearence and disappearence of ticks on cattle in Cheju. Number of Haemaphysalis longicornis. Larvae: From the beginning of July to mid September larvae abounded reaching their peak during July and August. In 1971 their period was from July to September. In 1972 their period was from May to October. In both years their number reached their highest point in July and August(Table 1.2) Nymph: Ticks were found from February to October(1971) and January to December (1972), and they were especially plentiful during the periods of may (1971)(Table 1.2). Adult : Ticks were in evidence from April to October(1971) and January to December(1972). They were especially plentiful during the periods of July and August(1971) and August(1972). However, in 1972 they were also quite plentiful in June and July(1972)(Table 1.2). Percentage of Haemaphysalis longicornis. 1971(Fig. 1): February-May: nymph 94.1 percent, adult female 5.9 percent ; July-August: larvae 54.8 percent, 1972(Fig. 2) : January-May: larvae 18.2 percent, nymph 18.2 percent, adult female 3.8 percent; July-August: larvae 48.2 percent, nymph 11.6 percent, adult female 40.2 percent. Number of Boophilus microplus: larvae; Ticks were in evidence from April to October(1971) and January to December(1972). They were especially plentiful during the periods of June adn July(1971) and July to August(1972). However, in 1972 they were also quite plentiful in May. Nymph: Ticks were in evidence from January to December 1971 and 1972. They were especially plentiful during the periods of June and August(1971) and May to September(1972). However, in 1972 they were also quite plentiful in October and November. Adult: Ticks were in evidence from January to December 1971 and 1972. They were especially plentiful during the periods of July to September(1971) and July (1972). However, in 1972 they were also quite plentiful in May to August. Percentage of Boophilus microplus. 1971(Fig. 3): January-May: larvae 40.3 percent, nymph 32.3 percent, adult female 27.1 percent, July-August: larvae 31.2 percent , nymph 35.7 percent, adult female 33.5 percent. 1972(Fig. 4): January-May: larvae 32.8 percent , nymph 42.1 percent, adult female 25.1 percent, July-August: larvae 44.2 percent, nymph 26.4 percent, adult female 29.4 percent.