Seasonal abundance of the ceriferous wax scale (Ceroplastes pseudoceriferus) in southern Taiwan and its control.
Wen H. C., Lee H. S.
Author Affiliation: Div. Plant Protection, Fengshan Trop. Hort. Exp. Sta., Taiwan Agric. Res. Inst., Kaohsiung Hsien, Taiwan.
Journal of Agricultural Research of China 35 : 216-221
Abstract : There were 3 generations a year of Ceroplastes pseudoceriferus (one of the most important pests of mango and litchi [Litchi chinensis]) in southern Taiwan. The scale population was highest in the summer generation (June-September), followed by the winter (September-March) and spring generations (February-July). The number of eggs laid per female averaged 1445.2, 1103.5 and 1287.7 for these 3 generations, respectively. Crawlers occurred mainly from late June to late July, late September to early November, and late March to late April. The parasitic aphelinid Coccophagus hawaiiensis was found in all orchards sampled for the coccid, and parasitized 4.43-33.95% of the scales. Sprays of azinphos-methyl (as 1:800 Gusathion 25% w.p.), 1:1000 dimethoate 44% e.c. and omethoate (as 1:1000 Folimate 50% e.c.) afforded 98.8, 99.4 and 98.85% control, respectively, of crawlers, and 28.36, 44.48 and 31.73% control of nymphs and adults.