Seasonal occurrence of mango psyllid and the experiments of control.
Lee H. S., Wen H. C.
Author Affiliation: Division of Plant Protection, Fengshan Tropical Horticultural Experiment Station, Taiwan Agricultural Research Institute, Fengshan City, Kaohsiung Hsien, Taiwan.
Journal of Agricultural Research of China 29 : 219-224
Abstract : Studies were carried out in Taiwan on the biology and control of Pauropsylla nigra D. L. Crawford (Microceropsylla nigra) on mango. Nymphs damaged the leaves by feeding on their sap and exuding sticky white droplets onto their surfaces (which resulted in the development of sooty mould in moist conditions). In southern Taiwan, the psyllid occurred throughout the year except spring. Percentage damage reached peaks from May to July and from October to January. Damage was caused only to new leaves, and the incidence of the pest was related to temperature and the condition of the tree. Although eggs were laid on both surfaces of leaves, the lower surface was preferred. Egg density was highest in November, reaching 90 and 177/10 cm2 on the upper and lower surfaces, respectively. Application of four 0.05% sprays of formothion (Anthio) at 10-day intervals during the period when new shoots were appearing gave effective control of the psyllid.