Abstract The scale mealybug, Diaspis echinocacti (Bouché, 1833) (Hemiptera: Diaspididae), is one of the main pests cactus pear in Brazil. objective was to study biological aspects D. at constant temperatures 25, 28, 30, 33 and 35 °C with relative humidity 60 ± 10% photoperiod 12 hours laboratory on cultivar, “Orelha de Elefante Mexicana”, Opuntia stricta [Haw.] Haw. development period (22 days)...

A survey was carried out at Bandirippuwa Estate, Kir imetiyana Estate and at Isolated Seed Garden, Rajakadaluwa for the pests of coconut inflorescence and developing fruits. The mite, Dolichotetranychus sp. (Tenuipalpidae) which lives beneath the perianth and feeds on the epicarp, causes considerable damage to the developing fruit. Bi-monthly observations on the intensity of infestation of nuts...