Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Study of bionomics and control of Parlatoria zizyphus.

Abstract

The biology and control of the diaspidid Parlatoria zizyphus [P. ziziphi], an important pest of citrus in China, was studied in 1980-85. The pest had 3-4 overlapping generations a year, overwintering in the adult stage. The duration of the oviposition period was 79.3-134.8 days. Eggs took a mean of 7.8-11.6 days to hatch, and egg hatchability was 85.7-99.7%. The occurrence of 1st instars peaked in early June, mid-September, late October and early December. Natural enemies comprised the aphelinid parasitoid Aspidiotiphagus citrinus [Encarsia citrina], 2 ectoparasites, the coccinellid predators Telsimia emarginata and Chilocorus kuwanae and the nitidulid predator Cybocephalus nipponicus. The pest was effectively controlled with 40% omethoate, 40.7% Lorsban [chlorpyrifos], 40% Supracide [methidathion], 25% quinalphos, 2.5% PP-321 [lambda-cyhalothrin], 20% Sumicidin [fenvalerate] or 10% Cymbush [cypermethrin].