Fruit tree pests
Brown Marmorated Stink Bug (Halymorpha halys, Stål)
Family: Pentatomidae (Stink bugs)
Order: Hemiptera
▶Scientific name: Halyomorpha halys (Stål)
▶Size: Body length 14-18mm
▶Hosts: Apple, soybean, jujube, rice, chili pepper, citrus, and
many other plants
▶Distribution: Korea, China, Japan, Taiwan, North America, etc.
The body is dark brown with irregular yellowish-brown or reddish-brown markings. The underside is yellowish-brown or gray-yellow with dark brown patterns. The antennae show lighter coloration at both ends of the 4th segment and at the base of the 5th segment. The pronotum is broad, rounded, and protruding, with four yellowish spots across the front. The base of the scutellum has yellowish markings at both ends. The abdomen extends broadly beyond the outer margin of the forewings, with alternating black and yellowish markings on each segment.
This pest pierces fruits or leaves with its proboscis to suck sap, causing significant damage, especially to soybeans and apples in early autumn. It has 1-2 generations per year. In early June, females lay about 30 eggs at a time. The eggs are about 1.2 mm in diameter, with dark brown rings.
Nymphs are dark brown, about 14 mm long, rounded, and flattened. Adults move to overwintering sites in October-November, hiding under old tree bark.