Southern Green Stink Bug (Nezara viridula) lives in tropical grasslands across Sub-Saharan Africa, Southeast Asia, North America.
Fascinating facts about the Southern Green Stink Bug
- Its range stretches from 45°N to 45°S across the Americas, Africa, Asia, Australasia and Europe, making it a truly global pest. The species is described as cosmopolitan, inhabiting tropical and subtropical regions throughout this latitudinal band. Such a distribution means it can be encountered on many continents and islands where warm climates prevail. Its presence in these zones underpins its status as a widespread agricultural problem.
- Although its precise birthplace is unclear, scientists think it first appeared in Ethiopia's East African region. The bug's strong flight ability and accidental hitch-hiking on human trade routes have carried it far beyond its origin. This dispersal has established populations on every continent within the tropical-subtropical belt. Consequently, it is now a common sight in many far-flung agricultural landscapes.
- When ready to mate, a southern green stink bug generates a 100 Hz vibration with a specialised tymbal, letting it signal any other bug on the same leaf. The vibration travels bi-directionally, enabling partners to locate each other without visual cues. This acoustic cue is produced by fused first and second terga and works only when both insects are on the same plant. The behaviour ensures successful mating encounters in dense foliage.
- In warm summers the bug can squeeze up to four generations into a single year. Each generation progresses through five nymphal instars, each lasting about a week except the final stage which is a day longer. Eggs develop in 5 to 21 days depending on temperature, and the whole egg-to-adult cycle can be as short as 35 days in mid-summer. This rapid turnover lets populations expand quickly when temperatures stay between 22 °C and 27 °C.
- A handful of individuals display a strikingly different hue, being uniformly orange or yellow, sometimes even pink, a form known as f. This morph is extremely rare compared with the predominant green form, which makes up the majority of the population. Less common is a green variant with white or yellowish front margins on the head and thorax (f. torquata), while the very common f. smaragdula is solid green.
Sources
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At a glance
RangeSub-Saharan Africa, Southeast Asia, North America
HabitatTropical grasslands
DietLegumes and fruits
About the Southern Green Stink Bug
In the lush tapestry of tropical landscapes, the Southern Green Stink Bug weaves its way with stealthy precision, its vibrant green carapace glistening like a jewel as it navigates the intricate network of leaves and stems. With a fluid, almost languid movement, it glides across the sun-drenched foliage, its proboscis twitching as it searches for the sweet, sticky nectar that sustains it. As it moves, the stink bug leaves behind a trail of subtle, pungent scent, a potent reminder of its remarkable ability to defend itself against predators with a noxious, protective spray.
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