Hypoderma lineatum

(Villers, 1789)

Common Cattle Grub, Ox Warble Fly

lineatum is a parasitic in the , commonly known as the common . emerge from in early May, approximately one month before the related H. bovis. Females oviposit on cattle during sunny, calm weather from late May through early September, showing a preference for open areas and avoiding water and . First- penetrate the 's skin and migrate to the gullet, where they develop for an average of 42.5 days before moving to subcutaneous tissues of the back. The causes significant to cattle through hide degradation, reduced milk yield, and irritation during adult activity. Unlike H. bovis, H. lineatum does not terrify cattle during oviposition; animals typically show little uneasiness.

Hypoderma lineatum f by Maurice T. James, USDA. Used under a Public domain license.

The Cattle grubs or ox warbles, their biologies and suggestions for control (1369) (20398484400) by Bishopp, F. C. (Fred Corry), 1884-1970. Used under a No restrictions license.

The Cattle grubs or ox warbles, their biologies and suggestions for control (1369) (20577474762) by Bishopp, F. C. (Fred Corry), 1884-1970. Used under a No restrictions license.

Pronunciation

How to pronounce Hypoderma lineatum: //haɪpoʊˈdɜːrmə lɪˈniːətəm//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

are large, resembling or bumblebees. H. lineatum can be distinguished from H. bovis by its earlier seasonal activity ( in early May versus June) and less disturbing effect on cattle during . in the final are found in subcutaneous tissues of the back, creating characteristic or lumps. The shows distinct topographical patterns of , with lower intensity on upland pastures compared to lowland farms.

Images

Habitat

Associated with cattle in agricultural and pastoral settings. prefer open, sunny areas for and tend to avoid the vicinity of water and . Upland pastures generally experience lower rates than lowland farms.

Distribution

Northern Hemisphere, including Britain (particularly South Wales), Europe, North America, and parts of Asia. Distribution records include Japan, Norway, Sweden (irregular), and Hawaii.

Seasonality

emerge from in early May. period extends from late May to early September during sunny, calm weather. spend approximately 42.5 days in subcutaneous tissues before departing to pupate.

Host Associations

cattle - primary develop in subcutaneous tissues; oviposit on legs and flanks
Shorthorn heifer - documented Recorded case with 152 on single animal

Life Cycle

are deposited on cattle during sunny conditions. First- penetrate the skin and migrate to the gullet, possibly selecting this site for freer oxygen supply and loose areolar tissue. Larvae assume a horizontal position under the hide, minimizing effects of skin movement. After developing in the gullet region, larvae move to subcutaneous tissues of the back where they spend an average of 42.5 days. Larvae depart to pupate earlier than previously assumed in some regions—over 20% pupating before March 28th in South Wales studies versus 1.4% in Worcestershire. occurs in soil.

Behavior

persistently attempt to oviposit on cattle during suitable weather conditions. Unlike H. bovis, H. lineatum does not cause terror in cattle; animals show little uneasiness during . Adults avoid water and , concentrating activity in open, sunny areas.

Ecological Role

Significant economic pest of cattle. Over 80% of surveyed cattle harbored of varying intensity. Causes hide damage, reduced milk yield, and irritation. Infestation intensity correlates with topographical conditions and host age, with cattle under three years carrying heavier infestations than older animals under identical conditions.

Human Relevance

Major veterinary pest causing substantial economic losses in cattle production through hide degradation and milk yield reduction. Subject to extensive control research including trials. sprays applied to legs and flanks during period showed promise, though DDT and benzene hexachloride proved ineffective against final . Potential for integrated management strategies including sterile male-release technique.

Similar Taxa

Hypoderma bovisCo-occurring ; distinguished by later (June versus May), greater disturbance to cattle during , and different seasonal activity patterns. H. bovis inspires terror in cattle while H. lineatum does not.