Vigilante

Vigilante is an agricultural insecticide brand used in both dairy and beef cattle production. The product is administered as an oral bolus, typically through a balling gun, rather than being applied directly to the animal or sprayed across a pasture. Its active ingredient is diflubenzuron, an insect growth regulator that interferes with chitin formation. By disrupting larval development and insect reproduction, the treatment is intended to reduce fly populations associated with cattle operations. The product is generally described as a 50-gram bolus containing 9.7% diflubenzuron. Its principal targets are horn flies and face flies, two common cattle pests that can cause irritation and stress and may affect livestock management. Reported protection or population-reduction effects last for approximately 10 to 16 weeks, although practical results depend on pest pressure, animal management, environmental conditions, and the presence of other control measures. Vigilante has historical importance in agricultural pest control because it was marketed as the first larvicide delivered in bolus form. This format provided a systemic or internally delivered approach to fly control, complementing more conventional external measures such as insecticidal ear tags, backrubbers, and periodic spraying. The product was therefore positioned as one component of a broader integrated pest-management program rather than as a complete substitute for all other fly-control practices. The brand was originally produced by American Cyanamid. Following the breakup of that company, manufacturing responsibility passed to Uniroyal Chemical and later to Chemtura. The available reference material does not establish the product's current manufacturer, owner, commercial availability, or official website. Its documented identity is consequently best understood as a historically significant cattle-insecticide brand whose present market status requires verification.

Vigilante was developed as an agricultural insecticide for cattle producers seeking to reduce fly populations without relying exclusively on repeated topical applications or environmental spraying. Its distinctive delivery method was a bolus administered orally with a balling gun. The product used diflubenzuron, an insect growth regulator that affects the formation of chitin, a structural material required by many insects during development. This mode of action enabled Vigilante to function as a larvicide and to interfere with the reproduction and maturation of target flies. The brand was originally produced by American Cyanamid. It is identified as the first larvicide marketed in bolus form, making its delivery system a notable part of its historical significance. Rather than presenting the product solely as a conventional insecticide, the bolus format integrated pest control into routine cattle handling and provided a longer-duration approach to managing fly pressure. Vigilante was used with both dairy and beef cattle. Its primary targets were horn flies and face flies, pests that commonly affect cattle operations. Available descriptions indicate that the treatment could reduce these populations for approximately 10 to 16 weeks. The duration was not an absolute guarantee of uniform control, since effectiveness could vary with local conditions, pest levels, animal management, and the use of complementary control methods. After American Cyanamid was broken up, the brand's manufacturing history continued under Uniroyal Chemical and subsequently Chemtura. The available reference does not provide dates for these ownership or manufacturing transitions, nor does it identify a current producer. It also does not establish whether Vigilante remains actively marketed, in which countries it is currently registered, or whether its formulation and labeling have changed. The recommended use model placed Vigilante within integrated pest management. Other measures mentioned in connection with cattle fly control include insecticidal ear tags, backrubbers, and periodic spraying. This approach recognizes that fly-control products work most reliably when combined with husbandry and monitoring practices, and that reliance on a single treatment can reduce effectiveness over time. Because the available source material is limited and does not document current regulatory status, present ownership, or commercial distribution, the brand's contemporary status remains uncertain.

A long-duration cattle fly-control treatment delivered as an oral bolus and intended for use within an integrated pest-management program.

• Agricultural insecticide

  Vigilante cattle bolus

  A 50-gram oral bolus used in dairy and beef cattle to reduce horn flies and face flies. The documented formulation contains 9.7% diflubenzuron, an insect growth regulator that disrupts chitin formation and prevents insects from completing development and reproducing. It is administered with a balling gun and is reported to provide approximately 10 to 16 weeks of fly-population reduction. The product is intended to complement, rather than replace, other integrated fly-control methods.

1. 1Vigilante (insecticide)en.wikipedia.org