41. It has been said that over 3.2 million litres and kilograms of chemical defoliants were sprayed during that time. 42. Agent Orange, a chemical defoliant , contained a toxic byproduct, dioxin, that veterans have blamed for serious health problems. 43. Washington and Hanoi have been talking about an agreement to allow the two countries to share research on effects of the defoliants . 44. The contaminant used in Agent Orange, a defoliant sprayed during the Vietnam War, includes the most toxic form of dioxin. 45. The FTC ordered the company to sell off two insecticide products, a herbicide used on spring wheat and a cotton defoliant . 46. About 55 percent of the defoliant was Agent Orange _ nicknamed for the color of the identification band on its storage containers. 47. In 1901, studies of the defoliant effect of leaking gas pipes led to the discovery that ethylene is a plant hormone. 48. Hercules Inc . lost a fight to make the federal government pay for lawsuit damages to veterans injured by the defoliant Agent Orange. 49. Mowing is hopeless; chemical defoliants cost too much or draw criticism; neither fire nor flood eradicates the milky-sap plant. 50. It contains a super-defoliant that will shrivel anything within a 500-mile radius if it heats up beyond 50 degrees.
