A new garden type Chrysanthemum plant named CIFZ0075 particularly distinguished by its medium to large size plant with round mound plant habit, a medium size decorative flower (2.0 inch), yellow flower color and a natural season response of early September.

A new garden type Chrysanthemum plant named CIFZ0079 particularly distinguished by its medium size plant with round sphere plant habit, a medium size decorative flower (1.75 inch), creamy white flower color with a yellow colored center and a natural season response late September.

A new and distinct cultivar of Chrysanthemum plant named G21POS04YE, characterized by its upright, outwardly spreading and uniformly rounded plant habit; moderately vigorous growth habit; freely branching habit; dense and full plant habit; flexible stems; dark green-colored leaves; uniform and freely flowering habit; long flowering period; spider decorative-type inflorescences with quilled ray florets that are bright yellow in color; and excellent garden performance.

A new and distinct cultivar of Chrysanthemum plant named DLFALLI5, characterized by its upright plant habit; vigorous growth habit; freely branching habit; dark green-colored leaves; uniform and freely flowering habit; strong upright flowering stems with numerous inflorescences; pompom-type inflorescences with yellow green-colored ray florets; relative tolerance to low production temperatures.

A new and distinct cultivar of Chrysanthemum plant named DLFHED3, characterized by its upright plant habit; vigorous growth habit; freely branching habit; dark green-colored leaves; uniform and freely flowering habit; strong upright flowering stems with numerous inflorescences; spider-type inflorescences with yellow green-colored ray florets that become red purple in color with development giving a bi-colored appearance; and relative resistance to Fusarium oxysporum f. sp. chrysanthemi and Puccinia horiana strain PhNL1.

A new and distinct cultivar of Chrysanthemum plant named DLFSOLE2, characterized by its upright plant habit; vigorous growth habit; large dark green-colored leaves; uniform flowering habit; strong upright flowering stems typically grown as a single-stem (disbudded) cut flower; decorative-type inflorescences with bright yellow-colored ray florets; and relative resistance to Fusarium oxysporum f. sp. chrysanthemi and Puccinia horiana strain PhNL1.

A new and distinct cultivar of Chrysanthemum plant named DLFZEMB5, characterized by its upright plant habit; vigorous growth habit; large dark green-colored leaves; uniform flowering habit; strong upright flowering stems typically grown as a single-stem (disbudded) cut flower; decorative-type inflorescences with light yellow green and yellow green bi-colored ray florets; and relative resistance to Fusarium oxysporum f. sp. chrysanthemi.

A new and distinct cultivar of Chrysanthemum plant named DLFROSY3, characterized by its upright plant habit; vigorous growth habit; dark green-colored leaves; uniform flowering habit; strong upright flowering stems typically grown as a single-stem (disbudded) cut flower; large decorative-type inflorescences with light purple-colored ray florets; and relative resistance to Fusarium oxysporum f. sp. chrysanthemi.

A new and distinct cultivar of Chrysanthemum plant named DLFGAVI7, characterized by its upright plant habit; vigorous growth habit; dark green-colored leaves; uniform flowering habit; strong upright flowering stems typically grown as a single-stem (disbudded) cut flower; decorative-type inflorescences with dark red purple-colored ray florets; and relative resistance to Fusarium oxysporum f. sp. chrysanthemi, Verticillium dahliae and Puccinia horiana strain PhNL1.

Described are compositions and methods for inhibiting polymerization of a monomer (e.g., styrene) composition a quinone methide polymerization retarder and an oxygen-containing amine compound that is a tertiary amine or hydroxylamine. In a mixture, the oxygen-containing amine compound improves the efficacy of the quinone methide polymerization retarder and provides greater antipolymerant activity. In turn, the mixture reduces or prevents apparatus fouling and improves the purity of monomer streams.