Lonicera_wild.html

Lonicera sp (Honeysuckle): Ecology

Habitat: Honeysuckles grow easily in soils of average fertility in full sun or light shade.

Diseases: The Tatarian honeysuckle is more susceptible to honeysuckle witches' broom aphid. First detected in Scott county in 1981, this aphid feeds on the leaves, injecting a toxin that causes a proliferation of small side shoots at the branch ends called a witches' broom. Affected leaves fold around the insect, making infestations difficult to control. Damage is mostly aesthetic, and control includes foliar systemmic insecticides and pruning of the affected branches. Powdery mildew and leaf blights attack the lower leaves of plants in shaded locations and dense plantings.
Distribution: Most species grown in Iowa are species introduced from east and central Asia. The most common species in the state are two introduced Asian shrubby species, the Tatarian honeysuckle (L. tatarica) and the Amur honeysuckle (L. mackii), the first with blunt leaf apices and red fruits, the second with narrowed leaf apices and orange fruits. A general rule-of-thumb is that shrub species with hollow twigs are generally introduced, and those with a solid, whitish pith are native. Vine species with fruits all along the stems are generally introduced and those with flowers or fruit only at the stem tips are native. Both have become naturalized in our woodlands, often forming thickets that exclude native species.

Lonicera sp (Honeysuckle): Ecology
	Habitat: Honeysuckles grow easily in soils of average fertility in full sun or light shade. Diseases: The Tatarian honeysuckle is more susceptible to honeysuckle witches' broom aphid. First detected in Scott county in 1981, this aphid feeds on the leaves, injecting a toxin that causes a proliferation of small side shoots at the branch ends called a witches' broom. Affected leaves fold around the insect, making infestations difficult to control. Damage is mostly aesthetic, and control includes foliar systemmic insecticides and pruning of the affected branches. Powdery mildew and leaf blights attack the lower leaves of plants in shaded locations and dense plantings.	Distribution: Most species grown in Iowa are species introduced from east and central Asia. The most common species in the state are two introduced Asian shrubby species, the Tatarian honeysuckle (L. tatarica) and the Amur honeysuckle (L. mackii), the first with blunt leaf apices and red fruits, the second with narrowed leaf apices and orange fruits. A general rule-of-thumb is that shrub species with hollow twigs are generally introduced, and those with a solid, whitish pith are native. Vine species with fruits all along the stems are generally introduced and those with flowers or fruit only at the stem tips are native. Both have become naturalized in our woodlands, often forming thickets that exclude native species.