The American Rose Society, in conjunction with rose
breeders, has established facilities for testing and evaluating
rose cultivars prior to release to the public. Roses are tested
for 2 years under differing soil and climatic conditions in the
United States. The plant material is scored for vigor, hardiness,
disease resistance, foliage, flower production, bud and
flower form, opening and final color, fragrance, overall value
and novelty. There are now 26 test gardens across the United
States consolidated under the name of Official All-America
Rose Selections Test Gardens (AARS). The Renisch Rose
Garden in Topeka’s Gage Park is one of the sites. Selections
are made annually to receive the AARS award in categories
for hybrid tea, floribunda, grandiflora and miniature roses. In
some years, no roses are selected for the award (see Table 1,
listing past winners). Table 2 lists selected cultivars recommended
by 55 consulting rosarians in the central district of the
American Rose Society (the central district includes Kansas).
Senin, 28 April 2008
Insects rose
Insects. Among the insects that attack roses, aphids are the
major problem. The typical aphid is small, soft-bodied, pearshaped
and comes in an assortment of colors—black, green,
pink, red, yellow, lavender, brown or gray. The nymphs may
differ in color from the wingless adults. Damage caused by
aphids is the result of their sucking feeding. All aphids secrete
“honeydew,” a sugary deposit that attracts ants and becomes
the medium for sooty mold growth. The result of the damage
is loss of plant vigor and sometimes stunting and deforming
buds and flowers, and curling or puckering of leaves. One of
the more serious problems associated with the aphid is its role
as a vector for mosaic and other virus diseases. Aphids are
easily controlled with several contact and stomach poison
insecticides.
Other possible insect pests include assorted caterpillars,
rose chaffer, rose curculio, Fuller beetle, spotted cucumber
beetle and bristly rose slug. These all can be controlled with
pesticides. Scales may occur on roses and are best controlled
by pruning out infested canes.
Pruning
angle
1/4” above
healthy bud
major problem. The typical aphid is small, soft-bodied, pearshaped
and comes in an assortment of colors—black, green,
pink, red, yellow, lavender, brown or gray. The nymphs may
differ in color from the wingless adults. Damage caused by
aphids is the result of their sucking feeding. All aphids secrete
“honeydew,” a sugary deposit that attracts ants and becomes
the medium for sooty mold growth. The result of the damage
is loss of plant vigor and sometimes stunting and deforming
buds and flowers, and curling or puckering of leaves. One of
the more serious problems associated with the aphid is its role
as a vector for mosaic and other virus diseases. Aphids are
easily controlled with several contact and stomach poison
insecticides.
Other possible insect pests include assorted caterpillars,
rose chaffer, rose curculio, Fuller beetle, spotted cucumber
beetle and bristly rose slug. These all can be controlled with
pesticides. Scales may occur on roses and are best controlled
by pruning out infested canes.
Pruning
angle
1/4” above
healthy bud
Langganan:
Postingan (Atom)
