Three beautiful new roses, a pure white hybrid tea named Honor, a red and white grandiflora named Love and a salmon-pink floribunda named Cherish, are all-America award winners for 1980.

All three were bred by William Wariner, Jackson & Perkins research director. Never before in the 40-year history of All-America Rose Selections have three new hybrid tea roses produced by the same hybridizer taken all of the AARS awards for the year.

Honor has also received six other awards from all over the world. The bush is vigorous, mildew resistant, and the 4- to 5-inch blooms open well throughout the season.

Love rated high in rose trials in Monza, Rome, Madrid and Japan and also won the Gold Medal of the City of Portland, Ore. It blooms continuously throughout the growing season providing long-stem blooms for cutting. The flowers are brilliant red with contrasting silvery-white petal reverses, have a delicate, spicy fragrance, and the bush is resistant to mildew.

Cherish won the Silver Medal at the Bagatelle Rose Trials, in France, has form, color, fragrance on a plant resistant to mildew, and has the distinction of being a rose that produces hybrid tea flowers on a floribunda bush.

The new roses will be growing at many of the public rose gardens throughout the country this summer and will be available for purchase next spring.

It is possible to grow some nice roses around the home with very little effort. On the other hand, one can take rose-growing so seriously that it becomes a burden mentally, physically and economically.

Some gardeners actually love their plants to death. They heap too much fertilizer on the soil, prune plants so often, or try different disinfectants or fungicides in trying for superlative flowers that they seriously weaken the plants.

The two worst diseases of roses are blackspot and powdery mildew. If your roses become infected with either of these diseases, there is no choice but to spray them; either will spoil the beauty of the flowers and cause serious damage to the plants.

Blackspot causes small round black spots on the leaves, most of them on the upper side. The entire leaf then turns yellow and drops off.

Premature loss of foliage causes weakening of the plant and makes it more difficult for it to survive winter weather.

The two-celled spores of the blackspot fungus are spread over short distances in drops of water, by wind, and on passing animals. The spores must be wet before they will germinate. They germinate best at 79 degrees F., and not at all as low as 55 or above 91.

The spores of the powdery mildew fungus germinate best when the relative humidity ranges between 95 and 99 percent. There is no germination below 75 percent relative humidity and germination is poor between 75 and 95 percent, at 100 percent, and in standing water. The range of temperatures which is best for both germination of the spores and subsequent infection is 65 through 75 degrees.

Benlate is rated as one of the best chemicals for control of both blackspot and powdery milde w. Smaller amounts are required for mixing, and a spray properly applied may be effective for a longer period of time.

Daconil 2787 is also rated as good for both blackspot and powdery mildew. Manzate, phaltan and captan can # provide effective control of blackspot. Phaltan is rated as having some value for protection against mildew infection.

Acti-Dione PM is rated as very effective for control of powdery mildew. It not only protects a plant from infection but also can eradicate an infection once it occurs. Pipron and Parnon also are effective for mildew control.

In almost every instance a fungicide prevents a potential infection rather than cures an established one and for absolute protection all aerial shoots must be covered at all times. This cannot be achieved.

In all cases, all of the directions on the label should be read and followed closely. When mixing the spray and applying it, keep it agitated so that it is well-mixed, which is necessary if it is to be effective. CAPTION: Pictures 1 and 2, All-America rose winners for 1980: Love (left) and Honor.