Hello,It sound like rose balding ,which usually occur when you have a hot sunny day come right on the heels of a rainy day.It doesn't hurt the plant itself and theres not much you can do about it just wait for more blooms to grow back .Now for the Tiny holes.Flea beetles are most likely cause for this and they are hard to see because the are the size of a speck pepper and the color,is a shimmering brown.They will jump when you shake or touch the plant and even when they do jump it is hard to see them so you will want to examine the plant very close before touching it so that you have chance of seeing the before they get away.I use pepper spray about 5 days out of the week to keep them from damaging the plant.
Hope this helps .
2007-06-19 11:41:14
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answer #1
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answered by Corance C 1
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Rose bushes are a beautiful addition to the garden or landscape, adding a touch of color and romance wherever they go. Still, rose bushes are susceptible to many of nature's foils, and occasionally the homeowner may be faced with a rose bush that will not bloom. This happens for a number of reasons, not enough fertilizer - one of the main reasons rose bushes will not bloom is a lack of nutrient content in their diets. Not winterized - rose bushes sometimes have trouble with colder weather and can die if exposed to freezing temperatures without protection. No sun - of course, if the rose bush does not get enough sun, flowers will not bloom. The sun provides the energy for photosynthesis, a process that gives the plant its power. Infection - Disease and infections such as brown spot and powdery fungus can ruin a rose bush's chance for a bloom during the growth season. This is because all energy is being allotted to fight the disease rather than develop flowers. Treat your rosebush by removing infected areas and spray non-toxic fungicide if necessary.
2016-05-20 00:20:14
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answer #2
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answered by ? 3
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There's several hard to detect pests that can be eating your rose bush. When attacking the problem, remember that even "safest" organic pesticides like Insecticidal soap, should not be used in full sun or high temperatures because that's when they can burn or stress plants. Same thing goes for spraying agricultural oils only when plants are in domancy (immediately after pruning in spring and again in late fall when the leaves drop).
Rose aphids are almost invisible & go after the buds, sucking the life out of the plant. Knock them off with a strong spray of water & use baby shampoo or mild dish soap spray. The recommended dilution rate is 1 oz. dish soap to 1 gallon of water .
Antidote for Rose Aphid
1 orange peel, coarsely chopped
1 tbsp. baby shampoo or mild dish detergent
2 cups water
blend on high speed for 10-15 seconds. Strain into coffee filter, & pour liquid into handheld sprayer. Hose down bushes to knock off aphids. Then mist spray the plants.
Earwigs: If you see signs of chewing on your rose blooms and young leaves, you may have earwigs. They are a large and soft-bodied yellowish-brown insect with a pair of curved pincers. They hide during the day and come out at night to climb into your rose blooms and feed. Use traps such as corrugated cardboard; rolled up newspapers; small cans with openings punctured in the ends can be collected in the morning & the earwigs disposed of.
Galic spray is great for getting rid of slugs, cutworms, wireworms, & whiteflies. Blend well 1garlic bulb & 1 onion add 1Tbsp cayenne pepper & 1 quart water. Steep ingredients for 1 hr, then strain & add 1 Tbsp dish soap and your non-toxic spray is ready to use.
Sawflies often feed on the undersides of leaves. Horticultural oil, insecticidal soap and azadiractin (sometimes called neem), are low-toxicity biorational insecticides.
Mites are tiny, scarcely visible without magnification. Spray infested bushes in the early morning with a forceful water spray to knock mites from leaf undersides. If that doesn't do the job, spray the mites with insecticidal soap( derived from organic soaps like Castile soap). "The usual recipe is about 2-3 drops of castile soap for every quart of water." * Or ...try using 1 oz mild dish soap or baby shampoo to a gallon of water solution first & you should also get rid of the aphids too.
2007-06-19 12:32:03
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answer #3
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answered by ANGEL 7
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Tiny pin holes sounds like beetles, or rose slugs. Get a yellow sticky trap and hang it in the shrub. Check to see what has gotten caught.
beetle ID sitehttp://www.uga.edu/vegetable/beetles.html
http://www.sactorose.org/rosebug/irosepests.htm
http://www.ent.iastate.edu/imagegal/coleoptera/fleabeetle/fleabeetlesonleaf.html
http://www.ent.iastate.edu/imagegal/coleoptera/
http://bugguide.net/node/view/41013/bgimage
Rose slug damage photo http://www.sactorose.org/ipm/17hymenops/17roseslug-bristly-dam2.jpg
Rose leaf hopper damage
http://www.sactorose.org/ipm/11homops/11leafhopper-dam.jpg
Try fresh catnip steeped in water and sprinkled on plants to drive away flea beetles. Also rue will deter flea beetles and grows well with roses.
Organic pest control; Fertilome product is called Borer, Bagworm, Leafminer, Tent Caterpillar Spray. It contains Spinosad, a biological pesticide, that is reported to be as safe as Bt, but with longer lasting results. It is said to work on thrips but not aphids.
http://www.extension.umn.edu/distribution/horticulture/DG0704.html
Neem oil is a pesticide, miticide, fungicide that works well on roses but will kill beneficial insects as well as pests.
Dropping flowers but not leaves is new to me. Rose leaf drop can be caused by a number of reasons; lack of water, disease or insects feeding on roots, excess water if the plant is growing in a container, slow draining soil or inadequate light. This can be accompanied by flower drop if in bloom.
Rosebud damage is usually borers or chafers. This can cause buds to not open but I have never heard of it causing flowers to fall.
Hot weather can shorten the flowers life as it stresses the plant especially if the petals are very thin. Some roses have more substance than others.
Do not use borax unless you know you have a boron (B) deficiency in your soil. It is very rare unless you have highly weathered sandy soil of an igneous (granite) or volcanic origin. If needed it is applied at 1 oz/yd². This is a micronutrient not a major like N-P-K.
2007-06-19 12:14:10
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answer #4
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answered by gardengallivant 7
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mix together in a watering can-- a few squirts of ivory dishsoap, a few spoonsfull of borax & fill it with water. pour this all over your rose bush. repeat every 11 days or so. Last year something totally stripped all the leaves off my rose bushes. once I started pouring this solution over them, they recovered very nicely. grew all new leaves & bloomed again
2007-06-19 12:10:30
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answer #5
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answered by cheezy 6
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