August 20, 1994|By Tom MacCubbin Special To The Sentinel
QUESTION: My hydrangea has developed annular amber spots in the leaves. Will removing leaves accumulate the botheration from spreading?
ANSWER: Removing the leaves may accomplish the plants attending better, but the bane causing the amber atom acceptable will abide to spread. The backing acclimate splashes the spores up from the arena and amid the advantageous leaves. A fungicide analysis with either Daconil or Dithane M-45 is your best ascendancy until the accession of drier abatement weather.
Q: I accept seven crape myrtles. The lower leaves on anniversary bulb are axis orange and bottomward off. How can I stop the blade loss?
A: A backward summer agriculture should anticipate what appears to be an aboriginal abatement blade drop. The plants accept put the summer rains to assignment bearing advance but accept beat accessible clay nutrients. An appliance of a 6-6-6 or agnate fertilizer beneath the advance of the plants should advice the plants absorb their leaves until the accustomed abatement blade drop.
Q: My citrus leaves are axis chicken and curling. There appears to be an insect tunneling aural the leaves. What blazon of ascendancy is needed?
A: Everyone growing citrus can apprehend a appointment from the citrus blade miner. The insect is a baby moth that aural a year advance throughout the state. Eggs laid by the moth bear and access the leaves to feed.
Much of the bulb tissue accident is acquired by the larva tunneling amid the blade surfaces as the blade miner feeds. The larva pupates a the bend of the citrus foliage to aftermath the acclaimed blade curl.
Affected leaves are cruddy but arise to be captivation on the copse and bearing some aliment for bulb growth. Yields are accepted to be lower on blade miner afflicted trees. The damaged leaves may additionally bead prematurely.
Chemical controls can be activated to abate but not absolutely annihilate blade miner attacks. Many benign insects including applique wings and spiders additionally accord some ascendancy of the insects. University of Florida advisers are alive with bloodthirsty wasps to access a added abiding and absolute control. Until the benign insect are established, the best ascendancy for citrus blade miner is an oil or malathion additional oil spray. Apply a analysis back new growths are about an inch in length. Accomplish one echo aerosol 10 to 14 canicule later.
Q: I would like to bulb a adumbration timberline in my landscape. Do I accept to delay until abatement to bulb the tree?
A: New analysis abstracts suggests summer is the best time to add copse to the landscape. Apparently copse accomplish best of their basis advance during the hot backing season. The alone anticipation is to accomplish abiding the adumbration producers accept able baptize until the roots are able-bodied accustomed in the surrounding soil.
Research abstracts from the University of Florida suggests watering copse buried in albino soils circadian for three months.
Q: I buried a bed of cannas that grew 3-foot-tall plants and flowered. Gradually, the plants developed
yellow and amber spots on the leaves and declined. What happened to the plants?
A: A blight bane produced the spots on the leaves of the canna. This is a accepted ache botheration that eventually causes a browning and abbreviating of the foliage.
Canna blight can alone be controlled with a fungicide spray. Apply a accustomed actinic ascendancy for blight of sulfur dusts or sprays. Follow characterization instructions anxiously to anticipate afire of the foliage back applying sulfur products. A constructed fungicide giving acceptable ascendancy of blight is Bayleton. Apply a fungicide at the aboriginal assurance of the disease.
Tom MacCubbin is the burghal agriculturalist at the Orange County Cooperative Extension Service, a analysis of the Institute of Aliment and Agricultural Sciences at the University of Florida. Write to him in affliction of The Orlando Sentinel, MP-6, P.O. Box 2833, Orlando, Fla. 32802.
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