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GREEN-Seeds.com
vegetables & herbs
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FARMER'S BOOKSHELF
An
information system of crops in Hawaii
Department of Horticulture
University of Hawaii at Manoa
CARROT
Climatic Requirements
Carrots
can be grown the year around in Hawaii although the best quality roots
are produced during the cooler months. Carrots do best under cool growing
conditions at temperatures between 60F. and 70F. Temperatures over 75F.
tend to produce shorter, light er colored roots with strong flavor.
Carrots grown in the warmer lowlands usually have a lighter root color
and shorter root with a stronger flavor than the same variety grown
at higher elevations.
Cultivars
Varieties
The
Nantes strains are the best from the standpoint of quality. Long-rooted
varieties develop poor, misshapen roots. Chantenay and Danvers Half-Long
strains yield heavily but the roots are not of the best quality.
Seed Availability
Seeds
of carrots are usually available on seed racks in local garden shops,
from local seed stores, and in all Mainland seed catalogues.
Culture
Irrigation & Cultivation
Give
the crop a steady supply of water. Over irrigation may produce light-colored
roots and enlarged lenticels which give carrots a rough appearance.
Prolonged periods of drought, followed by irrigation, may cause growth
cracks on roots. Cultivate wheneve r necessary. Carrots are sensitive
to weed competition, so start weeding as soon as weeds emerge.
Disease Control
 Early blight and late
blight are the two most common diseases of carrots. Numerous spots appear
as circles on the leaves. A serious outbreak of blight may cause withering
of the whole top of the carrot. The blights can be controlled by weekly
spraying wit h copper fungicide, maneb or zineb. Blights become serious
especially during wet weather.
Rootknot nematode
is a serious soil-borne pest in carrots. Nematodes will cause galling
and deformed roots. Nematodes may be controlled by using pretreatment
with nematicides.
When applying insecticides,
fungicides or nematicides be sure to accurately read and follow directions
on the label.
Fertilizers
Soil Management & Fertilization
Carrots
grow well in loose, deep soil, free from clods, stones, and trash. The
soil should be well drained, free from nematodes, and have a pH of 5.7
to 7.0. If manure is used apply it several weeks in advance since fresh
manure or commercial fertilizer p laced too near the roots will cause
deformed or forked roots. Apply garden fertilizer such as 10-30-10 at
the rate of 1 l/2 to 2 pounds per 100 square feet. Supply the fertilizer
in two applications -- one-half at time of seeding and the other half
four w eeks later.
Harvesting
The carrots should
be harvested 4 months after planting. Carrots harvested after 4 months
become woody and tough. Insect Control
Most common insect
pests on carrots are mealy-bugs, aphids, cutworms and wireworms. Vegetable
weevil may become troublesome at higher elevations. All these pests can
be controlled to some degree with applications of malathion, diazinon
or carbaryl (Sevin).
Planting
One of the greatest
problems in growing carrots is to get a good stand of plants. The seeds
are small and slow and irregular to germinate. The seedlings are delicate.
Few can emerge through a crusty soil.
Plant carrot seeds
1/4 inch deep in heavy soils, and 1/2 inch deep in light soils. Scatter
the seeds lightly and sparsely over a strip 3 to 4 inches wide, with the
strips spaced 12 to 15 inches apart. Thick stands must be hand thinned
to give roots enough room to expand normally. Spacing between plants should
be 2 to 4 inches.
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Green Co., Ltd.
299K7 SONG GIONG RESIDENTIAL QUARTER, NGUYEN THI DINH ST., WARD AN PHU, DISTRICT 2, HO CHI MINH CITY, VIETNAM
Tel : (84.8) 54026784/86/87/88 - FAX : (84.8) 54026790 - Mobile : (84)(0)908002930 - DIRECT PHONE LINE : + (84)1696988825
Email: GreenSeeds@Green-Genetics.coms.com
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