Tomato seedling turns yellow: reasons for what to do.If the leaves of tomato seedlings turn yellow: transplant, feed …what else?

Пт, 28 апр 2017 Автор: Евгений
Grammatikati

What can upset novice gardeners and “experienced” gardeners
equally strong? Tomato seedling turns yellow! Why and what
do?

Yes. Very often it happens. Leaves of bushes
tomatoes begin to turn yellow both on the windowsill and in the greenhouse. it
without a doubt, plants lack something.

To sow tomatoes for seedlings should be in certain periods, if the seedlings
outgrowing – the problems begin.

Contents

Why does leaf color change in seedlings?

The main element of the green plant tissue is chlorophyll. Being
in the cells of the leaves, it under the influence of sunlight turns
carbon dioxide and water into organic matter. Plant yellowing
suggests that chlorophyll synthesis is disrupted in one of many
reasons. it заболевание растений называется хлороз, причин по каким
he can manifest a lot.

Most often occurs as a result of violations of the nutritional regime
roots. it происходит при их переохлаждении или физических
damage. If the transplant has caused root damage
system, then the plants turn yellow leaves, it is necessary
wait for the seedling roots to recover and chlorosis will disappear. With
a strong decrease in soil temperature, chlorosis becomes visible on
all plant.

To find out why chlorosis appeared, you need to inspect
tomato leaves. If yellowing affected only the lower (most
old) leaf blades, there may be a shortage of one of them
elements of food. Most often the yellowing of the seedlings speaks of
nitrogen deficiency. In this case, leaf veins take
the bluish-red tint and even small color change
leaves.

Yellowing may occur with a lack of potassium, but in this case
the process may go too far as a result of accumulation in the tissues
ammonia nitrogen resulting in dehydration
vegetative mass and there is a twisting of the leaves, the process
comes to traces of tissue necrosis.

Another reason why tomato seedlings turn yellow may
be a shortage of zinc. itт недостаток можно определить по множеству
small yellow dots on leaf blade. In this case, necrosis
(dying off) of tissue, occurs on the whole leaf, and the result
It becomes noticeable very quickly.

Chlorosis, spreading from the base of the new leaves, and
discoloration of records. If the disc leaf color changes
occurs from yellow green to lemon yellow and even reaching to
Yellow-white shade, says a strong lack of iron. Such
changes occur exclusively on young leaves, on the old
foliage disease does not manifest. In this case, you need to hold
feeding plants with preparations containing iron, seedlings can
recover even a few hours after starting treatment.

Several causes of tomato leaf drying

Tomato seedlings need to swoop in time and properly
keep a close eye on her condition.

Сырость и недостаточное освещение. AT
in most cases, seedlings begin to turn yellow with high humidity
soil or lack of lighting. it чаще происходит в средних и
northern regions, as there, in spring, for plants not
enough sunshine.

Lack of trace elements. If with proper care on the leaves
chlorosis starts anyway – then appreciate how the shade changes
leaves. ATозможно, для рассады не хватает микроэлементов.

Усыхание кончиков листьев рассады. Here can
There are several reasons, first look at the plants that
are nearby, do they have similar signs? If there is
something similar, then the air may be too dry, the situation
You can fix, if next to place, a container of water.

Желтые и белые пятна. it происходит, если
the soil is saline.

Появление пятен на сеянцах. it может
происходить из-за ожогов leaves. Plants grow better on
the sun, but if the seedlings are planted, not accustomed to the sun’s rays,
a strong stream of sunlight can burn the leaves. On the beds
well-lit by the sun is necessary for the first time to shade
seedlings.

Заболевание септориозом. Appeared on the leaves
off-white spots, says that seedlings are infected by this
disease, it is transmitted through the soil. Spreading disease
at high humidity. The easiest way in this case is to destroy the patient.
seedlings.

Черная ножка. it страшная болезнь для рассады.
Sick seedlings wither and fall, their roots begin to rot near
surface of the soil, dark gradually appears on the stalk
tapered stalk of the affected tissue. To combat black
foot carry out preventive measures.

Отпирание корневой системы. Sometimes you can
увидеть, что на рассаде за одни сутки желтеют и сохнут leaves. AT
In this case, the seedlings cannot be saved; the reason is the death of the root
tomato systems.

How to prevent the spread of most diseases
tomatoes

Не забывайте, что грунт для рассады нельзя сильно
увлажнять
, почву нужно поливать со средней активностью,
let her dry for a little while glaze.

Keep seedlings on a windowsill or in a greenhouse on a sunny
to the side.

With первых признаках болезни рассаду необходимо
save.
It needs to be transplanted with a complete replacement of the soil, roots
it is necessary to completely release from the soil, assess their condition,
they must be white (if the root system of seedlings of a different color
– to save such seedlings does not make sense). And you need to transplant them into a new one.
steamed, treated with drugs for diseases of the soil. Each
Tomato seedling need to pour 20-30 ml of potassium permanganate, after which
plants put the southern window sill or in the southern part of the greenhouse.
Use a breathable soil mixture for transplanting.

ATозможно, во время пересадки рассады tomatoes вы
случайно травмируете их корневую систему. AT этом
If necessary, put it on time in a light shade when seedlings
take root, you can transfer it to a bright place!

With большой засоленности почвы, корни растений
do not absorb moisture, but vice versa – they suck it out of a tomato bush and
excrete it into the ground. The soil can pickle when watering hard
water and with a large amount of fertilizer. With этой
trouble you need to remove a layer of soil 3 cm thick, water the seedlings
distilled or snow (rain) water, then not
несколько недель подкармливать seedlings.

How to detect nutritional deficiencies

Even experienced gardeners do not always know what and how to feed
рассаду tomatoes.

It is often necessary to find out what substances are missing without tests.
сеянцам tomatoes. ATнешние признаки недостатка питательных
items:

Азот. Plate leaves at the edges as it were
burn, the leaf itself quickly turns yellow and dies. To “cure”
tomato seedling, you must produce nitrogen fertilization
fertilizer;

Калий. New leaves become
�“Curly”, more adults leaves turn yellow and die. Help seedlings
possible, if you feed potassium nitrate or potassium sulfate;

Магний. The leaves begin to shrink, turn yellow on
veins and bend, must be treated with a solution of English
magnesium salt or nitrate;

Цинк. On the surface of the leaves are
brown spots are noticeable, they dry out and die. Will help foliar
top dressing with zinc sulfate solution;

Молибден. The surface of the leaves is twisted and
it becomes lighter, the seedlings need to be fed with a solution
ammonium molybdate;

Железо. Листики tomatoes приобретают белый
or yellow-green tint, foliar dressing required
preparations containing iron.

loading...
Like this post? Please share to your friends:
Leave a Reply

;-) :| :x :twisted: :smile: :shock: :sad: :roll: :razz: :oops: :o :mrgreen: :lol: :idea: :grin: :evil: :cry: :cool: :arrow: :???: :?: :!: