After entering March and April, the temperature began to gradually rise, and most of the garden plants began to slowly transition from the leaf spread period to the critical period of growth. However, with the gradual rise of temperature, various diseases, insects and grass pests have also begun to enter the initial stage, endangering the healthy growth of garden plants. Therefore, in April, we must not only provide sufficient nutrients and water for the growing garden plants in a timely manner, but also pay attention to the early prevention and control of diseases, insects and grass pests.
Today, here I will give you a brief summary of some of the key points we need to pay attention to in the process of garden maintenance and management in April, I hope it will be helpful to you!
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1. Replacement and replanting of unspring seedlings.
After entering April, most of the seedlings have sprouted and spread their leaves, and those seedlings that have not germinated normally are often due to various problems transplanted last autumn or frost damage caused by low temperatures in winter and early spring, which caused the death of seedlings.
At this time, we can mark these seedlings that have been judged to be undead through inspection, and then complete the excavation and replacement of these dead seedlings in April.
2. Timely spread the buds of newly planted seedlings.
For seedlings transplanted in early spring, the small buds in the middle and lower end of the main trunk of the seedling should be erased in time to avoid unnecessary nutrient waste and form a nutrient interception, thereby affecting the growth of newly germinated branches and leaves on the canopy.
3. Grasp the opportunity to restore the frost-damaged seedlings or weak growth seedlings in a timely manner.
The picture shows the oleander affected by frost
After entering April, the temperature is basically stable, which is a critical period for the recovery of seedlings. Therefore, for the seedlings that have been frost damaged before and the seedlings with weak growth, you can grasp the critical period of April, rescue and rejuvenation, and the specific operation methods can be checked out in my previous articles:
"After frost damage occurs in seedlings, how to quickly rescue them?" 》
"Last year's transplanted trees, this year's growth is not good, Xiaobian tells you what to do!" 》
4. Gently apply spring fertilizer to save nutrients for the growth of seedlings.
For seedlings that have been transplanted for more than one year, at this time, some organic fertilizers and phosphorus and potassium fertilizers can be applied around the root system of the seedlings, providing certain nutrients for the growth of seedlings, especially some flowering seedlings can apply some pre-flower fertilizer, which can have larger, more colorful flowers and a more durable flowering period.
5. Reasonable watering to promote the healthy growth of seedlings.
In April, the temperature and ground temperature are rising, at this time too much watering, will affect the ground temperature rise, not conducive to the return of seedlings to green; if the watering is too little, it is easy to drought, so that the seedlings appear to be pulled, or even budding phenomenon. Therefore, at this time, watering should master the principle of no drought and no watering, and watering is thorough.
<h1 class="pgc-h-arrow-right" data-track="4" > second, the daily management of the lawn. </h1>
1. Beware of stampede and help the lawn grass germinate quickly.
After entering April, the temperature in most parts of our country has begun to rise, and the lawn grass has begun to sprout and return to green, in order to avoid the damage of the newly sprouted lawn grass, it is necessary to set up a notice board for the area where the lawn is planted in the park and green space to prevent everyone from stepping on it.
2. Reasonable watering and fertilization to promote the rapid return of lawn to greening.
After entering April, most of the turf grass, especially the cold season lawn, has entered a rapid budding and greening period, and the demand for water and nutrients is very high, and it is necessary to water and fertilize the lawn in time to facilitate the rapid rejuvenation of the lawn grass.
When watering, it is necessary to combine the moisture of the soil, and it cannot be watered every day. Fertilization should be based on phosphorus and potassium fertilizer and nitrogen fertilizer, which can not only make the lawn quickly green, but also improve the disease resistance and insect resistance of lawn grass.
3. Pay attention to the prevention and control of lawn grass pests.
In April, not only the temperature rises faster, but also the rain is more, which is a vigorous period of weed germination and growth, during this period, the lawn weeds are still in the juvenile stage, which is the best time for weed control, so it is necessary to remove the weeds in the lawn in time during maintenance.
(1) For warm-season turf such as Bermuda and Manila, it is recommended to use agents such as pyridoxine sulfonylone to prevent it.
(2) For cold-season lawns such as high fescue, early maturing grass, and ryegrass, it is recommended to use spermoxazole grass to control a variety of weeds.
4. Prevention of lawn diseases.
The picture shows lawn rust
The picture shows lawn powdery mildew
After entering April, it is the high incidence of leaf diseases such as lawn grass rust, powdery mildew, powdery mildew, etc., and preventive fungicides such as carbendazim and daisen manganese zinc can be applied in time after each rainfall or when pruning. In the early stage of the disease, phenyleth methylcyclazole, pentrazole and so on can be administered for prevention and treatment.
5. Prevention of lawn insect pests.
The picture shows grubs under the lawn
After entering April, lawn underground pests such as grubs, caddisflies, ground tigers, etc. will also begin to harm, and can be applied in the evening with granular insecticides such as chlorpyrifos, octyl thiophos, diazine phosphorus and other granular insecticides mixed with fine sand for control. The amount of land per mu in the prevention period is about 2 to 4 kg, and the amount per mu of land in the prevention and control period is about 4 to 8 kg, and after application, combined with watering, the liquid penetrates into the soil.
<h1 class="pgc-h-arrow-right" data-track="4" > common pests and diseases in March and April</h1>
April is the initial period of garden plant diseases and insect pests, but also a critical period of prevention and control, this period of timely prevention of various diseases, insects, grass pests, can be bacteria, pests, weeds and other damage to garden plants will be minimized, and reduce the incidence of diseases and insect pests throughout the year.
(1) The main pests that occur in April:
1. Suction pest:
(1) Aphids
The picture shows an aphid
Every year from about March peach aphid, monthly long tube aphid, luan polymorphic aphid, cotton aphid, pine aphid, etc. will begin to harm garden plants, the harm time can last from March to about mid-to-late October, in the control of which we can use imidacloprid, acetamidine and other agents for spraying. It should be noted here that rosaceae plants such as peach trees should use organophosphorus insecticides carefully during the flowering period to prevent drug damage.
(2) Shell insects
Pictured here are the insect shells on an apricot tree
Every spring, the insect shell will begin to harm, the grasshopper, peach borer, etc. start the earliest, the control time of the grasshopper is generally from the first month, and the control time of other ticks is generally from about April.
For ticks that need to climb trees for harm, they can be prevented by applying poisonous rings, and combined with spraying special insecticides such as spirant ethyl esters and chlorpyrifos.
(3) Spotted wax cicada
The picture shows the larvae of the spotted wax cicada
Nymphs of the spotted wax cicada generally begin to hatch around mid-April of each year, and enter the incubation period in May, with adults and nymphs clustering on the leaf backs and young shoots of plants. It can be controlled with agents such as thiamethoxazine when carrying out control.
(4) Reticulum bugs
The picture shows the square-winged reticulated bug
Reticulum bug is a very common sucking pest in the garden, mainly in the form of adult insects and nymphs to harm plant leaves, in the garden mainly harm the tung, rhododendron, camphor and so on. Adults generally begin to become active around mid-April and reach their peak in june and july in the summer. In the prevention and control, imidacloprid, chlorpyrifos and other agents can be used for control.
2. Leaf-eating pests:
(1) Large-leaved boxwood moth, boxwood silk borer, boxwood inchworm
The picture shows the boxwood silk borer
The picture shows the harm of boxwood silk borer to boxwood
These types of leaf-eating pests are mainly harmed by eating the leaves of plants in the form of larvae, mainly harmful to large-leaved boxwood, melon seed boxwood and so on.
Generally, the hazard begins in mid-to-late March, and in late April, it enters the peak period of harm, eating the leaves into holes and missing moments, and when it is serious, the entire leaves of the boxwood can be eaten, resulting in the drying and death of the whole plant. In the prevention and control, it can be controlled with agents such as beetle salt mite nitrile and kung fu thium.
(2) American white moth
Pictured is the larvae of the American white moth
It is usually harmed by eating plant leaf flesh in the form of larvae, and the adult overwintering American white moth begins to feather around mid-April every year. At this time, it can be prevented and treated in the evening with agents such as chlorpyrifos with methylphenidate.
(3) National locust ruler moth
The picture shows the national locust inchworm
The picture shows the harm of the national locust inchworm to the national locust
Mainly harm the national locust, in the form of larvae to harm the leaves and young shoots of the national locust, generally in late April, the first generation of larvae of the national locust ruler moth began to be pest, at this time should seize the best time to apply methylvitamin chlorpyrifos and other pharmaceutical control.
3. Dried moth pests:
(1) Tianniu
Pictured is the larvae of the Celestial Bull
The picture shows the wood chips left behind after the damage of the Celestial Bull
Tianniu mainly overwinters in the form of larvae in the branches of the victim, and then begins to be active and harmful after March of the following year, and enters the peak period of harm in the spring and autumn, mainly endangering poplars, willows, peach trees, cherry blossoms, begonias, etc.
You can use the root buried octyl thion, chlorpyrifos and other granular insecticides for pest prevention in the late March to early April, but once the moth hole or tree root is found to have fresh wood chips or excrement, it is necessary to use the poison signature method, or the trunk spray method and other methods for immediate control, the specific operation method, you can check my previous article "Spring, the initial stage of damage to dried borers, at this time the prevention and control is just in time."
(2) Small beetles
Pictured is the larvae of a small silverfish
The picture shows the harm caused by small beetles to trees
Small beetles mainly harm side cypress, juniper cypress, willow fir, dachshund wood, etc. in the form of larvae, and feed on the branches of adult insects to supplement nutrition, often the branches are hollowed out, broken in the wind, when serious, there are piles of bitten and broken branches under the tree.
Hatching larvae usually appear around mid-April and are harmful to the construction of tunnels in the phloem. Specific prevention and control methods can refer to the prevention and control methods of Tianniu above.
(3) Yang transparent-winged moth
The picture shows the larvae and adults of the Yang-winged moth
Yang through-winged moth mainly in the form of larvae to drill the trunk and top buds of the moth tree for harm, after entering the plant top bud to inhibit the growth of the plant top bud, in vain side branches, the formation of bald shoots; after the moth into the trunk, it will make the victim tissue proliferation to form a nodular gall, resulting in wilting or wind folding.
The transfiguration moth generally begins to feed in April of each year, and can be controlled with agents such as thiamethoxam during control.
4. Underground pests:
The picture shows grubs on a lawn
After entering April, it is the active period of underground pests such as grubs, grubs, ground tigers, etc., and will enter the peak period of harm in May, which is harmful to the lawn and seedlings in the greening period, the specific prevention and control measures can refer to the above on the prevention and control methods of lawn underground pests, you can also view my previous article "Spring, the peak period of lawn underground pest harm, how to control the best effect?" 》。
(2) Common diseases in April
After entering April, the diseases that often occur in garden diseases mainly include: powdery mildew, rust, leaf spot disease, dry rot, glue disease, etc., and are basically in the initial stage of infection, and the prevention and control is relatively simple.
The picture shows powdery mildew of boxwood
For powdery mildew, leaf spot disease, rust, etc., carbendazim, manganese zinc, etc. can be selected in the prevention; triazolone, pentazole or phenoxymethazole can be selected during the prevention and treatment.
The picture shows the dried rot disease of the national locust
For dry rot, glue disease, etc., you can choose methyl tolbucin and the like in the prevention; you can choose copper thirrhilate or copper sulfate during prevention and treatment.
Well, the main points of maintenance in April will be briefly shared with you here today.
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