August
1. The weeds in various green areas are still heavily breeding, and they have slowed down in the second half of the year, but the proportion of seeded weeds has increased, and weeding cannot be relaxed.
2. Some flowers and shrubs should be properly pruned to ensure the lush autumn shoots.
3. Each green area, especially the following 10 kinds of plants (ginkgo biloba, persimmon tree, cherry blossom, lilac, peach, acacia, elm plum, five-pointed maple, locust, cedar), still need to pay close attention to drainage and dredging to strengthen water permeability.
4, new green space (road) evergreen trees and large-sized tree shade nets do not rush to remove for the time being, August's "three strong" climate (strong radiation, strong light, strong transpiration) is still more obvious, anti-transpiration inhibitors can continue to use.
【Main diseases】
1. Powdery mildew
Targets: Fufang vine, large-leaved boxwood, rose.
Prevention and control: powdery mildew, rust special fungicide powder rust, triazolone, cyanobacterazole, azoxystrobin, etc.
2. Leaf blight
Harmful objects: all kinds of flowers and shrubs, cold lawns.
Prevention and control: zinc manganese, leaf subuszole, allicin fungicide + plant nutrient regulator spray 2-3 times.
3. Putrefaction
Targets: lawns, ground cover grass flowers (petunias, etc.).
Prevention and control: spray nail cream manganese zinc + sodium disfonite + plant growth regulator, spray 2-3 times.
【Main pests】
1. Boxwood curly leaf borer
Host: small-leaved boxwood, melon seed boxwood, bird's tongue boxwood.
Occurrence rules: 3 generations occur in a year, from late July to August (the second generation of larvae in that year). Continued drought, high temperatures after rain will cause more harm.
prevention and cure:
(1) Combined with pruning to remove larvae from sticky leaves;
(2) Spray to kill larvae
Spray insecticides such as methylphenidate, cypermethrin, and kung fumethrin.
2. Locust inchworm
Host: National locust, dragon claw locust (weeping locust)
Occurrence pattern: Occurs 4 generations a year, and pupae overwinter in shallow soil. Adults feather in mid-April, the eggs are laid on the front of the leaves, in flakes. From early May to early October, there are larvae and overlap generations. Generally, the damage is more serious in early to mid-May, mid-to-late June, mid-to-late August, and early to mid-September. Drought and little rain are heavy, even in the cloudy and rainy period, the harm is light, and the larvae are frightened by the suffix silk drooping, so it is also called "hanging ghost".
(1) Medicine to kill larvae
Spraying of malathion, urea, permethrin pesticides, etc.
(2) In winter, in the shallow soil layer under and around the national locust tree, the pupae are dug in the wall cracks, which is very effective in reducing the density of the mouth of the overwintering insects.
4. Purple velvet beetle
Hosts: Hundred Days Red, Pomegranate, Privet
Occurrence rules: August to September is the second generation of nymphs and the peak of pests.
Prevention and control: (1) protection of natural enemies: ladybirds, grasshoppers, aphid wasps, jumping wasps; (2) winter brush or spray Pome 5 degree stone sulfur compound; (3) harmful period of application: root burial octylthion or spray thiazide ketone insecticide + 40% rapid culling.
5. Grass borer
Host: Lawn
Prevention and control: it can be controlled by spraying insecticides such as methylphenidate, cypermethrin, and kung fumethrin.
In addition, red spiders, lawn armyworms, etc. still occur, continue to control, spray avermectin, avida mite, insect mite nitrile and so on.
September
1. Pay attention to the care and management of various types of plants in the garden, especially in the autumn drought period and the late flowering period of flowering plants, corresponding water and fertilizer measures should be taken to lay a good foundation for enhancing the autumn growth potential of plants and the nutrient storage during the dormant period.
2. September is the peak of the occurrence and pest occurrence and pest in the autumn, and should be prevented and controlled in time.
3. Do a good job in greening maintenance and sanitation of parks, roads, squares and construction sites.
1. Lawn spot blight
Symptoms: The lawn appears with wilted patches of different sizes, the grass plants turn green and yellow, the roots, crowns, and necks of the grass plants are black and brown, and the outer cortex of the vascular bundle rots, and the whole plant dies.
Prevention and control methods:
Brassicax + methocene manganese zinc + 90% ethylphosphorus aluminum 500-600 times liquid.
2. Brown spot disease on the lawn (Liku silk nuclear blight)
Symptoms: Infecting the leaves, sheaths and stems of lawn plants, causing leaf rot, sheath rot, stem base rot, and the leaves of a single plant produce 5-50mm long brown fusiform or long strip disease spots, which are blue-gray at first, then black-brown, and when severe, the spots circle the stem. The whole leaf is water-stained and decaying, and the diseased plants are tillered and die. Nearly round dry grass spots of 1-2 m appear on the lawn, and when it is warm and wet, a "smoke ring" appears, and then it becomes green in the center and a dry yellow "frog eye" around it.
Prevention and control: compound phenol sodium + methyl cream ling manganese zinc + 72.2% Pulik water agent 500-800 times liquid spray.
3. Monthly black spot disease
Prevention and control method: spray nail cream ling manganese zinc 500-600 times liquid + 80% ethologin 1500 times liquid.
4. Cherry blossom brown spot disease
Prevention and control method: brassicain + squirter ester + 58% virulence 500 times liquid.
5. Large-leaved boxwood blight
Prevention and control method: compound phenol sodium + allicin 1000 times liquid spray, it is best to take the method of spraying up and down irrigation (blight is generally a soil-borne disease).
1. Apple palm boat moth: commonly known as boat-shaped caterpillar
Larvae hatch from August to October. Pupate in late autumn. The larvae are 5 years old, have cluster pests, spitting silk sagging and suspended animation habits, the insect eats day and night, the amount of food is very large, and it can eat the whole branch or even the whole leaf overnight.
Prevention and control: spraying of urea, malathion.
2. Thorn moth
Host: In addition to the common damage of rosaceae plants, it also harms more than 100 kinds of plants such as tung trees, walnuts, jujube trees, persimmon trees, pomegranates, white wax, mulberry trees and so on.
Regularity: This insect occurs 1 generation a year, the adult insects feather in July, the larvae hatch in August and October, focusing on the leaves, the initial is reticulated, and then the lack of carvings and holes, until the leaves are eaten.
Prevention and control: (1) Spray to kill young urea. (2) Protect natural enemies, bees, broad-shouldered small peaks, hunting bugs, and praying mantises.
3. Aromatic wood beetle moth
Control: Since the larvae climb out of the tree hole in late September and enter the soil to make a cocoon for wintering, a circle of octyl thion or chlorpyrifos can be sprinkled on the soil surface at the base of the trunk to poison the larvae into the soil (but pay attention to environmental safety, do not let poultry, pigeons, pets get involved in poisoning).
4. Japanese turtle wax bug
Host: Fa tong, large-leaf boxwood, etc
Prevention: Striazine ketone + 40% rapid culling 800-1000 times liquid.
5. Others
(1) Various Tianniu larvae
September is another peak of most of the Tianniu larvae's infestation, and there are generally two types of damage:
Shallow layers are harmful - the larvae hatched in the same year, drilling moths in the phloem as a pest, no obvious fecal holes on the tree surface, no fecal debris on the ground (2) deep pest - the larvae hatched last year or the previous year, drilled moths in the xylem as a pest, there are obvious fecal holes in the trunk, and the sludge outside the holes or the ground is scattered with fecal chips.
Control: For the larvae of the pest, a special insecticide for the dried pest can be inserted into the trunk.
October
The temperature has dropped significantly, and various pests and diseases on garden plants have decreased, but some diseases and insect pests will continue to be pests, and the focus should be on aphids and leafhoppers this month.
aphids
Autumn is the second season of aphids to multiply. In September, a variety of plants have been found in various green areas of the city, and there is an upward trend, and attention should be paid to prevention and control in October to prevent large numbers of occurrences. It can be controlled by spraying agents such as cyano-marathon 1000-1500 times liquid or imidacloprid.
Leafhoppers
Leafhoppers such as leafhoppers and small green leafhoppers in each green area are more serious in harming garden plants such as peach, plum blossoms, and cherry blossoms, causing pale leaves, early leaf fall, and spreading viral diseases, relying on leaf curls. Leafhoppers will lay their eggs in mid-to-late October and overwinter, and should be controlled in time to reduce the source of overwintering insects. Prevention and treatment can be used cyanoprothon 1000-1500 times liquid and other chemical spray prevention and control.
In October, we should also pay attention to the harm of diseases and insects such as Yang Fanzhou moth, Yang Xiaozhou moth, lawn rust, etc., and remove wintering insect eggs and pupae from branches to reduce the source of wintering insects in the next year.
Prevention and control: 1, moth pests spray to exterminate young urea, mesovitae salt, the effect is obvious;
2. Rust can be sprayed with powder rust and triazolone, and the effect is remarkable;
