At this stage is the season of high temperature and high humidity, but also one of the key periods of pest control, can not because of the reduction of the incidence of some diseases and insect pests and relax the control of all diseases and insect pests, in this month, Zhongwei Happy Forest should remind everyone to pay special attention to the control of grubs, twill moths, camphor nest borers and so on.
First, the prediction of insect pests in garden plants
1. Scarab beetles, grubs
In July, a variety of scarab beetles have been feathered into adult insects, many green areas planted in the wood hibiscus, beech trees, green trees, bayberry, fire thorns, red maples, etc. are seriously endangered by the scarab beetles, resulting in more leaf holes, scarabs have daytime and nocturnal outcrops, hiding in the grass or bushes near the host plant during the day, and the harm at night, the prevention and control should be carried out in the evening or early morning, and the prevention and control can be sprayed with 15% perchloride chlorpyrifos (happy forest catcher). It can also be used to kill the host plant in the evening by shaking. In late July and early August, the spawning grubs will hatch into the subterranean topsoil layer of the trees and harm the roots of the lawn, and the large number of insect mouths may cause the death of the entire lawn. The problem of soil sterilization during prevention and control can be controlled with the help of hitting green health, quickly activating elements such as phosphorus and potassium in the soil and improving fertilizer utilization.
2. Cuckoo reticulated bug
The damage period of Rhododendron reticulated bugs is from April to October, and the high temperature and dryness in July and August may cause its outbreak. Prevention and control can be 20% cyanopent marathon (happy forest flower music) spray control, reticulated bugs generally cluster leaf back hazards, so the prevention and control should pay attention to the spray of leaf back.
3. Red Spider
The red spiders that occur on the roses are prone to erupt in the cool season of May, while the red spiders that occur on the camphor are different, the season that is prone to high temperature and dryness, the little rain in the plum season will cause the large occurrence of the camphor red spider, and the red spider will cause the leaves to lose green and brown after feeding, which not only affects the tree posture but also affects the landscape. Prevention and control should be carried out in time, and the prevention and control can be sprayed with 32% of Avida mite (happy forest splendor), and the spray should be sprayed as much as possible to make both sides of the leaf sprayed.
4. Thorn moth
Thorn moths are commonly known as sheep spicy hair, there are many types, mainly yellow moth, green moth, green moth, flat moth and so on. Mostly larvae in the cocoon overwintering, young fine larvae cluster to eat leaves, for a wide range of harm, harm maple poplar, red leaf plum, camphor, heather, cherry blossoms and other garden plants, severe can eat the leaves, the landscape impact is larger, generally appear in mid-to-late June, July to September the heaviest, the initial cluster leaf back hazard, so spray control should pay attention to the leaf back full spraying. Control can be achieved with 15% perchloride chlorpyrifos (happy forest catcher).
5. Lawn nocturnal moth
Lawn nocturnal moth to twill nocturnal moth, silver nocturnal moth mainly, has occurred in July, the high temperature weather after the plum season may cause the outbreak of nocturnal moths, so pay close attention to the occurrence of lawn nocturnal moths, once found that there are bald spots on the lawn, to focus on observation, if found in time to prevent. Because of its diurnal and nocturnal habits, the prevention and control time must be selected after the sun goes down. Control can be carried out with 15% perchloride chlorpyrifos (happy forest catcher).
6. Kang's mealybug
Kang's mealybug is also known as mulberry mealybug. At present, in the urban road isolation belt and the community of the golden leaf Privet on a large area of occurrence, symptoms are often mistaken for plants due to sun exposure and lack of water caused by leaf dryness, careful observation, can be found that there are white flocculents, the relevant units should cause enough attention, pay close attention to prevention and control. Prevention and control methods: prune diseased insect branches, clean up and burn in time. Prevention and control can be sprayed with 20% cyano-pentathon (Happy Forest Flower Music), sprayed every 5 to 7 days, and 2 to 3 consecutive times of medication, it can be completely eradicated. When spraying, pay attention to spraying the whole plant (including diseased plants and healthy plants), and apply the medicine evenly on the front and back of the leaves, and the effect is better.
Preventive measures: try not to prune strongly during the growth period, if in order to be neat and consistent, it must be pruned, after pruning, it is necessary to spray a soil fungicide such as dilution of 500-800 times of the green health, spray 3 to 4 times continuously, eliminate underground pests, improve fertilizer utilization. Usually, it is necessary to strengthen management, pay attention to ventilation, reasonable fertilization, scientific watering, and enhance tree potential and disease resistance.