Prevention and control guidelines
Caution!!!
According to the forecast of the meteorological department, the average temperature in May is slightly higher than that of the same period in history, and there is more rainfall, which is prone to citrus diseases and pests. According to a recent survey by the county plant protection and plant inspection station, citrus diseases and insects are more serious than the same period last year, especially citrus brown spot disease.
All growers should pay great attention to check the occurrence of orchard pests and diseases in a timely manner and carry out prevention and control.
Citrus is the main pest and disease
Prevention and control recommendations
Prevention and control strategies
Firmly establish the plant protection policy of "prevention first, comprehensive prevention and control", and practice the concept of "green plant protection and public plant protection". On the basis of fitness cultivation and ecological regulation, priority should be given to the application of biological pesticides, and high-efficiency, low-toxicity and low-residue chemical pesticides should be used scientifically.
01
Citrus brown spot disease
It mainly damages young shoots, flower buds, leaves and fruits, causing brown to black-brown lesions, which spread along the leaf veins to form trailing whisker lesions. The disease has the characteristics of rapid and severe occurrence, and can cause leaf loss, dead shoots, and fruit drop in a short time.
For prevention and control, allicin, difenoconazole, mancozeb, azoxystrobin and other agents can be used for prevention and control (Ehime and golden autumn sugar oranges should be focused on prevention and control).
02
Citrus anthracnose
Citrus anthracnose is a common and serious disease, after the onset of the disease, it causes leaf drop, fruit drop, branch tip death, bark bursting, tree decline, and the whole plant dies when it is serious, and the fruit is close to the ripe stage for the fruit stalk, causing the stem to wither.
For prevention and control, allicin, prochloraz, difenoconazole, azoxystrobin, azole ether and other agents can be used for prevention and control.
03
Citrus resin disease (sarsand bark)
It mainly damages branches, fruits, leaves and other parts, and when it occurs severely, it causes a large area of destruction of the garden or a large number of rotten fruits in the process of storage and transportation, which affects the life of the tree and the commercial value of the fruit.
For prevention and control, azole ether tebuconazole, clodidan, mancozeb, azoxystrobin, prochlorazine and other agents can be used for prevention and control.
04
Citrus red, yellow spider
Several generations occur in one year, the generations overlap, the winter eggs hatch from February to March, and the peak period is from April to May, mainly harming spring shoots; September to November is the second peak period, mainly for the damage to autumn shoots and fruits.
It is recommended to use predatory mites for prevention and control, and pesticides such as veratrol rhizome extract, matrine, ethoxazole, and acetazole nitrile can be used for prevention and control.
05
Scale insects
In order to damage leaves, branches and fruits, 2~3 generations occur in 1 year, which often leads to leaf wilting, branch wilting, and even the death of the whole plant.
For prevention and control, matrine, stone sulfur mixture, ethyl spiracin, acetamiprid, thiamethoxam and other agents can be used for prevention and control.
06
Citrus fruit fly
Citrus fruit flies feed on the larvae in citrus fruits, resulting in maggots, which are yellow before ripening and fall fruit in advance from September to October every year.
During the prevention and control, a viscose ball trap (fly trap) can be hung to trap and kill, and sweet and sour liquid and avermectin (concentrated bait) can also be used to trap and kill.
Tips
Protect the ecological environment
Recycling of pesticide packaging waste
Do not abuse pesticides
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