Mango diseases and insect pests are more, today the author combined with the field real pictures, to the mango disease for systematic analysis, for your reference!
Anthrax is the most common and harmful fungal disease in mango production, which can cause leaf spots, shoots, fallen leaves, fallen flowers and fruit rot during the growth period by infecting mango leaves, young shoots, flowers and fruits.
The disease is prone to occur in large quantities under high humidity conditions, and mangoes are more susceptible to disease at the flowering stage and young fruit stage, and ripe fruits are susceptible to disease, and the disease is the most serious in the young shoot stage.
1 to 2 days before flowering, after 80% of the flowers, the young shoot stage, the young fruit stage is the key period of prevention and control, the agent can choose pyrazole ether ester, benzopyroxystrobin, imidamine (easy to be harmful at the young fruit stage), Winji (75% oxime and pentazoliol dry suspension agent) and so on.
Powdery mildew can harm the inflorescence, young leaves, young shoots and young fruits of mango, the more obvious feature is that the disease part is densely covered with a layer of white powder, because the flowering period to the young fruit stage is its main occurrence period, which can cause serious flowering and fruiting, which in turn affects the fruit setting rate.
Flowering can be reduced by artificial short-cut flower spikes, improve ventilation and light transmission conditions to reduce its occurrence, prevention and control agents can choose bacteriocin, methyl tolbuzin, hexazol, anether oxystrobin, phenoxymethazole and so on.
Scab disease mainly harms young leaves and young fruits, when the leaves are onset, the initial dark brown protruding small spots, after deformity and shedding; after the young fruit is invaded, the peel appears brown or dark brown raised spots, and then expands into black necrotic spots, and some varieties can produce rough patches.
The flowering, young fruiting and pumping stages of mango are the peak of the incidence of scab disease, and effective agents can choose to win pole (75% oxime and pentazool dry suspension), anisole ester, daisen manganese zinc, copper hydroxide, etc.
The disease can be caused by a variety of fungi, such as small coal fungus, trigeminus, coal fungus, thorn shield genus, etc., can occur on mango leaf fruit, generally speaking, orchard management is extensive, poor light transmission conditions, wet orchards are prone to occur, especially more pests of the same order (there are red wax bugs in the figure above), which will aggravate its occurrence.
Soot disease can be beaten off by allicin + mineral oil, if it is a pure parasitic such as small coal bacterium, methylthiopramine, manganese zinc, etc., while strengthening the prevention and control of pests of the same order such as aphids and mesenchystia.
The disease mainly harms mango fruit, and the initial part of the disease (near the fruit stem) produces water-soaked brown irregularly shaped spots, and then appears dark brown to black, and rapidly develops downwards.
Generally speaking, this disease is a disease that occurs in the early stage of infection, latent, close to maturity to the recurrence of post-harvesting, so the prevention and control of the growth period and the harvesting treatment should be paid attention to. Early medication can refer to anthrax, harvesting one fruit and two shears, reduce mechanical injury, and use imidaminamine and other impregnated fruit treatment.
Also known as bacterial horn spot disease, mainly harmful to the leaves and fruits of mango, can cause leaf fall, fruit fall, damage to the appearance of fruit quality, because the wound will crack, the later stage is often mixed with anthrax, pedicle rot.
Mango is prone to disease during the picking, flowering and fruit development stages, especially after typhoons and rains. The prevention and treatment agents are mainly copper preparations, such as copper thiorilate, quinoline copper, thiamethios copper, copper hydroxide, spring thunder king copper and so on.
The essence of flow glue is caused by excessive synthesis of gum polysaccharides, and single or mixed occurrences such as diseases, insects, and mechanical injuries are likely to occur.
Generally speaking, what we call gum disease refers to the disease caused by the infection of the trunk, branches and petioles by mango pseudostem fungus.
The treatment method for gum disease is to scrape the diseased part, and then apply the wound with copper hydroxide and diphenoxymethanazole, and if there is a significant moth hole, it should also kill the resident pests such as Tianniu.
The pathogens are mainly Coccidioides and Mycobacterium, which have a great impact on the appearance and quality of mango, and its incidence is related to the thickness, toughness and tree potential of the peel, and the closer to the ripe fruit, the more serious the disease.
At present, there is no specific agent, and prevention should be the mainstay. It can be sprayed with sea spirit biological irritants during the growth period to enhance the level of tree potential, and foliar fertilizers such as Gesme and Boron Source Library can be sprayed during the flower and fruit stage to supplement calcium, magnesium, boron and other trace elements to increase the thickness of the peel and promote powdering. In addition, the control of pests of the order Homoptera should be strengthened.
This article is written and sorted by the agricultural assistant team, please be sure to indicate the source of the agricultural assistant, and do not modify the content of the article, the modification must be investigated!