How harmful are coconut worms? What is the method of controlling pests and diseases in coconut?

Serious harm to coconut and oil palm.

Betel nut, wine bottle coconut and other palms.

Plant. At the end of the 70s of the last century, it was introduced to Taiwan, causing nearly 100,000 coconut trees.

Death. In June 2002, it was first held on Hainan Island in China.

It was found on coconut trees in Haikou City, and subsequently caused great harm to palm plants in Hainan.

There were 310,000 coconut trees that year.

Affected, the epidemic area covers an area of 100,000 mu. By the end of August 2004, 520,000 acres of palmaceae in 16 cities and counties in 18 cities and counties in the province had been damaged, and 810,000 plants had been damaged. Yields of damaged coconut and betel nuts fell by 60 to 80 percent.

Coconut leaf nail quarantine method:

Not from countries and regions where there is a distribution of coconut leaf beetle.

Import host seedlings. If it must be imported, it needs to be strictly quarantined: mainly check whether the leaf surface and leaf back of the leaf are not and the original heart to see if there are harmful signs of coconut leaf beetles and the presence of adults and larvae.

At the same time, check the loading containers such as containers, cartons and other boxes for this insect. If it is not found at the scene, cut the leaves with symptoms and return to the room to check whether there are eggs.

Since the coconut leaf beetle only feeds on the undeveloped heart leaves, and the oviposition and pupation are also in its folded mesophyll, it can be cut and burned to reduce the number of exports.

The above content refers to the encyclopedia--- coconut leaf beetle.

Symptoms of coconut diarrhoea: cracks appear in the branches, oozing dark brown mucus, which is black after drying, and the cracks are rotten. Prevention and control methods:

Remove the diseased tissue and apply 10% Bordeaux solution or coal tar. Red palm weevil larvae drill the trunk of the tree, can make the coconut tree die, the wound is covered with asphalt or mud during the prevention and control, and the serious cut down and burned to avoid spreading. Adults and nymphs of coconut scale suck the juice on the back of the leaf and the fruit surface, and spray pesticides such as imidothion, marathon, and dibromophos during control.

(Chen Yuanfen).

China has been planting coconut for more than 2,000 years, with the cultivation area of Hainan Province as the largest, reaching more than 140,000 acres, with an annual output of 16 million fruits, in addition to the Leizhou Peninsula in Guangdong and Taiwan, Guangxi, southern Yunnan and other places, there are a small amount of cultivation. Regarding the types of coconut diseases, there was no detailed record in China in the past, and now according to the relevant data, there are 13 kinds of fungal diseases. Among them, Ceratocystis paradoxa (Dode) Moreau and Phytophthora palmivora butler are the most common and serious occurrences of coconut leaf spot.

These diseases were rarely studied and controlled before the 60s; Since the 70s, due to the expansion of coconut planting area year by year, a large number of chemical fertilizers, the occurrence and damage of coconut dry rot has gradually become serious, Hainan and other relevant units have carried out research and prevention of the main diseases of coconut.

1. Gray spot disease.

Gray spot prevention and control methods: strengthen nursery management, improve drainage conditions, pay attention to balanced matching when fertilizing, should not apply nitrogen fertilizer alone, but also appropriate top application of phosphorus and potassium fertilizer, can improve the disease resistance of plants. At the onset of the disease, it can be sprayed with chlorothalonil, Dysenmeng and other agents, and then the infected leaves and the dead ones that have fallen off can be removed and collected and burned to prevent and control secondary infection.

Bud rot bud rot.

Prevention and control methods: to strengthen management, more inspections, found that the leaf buds have diseases, in time to manually remove the lesion position, to prevent the spread of the disease, and then spray copper or other fungicides to prevent and control, the wound to be removed should be treated, so as not to invade other germs and other diseases, in addition to the excision of the part must be burned, not littered everywhere, if the plant grows to be damaged, the whole plant will be cut down and burned.

Dried coconut stem diarrhea.

Prevention and control methods: to add coconut tree protection work, to prevent its trunk loss due to man-made or other reasons, so as to reduce the occurrence of the disease, strengthen fertilizer and water management, increase phosphorus and potassium fertilizer, improve disease resistance, pay attention to drainage. When the disease is found, the lesion is excised, and then the wound is coated with coal tar or Bordeaux pulp, and the tissue must be burned to avoid secondary infection.

Heart rot is sprayed once a week from March to June 6 with 65% zebsen 500 times and ammonium dysenium 300 times, and fertilizer and water management should be strengthened, water control should be controlled, and nitrogen fertilizer should be applied without bias to prevent scale insects.

For leaf spot disease, appropriate phosphorus and potassium fertilizers should be applied, and foliar sprays should be applied with 1 Bordeaux solution, 500 700 times of zebsen, 800 1000 times of crown crown copper or 300 500 times of 50 grams of bacterialdan, once a week for several weeks.

Anthrax, in the early stage of the disease, it can be sprayed 500 times, 50% carbendazim 800 times, 75 chlorothalonil 500 times, crown bacteria copper 600-800 times, dyszeb 500 times, Fumei 800 times, etc., several times in a row.

FYI.

It looks like I got whiteflies from **.

1) The whitefly is also known as the small white moth. It belongs to the family Homoptera.

2) File and suction mouthparts, adults and nymphs suck plant juice, and the damaged leaves fade green, yellow, wilt, and even die of the whole plant.

It can be sprayed for prevention and control, and the drugs are 600-800 times thistle, acetamiprid, matrine), thiamethoxam, dimethoxam, chrysanthemum emulsifiable concentrate, zinc chloride emulsifiable concentrate, methosalic, kung fu pyrethrin or Uranus, etc.