Integrated control of pineapple wilt and sunburn

Pineapple (scientific name: Ananas comosus), in Taiwanese official and Chinese mainland academic terms, pineapple is called ô ng-l â I, Chaoshan area is called Fanli, yellow pear is known in Maxin area, and pineapple is commonly known in mainland China, Hong Kong and Macao. Pineapple is a tropical fruit native to the Amazon basin of Brazil and Paraguay in South America, and has now spread throughout the tropics.

Pineapple meat contains fat, protein, carbohydrates, crude fiber, calcium, phosphorus, iron, carotene, vitamin B1, vitamin B2, vitamin C, niacin and organic acids. Pineapple contains a substance called "pineapple prion enzyme", which can decompose protein, dissolve fibrin and blood clots blocked in the tissue, improve local blood circulation and eliminate inflammation and edema; the sugars, salts and enzymes contained in pineapple are diuretic, and proper consumption is beneficial to patients with nephritis and hypertension. Pineapple taste Ganping, with stomach digestion, spleen diarrhea, stomach thirst and other functions.

Fusarium wilt (Fusarium wilt) is a disease caused by powder beetle insects harming pineapple plants and bringing toxins. The leaf color of the diseased plant gradually faded to red and yellow, and the leaf tip shrank and sagged, the leaf edge rolled down and tightly tied, the fruit shrunk and withered, the plant shrunk obviously, and then gradually withered.

The prevention and control methods are as follows:

1. Select disease-free seedlings and soak the roots and stems of the seedlings with dimethoate and dichlorvos mixture (40% dimethoate 250 grams, dichlorvos 250 grams, water 50 kg), or 40% dimethoate 800 times 1000 times, or turpentine mixture 6 times solution for 2 minutes.

two。 Dig up the diseased plant in time, or use one of the above drugs at the base of the gonorrhea plant.

3. The mild disease areas were sprayed with 500 × 800 methyloxanthine plus 1% 2% urea, which can not only prevent the spread of the disease, but also promote the yellow leaves to turn green and restore their vigor.

Sunburn is the phenomenon of damage to the surface of fruit caused by strong light in the growth and development of fruit trees, which affects the commercial value of fruit.

After the symptom fruit is burned, part of the pericarp shows brown scar, the pulp flavor becomes bad, and there is very little fruit juice. Tissue necrosis, rapid loss of fruit water, easy to become a hollow fruit. Affect the economic development of fruit trees.

The pathogen belongs to physiological disease.

The disease was characterized by strong light in the fruit growth and maturity stage in summer and autumn, and the illumination of the orchard reached 8 ~ 100000 lux. The fruit is easily burned when exposed to strong light directly. It should be taken seriously.

Prevention and cure method

(1) strengthen the scientific pruning of cultivation management to avoid being too sparse.

(2) during the fruit coloring period, the fruit can be covered with paper bags to reduce damage. At the same time, insect pests can be avoided.

(3) A few leaves can also be bundled up to cover the fruit, enough is enough for the leaves, do not be too tight, pay attention to ventilation.

(4) in the case of sufficient pineapple seedlings, proper removal of fruit crown buds is beneficial to prevent sunburn.

(5) choose the suitable variety. Pine needles and awn pans can be used to cover the fruit against the sun, and straw or other soft weeds can also be used to cover the fruit if necessary, but it is easy to attract crickets to bite the fruit, so pay attention to prevent crickets.