How is broccoli bad, how is broccoli bad

Method 1. It is a very simple and effective way to tell if a broccoli is broken by the color of its surface. The color of broccoli looks emerald green, then it means that this broccoli is high-quality and fresh, and it is not broken, and the color of broccoli looks relatively yellow, then it means that this broccoli has been placed for a long time and is not fresh, if the color of broccoli flowers is also yellow, then it means that this broccoli has begun to spoil, and this broccoli is not edible.

Method two. By weighing the weight of broccoli, it is also one of the ways to distinguish the quality of broccoli, when buying broccoli, put two broccoli of the same size in your hand to compare their weight, if the same size, light weight then it is not recommended to buy this, if its weight is light, it means that it has lost a lot of moisture in it, this broccoli has begun to break.

Method three. To know whether the broccoli is broken, we can also look at its flower stem incision, usually some of the broccoli we buy are harvested and picked by a knife, by carefully checking whether the broccoli stalk incision is fresh, if the incision position looks relatively tender green and moist, then it means that it is still very fresh in the near future, on the contrary, if the incision is more yellow and dry, then it may be picked for too long, there are bad signs, it is not recommended to buy this kind of broccoli. The nutrition of broccoli is very comprehensive, which is of great help to our health, but if the broccoli we eat is not fresh, then it will be detrimental to our health, so we must be cautious when buying broccoli.

The surface begins to darken, soften and fleece.

If the broccoli is rotten, soft, moldy, and smelly, it is a proof that it is bad.

How to buy broccoli:

1. The buds should be green, soft and full of light and cautious, and the first bulge should be selected; Shihuai Hu.

2. The degree of tenderness lies in the flower buds, and the taste of the bud is good;

3. Pay attention to the integrity of its buds;

4. The cauliflower turns yellow, indicating that it is no longer fresh and should not be purchased.

How to preserve broccoli:

Wrap the broccoli in a paper sheet or breathable film, spray a small amount of water on the paper, and then put it upright in the refrigerator compartment to keep it fresh for about a week.

Broccoli is the main pest control.

Abstract:1. Downy mildew (1) symptoms. It is a fungal disease, which is more obvious in the development process of flower bulbs, the old leaves first develop the disease, and then spread to the young leaves, and the lack of green and the yellowing of the leaves appear in the early stage of the disease. Dry.

1. Downy mildew (1) symptoms. It is a fungal disease, which is more obvious in the development process of flower bulbs, the old leaves first develop the disease, and then spread to the young leaves, and the lack of green and the yellowing of the leaves appear in the early stage of the disease. When dry, the leaves dry out, and when wet, mold appears on the back of the leaves.

2) Prevention and control methods. Choose varieties that are highly resistant to disease. Avoid continuous cropping, the soil should be turned deep and whitened, and an appropriate amount of lime should be applied to improve.

At the beginning of the disease, spray with 600 800 times of 70% mancozeb wettable powder, or 400 600 times of methamphene. Stop using pesticides 10-15 days before harvesting.

2. Symptoms of soft rot (1). It is a bacterial disease, and broccoli is prone to occur when it encounters more rain in the later stage of growth. The lesions are water-stained, gradually softening and decaying, producing a foul smell; Germs invade from wounds on roots, stems, and leaves.

2) Prevention and control methods. Avoid co-cropping with cruciferous vegetables, especially cabbage and cabbage. Strengthen field management and cultivate strong seedlings.

Avoid injuries and pay attention to drainage after rain. At the beginning of the disease, spray streptomycin sulfate, or 72% agricultural streptomycin wettable powder 3000 4000 times, or new phytomycin 4000 times.

3. Diamondback moth (1) Symptom performance. The first instar larvae can only feed on the mesophyll, leaving a transparent epidermis, and the 3 to 4 instar larvae can eat the leaves into holes, and in severe cases, the whole leaves are eaten into a net. 2) Prevention and control methods.

At the beginning of the disease, black light is used to trap and kill adult insects. It can also be sprayed with 500 1000 times of Bacillus thuringiensis preparation, or 1000 2000 times of 50% phosphine emulsifiable concentrate. Stop using pesticides 10 days before harvesting.

4. Symptoms of cabbage worm (1). The larvae eat the mesophyll, leaving only a layer of transparent epidermis, and only leaf veins are left, which is prone to soft rot when harming the flower bulbs, and insect feces will also pollute the flower bulbs and reduce the value of the commodity. 2) Prevention and control methods.

At the beginning of the disease, spray with BT emulsion, or 500 800 times of green worm 6 solution, or 1000 times of 50% phoxanthion emulsifiable concentrate, or 3000 4000 times of 20% fenvalerate emulsifiable concentrate. If it rains after spraying, it should be sprayed. Stop using pesticides 10 days before harvesting.

5. Symptoms of vegetable aphid (1). The damaged plants are seriously dehydrated, shrinking, yellowing, twisted and deformed, and the damage of vegetable aphid can also cause soot disease and spread virus diseases. 2) Prevention and control methods.

Set up yellow plates to trap aphids in the broccoli field, and 8 yellow plates per mu. Hang silver-gray membrane strips to avoid aphids, the membrane width is 12 23 cm, and the height is less than 1 meter. At the beginning of the disease, spray with 40% dimethoate 1000 times liquid, or 80% dichlorvos EC 1000 2000 times liquid.

Stop using pesticides 15 days before harvesting.

Why: Broccoli is a cruciferous vegetable that contains a special substance called glucosinolated, which reduces the risk of cancer. Since these disease-resistant compounds all contain sulfur compounds, cruciferous vegetables all have a spicy flavor that some may consider to have a strange bitter taste.

Blanching broccoli before frying will not be bitter, and it can maintain the color of vegetables, as well as remove odor, astringency and oxalic acid. Importantly, eating broccoli regularly can reduce the risk of not just one type of cancer, but the well-known breast, prostate, colon, ovarian, cervical, liver cancer, and many more.

However, from the perspective of nutrition, blanching can increase the loss of water-soluble nutrients, and the loss rate of vitamin C is as high as 65% when the cabbage is blanched in 100 water for two minutes; Blanching for more than 10 minutes, vitamin C is almost lost. Therefore, blanching should be done in an appropriate way to minimize the loss of nutrients. Generally, broccoli is treated with boiling water with a large amount of water and a short time of blanching, which can reduce the heat loss of nutrients.

Because of the presence of oxidase in vegetable cell tissues, it can accelerate the oxidation of vitamin C, especially in the water temperature of 60 -80, the activity is the highest. In boiling water, oxidase enzymes are unstable to heat and quickly lose their activity, while boiling water contains almost no oxygen, thus reducing the loss of vitamin C due to thermal oxidation.

It is precisely because it was sold expensive in the past, and many people will plant more yields, which will naturally be low. If you can't make money by planting broccoli this year, you won't plant it next year.

Chinese have not eaten broccoli for a long time, and many post-70s generations have not eaten this dish when they were young. However, broccoli is so popular, it is not for nothing, broccoli may be the most significant is that it has the effect of preventing cancer and anti-cancer, cauliflower contains more vitamin C, higher than Chinese cabbage, tomato, celery, especially in the prevention and treatment of stomach cancer, breast cancer is particularly effective.