【1】Chinese common name 1-Methylcyclopropene

【2】English common name 1-MCP, 1-methylcyclopropene

【3】Commodity Name Xian An, Smart Fresh, An Xipei

【4】Chemical name 1-Methylcyclopropene

【5】CAS No. 3100-04-7

【6】Molecular formula C4H6

【7】Relative molecular mass 54.09

【8】Physical and chemical properties

The original drug is a colorless gas, and the preparation is a white powder or a flake solid; it decomposes when heated to 200°C, stable below 200°C, soluble in water in a small amount, and soluble in lower alcohol organic solvents.

【9】Features

1-Methylcyclopropene is mainly used as a preservative for fruits, vegetables, flowers and other crops. Its mechanism of action is receptor competition, preemptively binding to ethylene receptor proteins (and irreversible), blocking the binding of endogenous and exogenous ethylene to ethylene receptor proteins, thereby inhibiting the physiological and biochemical processes related to the maturation or aging of fruits, vegetables, flowers and other crops. reaction, and finally achieve the effect of preservation.

【10】Application Technology

Apple

①Pre-harvest spraying, 8 days before harvesting, spraying the crown with 200mg/L liquid medicine, without affecting the coloring and single fruit weight, the fruit can maintain a high hardness and limited shelf life. ②For post-harvest fumigation, 1 day after harvest, fumigate 3 apple varieties “Marshal”, “Fuji” and “Gala” at 4.1-8.25mg/m3 in a carton or 1.2-2.4mg/m3 in a closed space for 12h Then, open the box (door) for ventilation, and then store it under conventional storage conditions, which can significantly reduce the softening rate of the fruit, maintain a high acidity, significantly reduce the respiration rate and ethylene release, thereby slowing down the post-ripening process. (Note: The preservation effect of fumigation treatment is significantly better than that of spray treatment.)

pear pear, fengshui pear

1 day after harvest, after fumigation of 1.2～2.4mg/m31-methylcyclopropene in a closed space for 8～12h, open the door and ventilate, and then store under conventional storage conditions, which can improve fruit firmness and reduce fruit respiration rate. Delay the appearance of the ethylene peak and reduce the peak.

Peach

After being treated with 1 mg/m3 1-methylcyclopropene for 8 hours, the fresh-keeping effect of placing it in refrigeration (3±1) ℃ and room temperature showed that the peaches treated with 1-methylcyclopropene could effectively keep the peaches under refrigeration conditions. Soluble solid content and cell membrane permeability, inhibit fruit weight loss, respiration intensity and polyphenol oxidase (PPO) activity, maintain fruit firmness, soluble sugar content, and reduce MDA content.

Kiwi

After fruit picking, fumigation with 0.6 square meters of 31-methylcyclopropene for 24 hours, opening the door for ventilation, and subsequent storage can significantly reduce the respiration intensity and ethylene release of the fruit, and maintain a high level of vitamin C and glutathione (GSH). ) of the redox ratio to maintain a high antioxidant level in cells.

Melon

After picking melons, use 1. 2.4 1-Methylcyclopropene should be fumigated in a closed space for 12-24 hours, and stored conventionally after opening the door for ventilation. It can significantly inhibit the respiration intensity and ethylene release rate of thin-skinned muskmelons of different maturity. Thereby, the quality loss during storage is reduced, the yellowing of the skin of the fruit and the post-ripening process are delayed, the rot rate during storage is reduced, the edible quality and taste are maintained, and the shelf life of the thin-skin melon is prolonged.

Persimmon

After harvesting, after 0. 2.4mg 1-methylcyclopropene is airtightly fumigated for 8 to 12 hours, and stored conventionally after opening the door for ventilation. It can significantly reduce the ethylene release rate and respiration intensity, and can also delay the appearance of ethylene release peak and respiration peak. It can effectively maintain fruit storage quality and prolong storage period and shelf life. economic benefits.

Banana

Use 0.2～0.5mg/1-methylcyclopropene for airtight fumigation for 8h, and store it conventionally after opening the door for ventilation. It can reduce the degree of heat damage of bananas and prolong the storage life of fruits under high temperature.

Strawberry

Use 0.2～0.6mg/m3 11-methylcyclopropene for airtight fumigation for 4 hours, and store it conventionally after opening the door for ventilation. It can inhibit strawberry fruit respiration and maintain high superoxide dismutase activity.

Cherry

After 1mg/m31-methylcyclopropene is airtightly fumigated for 12-24h, the door is ventilated and stored conventionally. It can maintain low lipoxygenase (LOX) activity, while reducing superoxide anion production rate, H2O2 accumulation and malondialdehyde content, which is beneficial to maintain fruit quality.

Mango

After 1 ~ 10mg/m31-methylcyclopropene airtight fumigation for 8h, open the door and ventilate and store conventionally. It can significantly delay the appearance of its respiration peak, and can significantly inhibit the activity of lipoxygenase at 10 days after treatment (the activity decreased to the lowest at 20 days after harvest); in the early storage period (10 days), it can significantly inhibit the biosynthesis of ABA and keep the content of abscisic acid. at lower levels.

Jujube

For different varieties such as winter jujube, green jujube, and crispy jujube in mid-autumn season, use 0.3-0.4mg/g/m31-methylcyclopropene for airtight fumigation for 12-24 hours, and store them routinely after opening the door for ventilation. It can significantly reduce the respiration rate and ethylene release rate of the fruit, slow down the decline of hardness and starch content, prevent water loss, and have an obvious effect on maintaining the palatability of jujube fruit. It has a certain effect in the practical production of extending the shelf life, especially if the shelf life exceeds 15d, the effect is more obvious.

Plum

5mg/m31-methylcyclopropene is airtightly fumigated for 12 hours, and stored in cold storage after opening the door for ventilation, which can effectively inhibit the browning caused by cold damage and browning caused by mechanical damage.

Dragon fruit, longan

Take 0. .5~1mg/m31-methylcyclopropene is airtightly fumigated for 12h, and then stored in cold storage after opening the door for ventilation. It has a good effect on maintaining the freshness of the fruit during the refrigeration period, and can be extended for 3~6d; delaying the decline of titratable acid and vitamin C content, Inhibit the increase of reducing sugar content and significantly delay the quality deterioration during storage.

Grape

Using 0.5 1.5mg 1-methylcyclopropene for 12h airtight fumigation, combined with ice-temperature storage [temperature ng/m3 (-0.0.3 ℃], can improve the good fruit rate of grapes in different degrees, and reduce the quality loss rate and fruit quality. Stem browning index can inhibit the increase of grape ear respiration intensity and ethylene production rate, and can effectively inhibit the increase of fruit malondialdehyde, superoxide anion free radical, hydrogen peroxide content and lipoxygenase activity, which is beneficial to improve grape harvesting. Post-storage quality and fruit resistance, delaying fruit senescence.

Sweet pomegranate

Use 0.25 ~ 1.5mg/m 1-methylcyclopropene to airtightly fumigate the sweet pomegranate for 12 hours, open the door and ventilate and store it conventionally, which has the effect of keeping fresh and can reduce the rate of decay.

Fig

Use 1.5mmg/m31-methylcyclopropene for airtight fumigation for 12h, open the door and ventilate and store it conventionally, which can delay fruit senescence and has a fresh-keeping effect.

Pawpaw

After 0.9mg of 1-methylcyclopropene was airtightly fumigated for 12h, and stored at room temperature after ventilation, it can significantly inhibit mg/m3 and delay the reduction of soluble solids, vitamins, titrated acid and hardness of papaya fruit, and significantly inhibit its post-harvest. When cooked, the storage days can be extended by 9d.

Tomato, cucumber, zucchini

After harvesting, use 1.2~2.1-methylcyclopropene for airtight fumigation for 12 hours, and store at room temperature or in cold storage after opening the door for ventilation, which can prolong the storage days and has a fresh-keeping effect.

Chili

After being airtightly fumigated with 0.9mg/1-methylcyclopropene for 12 hours, and stored at room temperature after ventilation, aging can be delayed, and the storage days can be extended for 6 days.

Parsley

After treatment with 0.4mg/m31-methylcyclopropene, it can significantly inhibit the respiration intensity of celery, delay the appearance of respiratory peak, reduce the degradation rate of chlorophyll and vitamin C, and improve the sensory quality of celery. Reducing sugar and soluble protein content had no significant effect.

Broccoli, Cauliflower, Cabbage, Kale

After 0.9mg/m31-methylcyclopropene is airtightly fumigated for 12h, and stored at room temperature after ventilation, it can delay aging and prolong the storage days for 3-4d.

(fresh cut) Watermelon

The fresh-cut watermelon was fumigated with 1mg/m31-methylcyclopropene for 24 hours, which could significantly reduce the respiration rate and ethylene production of the fresh-cut watermelon, and maintain the hardness and color of the fresh-cut watermelon.

Asparagus

After treatment with 4mg/m31-methylcyclopropene, it can significantly inhibit the respiration of green asparagus during storage; it has inhibitory effects on the decrease of vitamin C and chlorophyll content and the accumulation of malondialdehyde; it increases the superoxide dismutase level. It reduces the activities of peroxidase and phenylalanine aminotransferase, thereby delaying the aging process of tender stems, and has a good effect on reducing postharvest loss and maintaining quality of asparagus. The storage period can be extended for 2-3 days at room temperature and 5-10 days at 4°C.

Oyster mushroom, king oyster mushroom

The picked fresh oyster mushrooms were pre-cooled for 7 hours in the cold storage (2±1) °C, placed in a 0.2m3 airtight plastic film room, fumigated with 0.9mg/m31-methylcyclopropene for 12h, and then put into a fresh-keeping bag and placed in a plastic film room. (6±1) ℃ storage can effectively inhibit the browning of oyster mushrooms, reduce the weight loss rate, improve the storage quality and prolong the fresh-keeping period.

Orchid

After 1.44~2.2mg/m31-methylcyclopropene fumigation treatment, it can delay the increase of cytoplasmic membrane permeability, reduce the accumulation of MDA, delay the decrease of soluble sugar content, and delay the decrease of the activity of the protective enzyme POD, thus achieving the effect of delaying the senescence of orchids. .

Gerbera

After fumigation of 2.24-3.36mg/m31-methylcyclopropene, it can delay the increase of cytoplasmic membrane permeability, reduce the accumulation of MDA, delay the decrease of soluble sugar content, and delay the decrease of the activity of protective enzyme POD, thereby delaying the cut flowers of gerbera. Aging effect.

Rose, carnation, lily, eustoma and other cut flowers

Using 1~8mg/m31-methylcyclopropene for 4~8h airtight fumigation can prolong the viewing time of cut flowers under normal temperature vase conditions, delay the appearance of peak peroxidase activity in cut flowers, and make the content of petals in vase during vase. The increase in sugar content increases the water absorption of cut flowers, thereby delaying the phenomenon of curved stems and bluestaining in cut flowers. At the same time, according to the instrument measurement, this treatment significantly reduced the rate of change in the stem and flower weight of cut flowers, and the peak of peroxidase activity was also delayed.

【11】Notes

①The finished product needs to be sealed and stored at room temperature.

②Variety, maturity, treatment dose and treatment time all have an impact on the preservation effect, so do a test before using this product. ③Use in strict accordance with the instructions for use, avoid contact with skin, eyes, and inhalation of gas. Pay attention to personal protection during the spraying process, do not smoke or eat.