New green control technology to grow safe strawberries

Around New Year's Day, it is the season when greenhouse strawberries are ripening one after another. The mellow and sweet strawberries attract the general public to pick them. To this end, the city's plant protection department vigorously promote new green control technology, in the prevention of disease to promote production, at the same time, let everyone pick more safe and rest assured strawberries.

In the past three years, the municipal plant protection station has carried out field experiments of 5% aminooligosaccharides on a variety of crops in the suburbs of Beijing, and achieved good results. Among them, the plant protection station of Lianchangping District carried out related experiments on strawberries, which were applied twice in 2-3 days of planting, once in the early flowering stage, once in the young fruit stage and once in the fruit expansion stage. The results showed that the application of 5% aminooligosaccharins could significantly promote the growth potential, induced disease resistance and yield of strawberries. under the same conditions of water and fertilizer management in the field, the plant height of strawberries in the treatment group increased by 9.3%, and the number of leaves increased by 12.3%. The stem diameter increased by 4.8%, and the control effect of 5% aminooligosaccharins on powdery mildew reached 45.45%. In the measurement and investigation of the single fruit weight of strawberry, the single fruit weight of strawberry in the treatment group increased by 19.61%.

■ what is aminooligosaccharide

Aminooligosaccharide is a kind of chitosan extracted from the shell of marine crustaceans by biological enzymatic hydrolysis engineering, which can induce plants to improve their immunity to the outside world, so as to resist disease and stress (cold damage, drought) and promote the healthy growth of crops. it is a new type of multi-functional "plant immune inducer". When plants are infected by adverse environment, aminooligosaccharins induce crops to produce related proteins and biochemical substances, such as phenylalanine ammonia-lyase, β-1Magin3-glucanase, chitinase, peroxidase, phytoprotegerin and so on. in order to resist the invasion and development of pathogens and stress factors, reduce and prevent the occurrence of diseases.

Six functions of ■ aminooligosaccharins

◆-induced stress resistance: cold resistance, freezing resistance, waterlogging resistance, high temperature resistance.

◆ disease resistance: it can induce resistance to fungal diseases.

◆ promotes growth, root, seedling and leaf protection.

◆ improves the quality and increases the commodity rate: the change of appearance and the content of organic acid and vitamin.

◆ increases production: it can increase production in many crops such as grain, vegetables, fruit trees and so on.

◆ improves the storage resistance of agricultural products.

Correct use of aminooligosaccharides in ■

Aminooligosaccharins are used in the critical growth period of crops, and the recommended concentration is 8-1000 times, diluted with water for 3-4 times. Grain crops and melons and vegetables should be treated with seeds diluted by 50,500 times and mixed / soaked.

If it is used in rice and wheat, the suitable period of application is slow seedling stage or returning to green stage, tillering stage, jointing stage and filling stage.

If it is used in fruit trees, the suitable period for application is flower bud germination, flowering, young fruit and fruit expansion.

If used on melons and vegetables, the suitable period for drug use is from seedling stage, flowering stage and fruiting stage.

If cold injury and other adversity occur, it is best to use medicine in advance, spray 750-800 times, and spray once every 7 days.

Using Lisen dry powder to control strawberry disease is safe and non-toxic.

In the past, as long as diseases were found on strawberries, producers first thought of using sprayers to spray with water for spray control. Now, technicians from Changping Plant Protection Plant Inspection Station and Beijing Zanfeng Agricultural Science and Technology Co., Ltd. have respectively tested strawberry Haolisen dry powder in six plantations in Changping District, including Hongcheng Meilin, Maofasheng, and Tianyunyuan. In the experiment, technicians used a special sprayer to spray dry powder directly in the shed. The dry powder is suspended in the air and settles slowly in a fog.

Haolisen powder is mainly composed of calcium superphosphate and inorganic salts, which has a good inhibitory effect on all kinds of bacteria, fungi and viruses. Safe, non-toxic, no residue, can effectively reduce the use of chemical pesticides and ensure the edible safety of strawberries.

The advantages of ■ dry powder medicine

◆ dry powder medicine does not need to be diluted with water, and it is sprayed directly by dry powder sprayer, which is simple to operate and saves time and effort.

Compared with traditional chemicals diluted with water, ◆ is sprayed more evenly in the process of application. The dry powder sprayed in the air will settle naturally and can be uniformly attached to the crop surface to give better play to the efficacy and achieve the best control effect.

◆ spraying dry powder directly can effectively control the environmental humidity of crops in the greenhouse and reduce the occurrence of all kinds of diseases.

◆ has a wide range of applications, including strawberries, vegetables, fruits, flowers and food crops.

Notes for ■

If the shed area is large and needs to be sprayed with dry powder many times, it must be configured in strict accordance with the pesticide instructions.

When spraying dry powder, it is necessary to ensure that the powder is uniform, in order to achieve the best control effect.

All kinds of chemicals are affected by the environment. Read the pesticide instructions carefully and pay close attention to the temperature, humidity, drug use and biological natural enemies in the shed, so as to prevent drug damage and unnecessary losses.

When spraying powder, choose to operate without wind as much as possible.

Choose pesticides that are non-toxic to humans and animals as far as possible to reduce the harm of pesticides to the health of operators. Protect the quality and environment of agricultural products while protecting the ecological environment. Li Jin, Pesticide Management Station of Changping District