**How to use paclobutrazol in rape in planting**
As an important oil crop, rape occupies a pivotal position in China's agricultural production. In order to improve the yield and quality of rapeseed, many farmers will choose to use paclobutrazol, a plant growth regulator. However, the use of paclobutrazol on rape is not simply sprayed a few times, and certain skills and precautions need to be mastered. This article will introduce the use of paclobutrazol in rape in detail, to help you use paclobutrazol scientifically and rationally to improve the yield and quality of rapeseed.
First, we need to understand the role of paclobutrazol. paclobutrazol is a plant growth regulator, which mainly inhibits the synthesis of gibberellin in plants, controls the excessive growth of plant vegetative growth, promotes reproductive growth, and enhances stress resistance, so as to achieve the purpose of increasing yield and income. The use of paclobutrazol on rape can effectively control plant height, prevent lodging, increase the number of branches, improve the knotting rate, and increase yield.
So, how to use paclobutrazol correctly? In the following, we will introduce the three aspects of time, amount and method.
1. Time of use.
The use time of paclobutrazol in rape is generally divided into two times, which are the seedling stage and the sprout stage. The use of paclobutrazol at the seedling stage can control the excessive vegetative growth of rapeseed, promote root development, and improve stress resistance. The use of paclobutrazol at the stalk stage can effectively control plant height, prevent lodging, and increase the number of branches. The specific use time should be determined according to the growth of rape and climatic conditions. Generally speaking, the seedling stage is used for 3-4 leaf stage, and the sprout stage is used for 5-10 cm of sprout height.
Second, the amount of use.
The amount of paclobutrazol used should be determined according to the rapeseed variety, growth and climatic conditions. Generally speaking, 50-100 grams of 15% paclobutrazol wettable powder per mu is sprayed with 50-60 kg of water. Be careful not to repeat the spray to avoid excessive use and cause pesticide damage.
3. How to use.
1.Use at the seedling stage: at the 3-4 leaf stage of rapeseed, use 50-80 grams of 15% paclobutrazol wettable powder per mu and spray with 50 kg of water. When spraying, it should be evenly sprayed on the rape leaves to avoid excessive spraying and pesticide damage.
2.Use at the sprout stage: when the rapeseed sprout is 5-10 cm high, 80-120 grams of 15% paclobutrazol wettable powder per mu is used, and 50 kg of water is sprayed. When spraying, it should be evenly sprayed on the rape plants to avoid excessive spraying and pesticide damage.
When using paclobutrazol, the following points should also be noted:
1.Master the use time: to grasp the growth of rapeseed, use paclobutrazol in a timely manner. Either too early or too late may affect the efficacy of the drug.
2.Strictly control the dosage: use paclobutrazol according to the recommended dosage, and do not increase the dosage arbitrarily. Excessive use can lead to pesticide damage and affect the growth of oilseed rape.
3.Pay attention to the weather conditions: When using paclobutrazol, pay attention to the weather conditions. Avoid spraying in rainy or windy weather to avoid affecting the efficacy of the drug.
4.Rational fertilization: When using paclobutrazol, it is necessary to fertilize reasonably. The application of phosphorus and potassium fertilizer can improve the stress resistance and promote the growth of rapeseed.
5.Pay attention to safety: paclobutrazol is a pesticide and should be properly stored and used. Pay attention to safety precautions to avoid harm to the human body and the environment.
Through the above introduction, I believe you have mastered the use of paclobutrazol on rape. When using paclobutrazol, it is necessary to grasp the time, dosage and use method, pay attention to safety protection measures, reasonable fertilization and strengthen management. Only in this way can we give full play to the role of paclobutrazol and improve the yield and quality of rapeseed.