(2) Skillfully spraying plant growth regulators in the "grasping period" has strict requirements on the application period. Only when used in a suitable period can it play a role in exerting drug effects and avoiding phytotoxicity. For example, spraying gibberellin at the young fruit stage of citrus can improve the fruit setting rate and increase the yield. If it is applied too early, spraying gibberellin at the flower bud differentiation stage of citrus will inhibit the formation of flower buds and have the opposite effect. The application of clofenuron at flowering stage will keep the fruit and increase the yield of watermelon, but the application at later stage will affect the yield. Thibenuron should be sprayed when cotton balls, cotton balls, cotton balls, cotton balls, cotton balls, cotton balls, cotton balls, cotton balls, cotton balls.
In addition, the dosage should be calculated accurately when applying pesticide, and the concentration should be prepared accurately in strict accordance with the crops and adjustment purposes on the registration label of plant growth regulators, and the dosage and water quantity should not be increased at will. Spraying frequency should also be based on product label instructions.
(3) Drug-preserving effect of "selecting the right instrument" Choose the application instrument and treatment method according to the application method. As far as stem and leaf spraying is concerned, a motorized sprayer or a backpack sprayer should be used in a large area, a manual sprayer should be used in a small area, and a rod sprayer should be used for fruit trees with high spraying. Before use, the sprayer should be cleaned. If the sprayer has been sprayed with other pesticides, it should be thoroughly cleaned several times before use, so as to avoid the residual liquid of the last pesticide affecting plant growth.
(4) "Correct application" is to ensure that the application method of plant growth regulators is more complicated than other pesticides. There are some treatment methods, such as spraying plants evenly, smearing or dipping flowers locally, soaking fruits, smearing, fumigation and so on. The correct method of use should be selected according to the characteristics and purpose of use of chemicals. Drugs should be prepared in strict accordance with product labels and instructions for use, and used in conjunction with them. The medicine prepared that day was used up that day. When the mixing effect is not clear, it is forbidden to mix at will, especially when the pH value of the two is quite different, and it should not be mixed blindly, nor should it be mixed with pesticides such as foliar fertilizer without test.
(5) Look at the sky, the ground and the crops. The application should be carried out in windless, sunny weather with suitable temperature and humidity, and it should be avoided before rainfall and under extreme weather (too high, too low, drought, etc.). ), so as not to affect the efficacy and produce phytotoxicity. The role of plant growth regulators is closely related to plant growth and water and fertilizer management. For example, when there is more rain and wheat, corn and other crops grow vigorously, spraying inhibitory plant growth regulators can prevent excessive growth. In cotton fields with good fertilizer and water conditions and vigorous growth, methyl methylphenidate can be sprayed to prevent cotton plants from growing vigorously, but it cannot be used in cotton fields with dry weather and poor growth.
(6) "Safe medication" is more important. During the preparation, use and storage of plant growth regulators, you should wear protective articles and pay attention to the safety protection of users and people around you, especially to avoid contact and use of children, the elderly, pregnant women and lactating women.
Dispensing needs to choose a suitable preparation site and prepare it outdoors with good ventilation, away from grain, fire, water and animals. You can't take water directly from rivers or wells with a bucket of potions. When preparing powder, try to avoid dust flying in a windless place or windward place. Don't fill the sprayer with liquid medicine outside the scale line to avoid spilling.
Don't eat, drink or smoke when dispensing or taking medicine. Don't pollute the potion on you. If it gets into your eyes, rinse it with clear water immediately. Put on clean clothes immediately after spraying, rinse hands, face and other exposed parts with clear water, and wash clothes with soap. If you accidentally take it by mistake or have symptoms of poisoning during operation, you should immediately send it to the hospital for treatment.
After application, the instruments used should be cleaned up, and the washed waste liquid and product packaging should be properly disposed away from the residence, water source and other crops. Do not clean spraying equipment and protective equipment in rivers, fish ponds, wells and other water sources. Do not spray chemicals on wells, other water sources, feed, food and non-target crops.
Warning signs should be erected in the field after spraying to inform passers-by that plant growth regulators should be used here, and fruits and vegetables should not be eaten in safe intervals.
The rest plant growth regulators should be stored in a cool, ventilated, dry place with suitable temperature to avoid exposure to sunlight, moisture and freezing. It should be locked and stored to avoid accidental maintenance and misuse. The storage site should be far away from dormitory, food, feed, seeds, fertilizer, etc. Flammable chemicals should be kept away from fire and heat sources, and should be handled with care.