Introduction: application method of plant growth regulator

Application of plant growth regulators on various crops: 1. Application of plant growth regulators on eggplant fruits and vegetables. 1. Seeds treated at green seedling stage can be soaked in 500mg / kg Bijiu or 500mg / kg paclobutrazol for 6 hours and inhibited for one month. The seedling bed of 1 square meter can be poured with 250,500mg / kg dwarf diluent 1kg, or 1000-4000 mg / kg Bijiu and 300mg / kg ethephon diluent foliar spraying, the effect is very obvious. Generally, after 7 days, the seedling growth slows down, the leaf color is dark green, the stem is short and thick, the root / shoot ratio increases, the plant is dwarfed, the flower bud differentiation is not affected, and the dynamic balance between vegetative growth and reproductive growth can be achieved in the same period. 2. During the transplanting period, the transplanted seedlings were soaked in 10-15 mg / kg gibberellin and 10 mg / kg rooting powder No. 4 diluent. Slow seedling period is shortened, new roots are born early, the product can be put on the market about 10 days in advance, and the yield can be increased by about 15%. 3. Spraying the whole plant twice with 50-100 mg / kg paclobutrazol or 50-100 mg / kg metoprolol at an interval of 10-15 days in the early flowering stage of transplanting treatment could shorten about 1 beat 3 of internodes, and the fruit setting rate was significantly higher than that of the control and promoted fruit development. 4. Flowering treatment of eggplant fruit vegetables flowering period is the most likely to intensify the contradiction between vegetative growth and reproductive growth, that is, the most critical period for the application of plant growth regulators. Prevent tomatoes from falling flowers. Before flowering or 1-2 days after flowering (trumpet flower state), use 15-20 mg / kg 2,4 Mel D single dip flower. When 3-4 flowers in an inflorescence are already in bloom, the effect of spraying the whole inflorescence with 30-50 mg / kg anti-falling hormone is very good. When using 2,4 Mel D, we should pay attention to that the flowers can only be half-bloomed or just blooming, and can not be treated without blooming, and the treatment of blooming failure is ineffective; each flower can only be treated once. It is suitable for single flower to bloom 60%-70% of the whole inflorescence when anti-falling element is used. Both of them are used on strong seedlings, and the concentration increases appropriately with the decrease of temperature, but can not be decided by themselves at will. Prevent green peppers from falling flowers. The "three falling" disease of green pepper has complex reasons and cultivation reasons, but the use of plant growth regulators will achieve certain results. Through the test of 2,4-Mel D anticonvulsant, it is effective but also has obvious drug damage. According to other data, it is recommended to use 50 mg / kg tealeacetic acid spray treatment. 5. The tomatoes were plucked after the weight and volume were insufficient and the color turned white (white back). The tomatoes were soaked with 2000-4000 mg / kg ethephon for 1 minute. After being removed and placed in the environment of 20-25 ℃ for 2-3 days, all the tomatoes turned red, 5-7 days earlier than in the field. Compared with the methods of fruit coating and fruit spraying introduced in other materials, the fruit soaking method is recommended from the aspects of coloring uniformity, negative effect on leaves, maneuverability and so on. Second, the application on melons vegetables greenhouse melons generally include cucumbers, zucchini, balsam pear, bergamot and so on. This kind of vegetables are monoecious, pollinate entirely on wind and insects, and can bear fruit unisexually. This determines the great potential for the use of plant growth regulators. 1. Inducing cucumber to produce female flower we know that when the first true leaf of cucumber unfolds, the growth point has differentiated into 12 nodes, and the axillary flower buds of the following 9 nodes have differentiated, but the sex type has not been determined. When the 7th true leaf unfolds, the flower bud differentiates to 23 nodes, and the flower sex of 16 nodes is determined. The number of female flowers directly determines the yield in the early and middle stages. Through the experiment, the whole plant was sprayed with 150-250 mg / kg ethephon twice at an interval of 8-10 days, which significantly increased the number of female flowers on the main vine and inhibited the number of male flowers, which laid the foundation for increasing production. However, each female flower does not necessarily become a cucumber, and it is necessary to strengthen the management of water, fertilizer and cultivation techniques. 2. Prevent melons in greenhouse because of low temperature, short sunshine and poor natural pollination, if the cultivation measures are not ideal, it is recommended to use 200-400 mg / kg gibberellin diluent small sprayer. Foliar spraying can increase the fruit setting rate by more than 30% when flowers are budding, blooming or petals begin to wilt. Zucchini, it is recommended that 30-40 mg / kg of 2,4 Murd should be dipped in the flower base and petal base with a brush before 9: 00 a. M., the effect is very significant. 3. Application on leafy vegetables according to the characteristics that local leafy vegetables focus on increasing yield and putting on the market in advance, several regulators have been tested, and gibberellin has obvious effects on yield increase and early maturity. Click to view more regulator use technology click to view more pesticide use technology click to view more vegetable planting technology click to view more fruit planting technology