In many places visited by the author, most cotton farmers do not pay attention to timely and appropriate chemical control, which often leads to the imbalance of vegetative growth and reproductive growth of cotton plants. The plants are barely long, the fruit section is elongated, the axillary buds are clustered, and the budding bells fall off seriously. Cotton plants are "high, large, and empty", and they often fall down when they encounter wind and rain, causing unnecessary losses. "If you want to control every year, bad control every year" is a true portrayal of most cotton farmers.
Question one: Most cotton farmers' knowledge of dilute amines only rests on the superficial understanding of control, and it is not known that dildocarb is important for cotton production. (Details of specific roles are detailed later). At the same time, it is "not prosperous, not controlled, prosperous", the result? ! Either it is "uncontrollable" and the plants are mammoth; or it is "not long enough to control" and then used fertilizer to urge and use drugs to solve, causing the cotton plants to suddenly grow rapidly and suddenly almost stop growing, resulting in uneven distribution of fruit branches and vegetative growth. Seriously incompatible with reproductive growth.
Question two: The current market is full of many products such as "reduce gold", "eight nothing", "pruning bell", and the cost of use is much higher than that of condensation amine. For the time being, these products are really "magical" "? ! In actual fact, these products are mostly foliar fertilizer products with nutrient plus dihydimine or chlormequat (see product registration certificate number), and some even directly reduce the content of dilute amine to a new one. The product name only! Of course, such a goal is to save farmers more money! Due to the high cost (1.50 to 2.50 yuan per mu for this kind of product during cotton flowering, and up to 0.50 yuan for the good quality of the dilute amine), the number of cotton farmers used is small, and the total amount of drugs is insufficient, directly affecting Control effect.
Question 3: At present, some “experts†and “professors†who teach classes to the countryside are also very misleading to ordinary cotton farmers. What to say “Cotton control three or four times on the lineâ€! Actually, these are just some "selling-understood" sellers who are "dealing with hardships" and "talking on paper". (The questions about these people can be found in one of the series of articles in the "Seed Selection" section). Actually it does not work!
Special reminder: As of now, scientific experiments show that there is no application of a chemical agent on cotton to replace the effect of condensation amine. Some advocate the use of two plant growth regulators, "Chlormequat" and "Paclobutrazol," which are not suitable for use on cotton.
The controllability and use technology of dildoamines: D-amino acid, also known as piperidine, mepazine, mesozolic, etc., is commonly known in English as Mepiquatchloride. The national standard of the Diclocamine powder is that the content of the active ingredient is ≥96%, the content of the impurity is ≤1.5%, and the effective content of the dilute-saltamine aqueous solution (chicken auxin) is ≥25%. Note that if the content is insufficient and the impurity content is high, the use effect will be directly affected. When purchasing, it is necessary to choose a product that meets the national standard and has a better brand. Generally, the effect is achieved within 3 to 5 days after use, and the effective period is 15 to 25 days (differences in usage, rainfall, variety sensitivity, and growth).
In use, we should master the principle of "a small number of times, light control and control, before light and heavy" principle to ensure that the cotton plant "strong but not strong, steady growth." The overall requirement is that it is appropriate to reach about 1 meter in the later period of cotton. The coated cotton seeds cannot be soaked. Generally, they can be used for the first time in the initial stage of bud emergence when 8-9 leaves of cotton are used. The first use should be “very slightâ€, and it is appropriate not to have obvious effects, so as to lay a good foundation for determining the amount of the next use. Afterwards, it is necessary to grasp “control over drugs and control over time†or “interval control once†(according to strength, rainfall, and growth). The amount of polyamines used in different growth stages: 0.3 to 0.5 grams in the threshing period, 0.8 to 1 gram in the early flowering period, 1-3 grams in the flowering period, and 3 to 6 grams after the topping. In practice, the "one-time amount, three-time use" effect is the best.
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