According to the types of crops, different crops have different sensitivity to green plant growth regulators. For example, rice seedling emergence is very sensitive to paclobutrazol. In hybrid rice seed production, it is sensitive to "92O" in order to cope with the unexpected flowering period. Seed soaking, root irrigation or spraying with cotton wool are sensitive to "802", while yellow leaf disease in bud stage and flowering stage is sensitive to mepiquat chloride and chlorhexidine. Wheat is sensitive to chlormequat before heading. Maize is sensitive to DF- 1 Compared with peanut, paclobutrazol is more sensitive. Soybean and tomato are sensitive to 2,4-D and tomato essence. Fruit trees are sensitive to "92 O"
According to the appearance of crop growth, for example, when the flowering period of hybrid rice seed production is not reached, the application of "92 O" to adjust the flowering period can improve the panicle rate. If yellow leaf disease occurs in rice or peanut seeds, paclobutrazol should be used to promote the stable growth of strong seedlings. For example, when the cotton boll period and the cotton boll period are extremely long, you can choose a small number of meals and spray mepiquat chloride in a light and heavy way to help keep fit. In order to promote cotton bolls to vomit and pull out early, after autumn peaches are perfected, ripening agents such as ethephon or ethylene diphosphate can be sprayed in a suitable temperature range. Regulators such as 2,4-D and tomatoes can be used to prevent soybeans and tomatoes from falling. To avoid lodging of wheat seedlings, chlormequat chloride and mepiquat chloride can be used. DF- 1 can be used to prevent corn from dropping seedlings.
According to different natural environments, the effectiveness of organic chemical control is usually closely related to temperature, light, environmental humidity and soil humidity. Generally, in a suitable temperature range, the higher the temperature, the better the actual effect. When the temperature is high, the concentration of the regulator should be low, and when the temperature is low, the concentration should be moderately increased. When the temperature of street crops is too high or too low, it will hinder the full play of green plant growth regulators. However, under bad weather conditions, the actual effect of applying 2,4-D or anthocyanin to tomatoes is remarkable.
Everyone has different views and ideas about today's content. You can leave a message and discuss together. Looking forward to your reply! If you like this article, don't forget to help like it? , comment, forward and collect.