Detailed explanation of peanut growth control techniques: master the timing to boost high yields
During periods of high temperature and frequent rain, peanuts are highly prone to excessive vegetative growth. Once peanuts grow excessively, their vegetative growth surpasses their reproductive growth, which is detrimental to high yields. Therefore, growth control measures must be taken during this period. So how exactly should this be done? Come along with the editor to take a look at the detailed introduction.
1. Reasons for growth control
During the peak growing season of peanuts, improper management can lead to runaway growth and spindly overgrowth, with only stems and leaves growing and no pods setting, seriously affecting peanut yield. It wastes fertilizer and soil fertility. If not controlled in time, it will cause the plants to grow too tall, and the stems, due to rapid growth, become thin and weak, making them highly prone to lodging. It will also cause nutrients to be diverted to stem and leaf growth, leaving the pods without sufficient nutrients for growth, resulting in poor pod filling and reduced yield. Therefore, growth control is imperative to inhibit vegetative growth and shift it toward reproductive growth, making the pods plump and achieving the goal of increasing yield.
2. Timing of growth control
The timing of growth control is extremely important. Too early will lead to reduced yield, while too late will fail to achieve the desired effect, so an appropriate time must be chosen for growth control. The best time should be when a large number of pegs are entering the soil, with the plant height maintained between 30-40 cm. Of course, different varieties have different height control thresholds. Generally speaking, for large-pod varieties, the height should be controlled at around 40 cm, while for small-pod varieties, the height should generally be controlled at around 30 cm.
3. Selection of growth control agents
The growth control agent commonly used in production is paclobutrazol. This is because paclobutrazol is used in large amounts, which can seriously affect the growth of peanut pods, causing the pod shape to shrink and increasing pod shell thickness. However, note two points: first, if applied too early, it will aggravate leaf diseases, causing leaves to wither and drop prematurely and leading to premature aging of the plants; second, paclobutrazol persists in the soil for a long time, which can also affect subsequent crops, so it is not suitable for continuous cropping.
4. Spraying growth control agents
When using growth control agents, pay attention to several points. First, apply multiple times in small amounts, meaning growth control should be carried out in several applications to avoid spraying an excessive amount of chemicals at once; generally, no more than 40 grams per mu. Second, spraying should be done after rain; if rain occurs within 6 hours after spraying, re-spray once after the rain. Third, a small amount of neutral laundry detergent can be added to the solution to enhance the absorption capacity of the leaves. Fourth, when spraying, try to direct the spray at the peanut growth nodes and avoid repeated spraying.
The above is an introduction to peanut growth control techniques. I hope it can help you. If you want to learn more related knowledge, please stay tuned to us.