The control of peanuts is not easy to implement prematurely. In most parts of northern China, some biological regulators (chlormechanin) can be sprayed to control leggy after mid-July and mid-August. Do not implement the control of Wang in the early flowering period, because premature control of Wang will also lead to early premature failure of peanuts and reduce production. At this time, drought, low rainfall, poor land; rainfall, soil moisture, are susceptible to multiple leaf spot of peanuts (including black spot, brown spot, net spot). With the early appearance of brown spot, serious three conditions occur simultaneously. Spots mostly occur on the front of the leaves, invading the leaves, petioles, and stems of the plants, and there is a tendency to spread around. Some fields are seriously infected during the flowering period, resulting in a large number of fallen leaves and premature aging, which directly affect the yield.

During this period, it can be carried out according to the actual situation (a height of about 45 cm) for chemical control and disease prevention. It is necessary to control legitimacy, promote the formation of fruit acupuncture, prevent premature decline, and prevent the invasion of leaf spot and insect pests.

First, peanuts control the best time

Using plant growth regulators to regulate peanuts, don't want to do it overnight, and control them all at once. This is inconsistent with the growth laws of peanuts. The correct use of methods and principles is a small number of multiple, gradually controlled.

1, the best period: a large number of fruit needles into the soil, this time the first batch of fruit into the soil has a small finger tip so thick, the second batch of fruit needle head like chicken mouth.

2, adequate water and fertilizer, growing vigorously, plant height reached 30 to 35 centimeters.

3, before and after spraying should pay attention to keep the field soil moist, too dry, unfavorable nutrient absorption, and will increase the inhibition of peanuts, resulting in a single kernel phenomenon.

For this year's pre-peanut drought, the seedlings are ideal. It is expected that due to the increase of rainfall after mid-July, the growth rate of peanuts will be accelerated and they will be prolonged. Therefore, the prosecution must be timely.

When the field begins to be ridged, it will be used for the first time, approximately on July 22-25. Then according to the growth and climate conditions, the plant height is 45-50 cm, the second application is about the time of August 10-20, and it is better that the plant height does not exceed 60 cm when the peanuts are harvested.

Second, Peanut-controlled comprehensive management technology

This stage is generally high temperature and high humidity, and it is also a stage where peanut brown spot, black spot, scab and other diseases are easy to occur, and it can be combined with Wang Wang with efficient broad-spectrum fungicides to control leaf diseases.

In addition, peanut leaves, fruit acupunctures and pods can absorb nutrients at this time. The development period of pods is a crucial period for nutrition, and at the same time, the deficiency is caused by yellowing. At this time, we must pay attention to the nutrition of foliar nutrition and try our best to supplement nutrition. Liquid fertilizers. According to the actual situation, it is possible to combine bactericidal and nutritive additions.

Precautions

1. Peanuts after flower control should pay close attention to field growth, strengthen management, and prevent the occurrence of leaf spot and premature leaf failure.

2, timely harvest, harvest too late, bad fruit, affecting yield!

During the growing period of peanuts, the water is abundant, the temperature is high, and the growth rate is quickened, which can easily cause the stems and leaves to grow long.

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