At present, pay close attention to the prevention and control of millet diseases.
Recently, many farmers have reported that millet diseases are serious. after our investigation, we found that millet fields are mostly mixed with several diseases, mainly gray leaf spot, leaf spot and blast, which occur widely. Remind the broad masses of farmers to prevent and control them in time.
The main results are as follows: 1. there are differences in the occurrence degree of diseases among different millet varieties. according to the investigation, it is found that the diseases of Honggu and common millet varieties are more serious, while Zhangzagu 8 is lighter.
Second, the symptoms showed that the disease infected the middle and lower leaves of millet plants, and no disease spots were found on the newly grown leaves. The middle and lower leaves are densely covered with disease spots, which are brown spots at first, then oval or fusiform, whitish in the center and reddish brown at the edge. Some plaques have yellow halos.
Third, the cause of the disease is that Julu County has more cloudy and rainy days in July and August. According to the statistics of the county meteorological bureau, the cloudy and rainy days in July reached 12 days. Since August, it has been basically cloudy and rainy, with high air humidity. However, millet gray spot, leaf spot and blast are easy to occur in rainy season and high air humidity, so the disease of millet this year is more serious than in previous years.
Fourth, control measures: spraying 70% methyl topiramate or 50% carbendazim to control gray spot and leaf spot, and spraying 6% spring leomycin wettable powder to control grain blast. In view of the mixed occurrence of these three diseases this year, 70% methyl topiramate + potassium dihydrogen phosphate can be sprayed to control.
- Prev
There are ways to control the growth of wheat seedlings and promote their strength.
Before winter, the wheat seedlings flourished, the growth period was advanced, the nutrient accumulation decreased, and the cold resistance decreased, which was not conducive to safe overwintering. Can be classified management according to the reasons for prosperity, control prosperity and promote strength. The main results are as follows: 1. The leaves of prosperous seedlings formed prematurely are slender, the tillers are insufficient, and the main stems and some large tillers enter the two-edge stage before winter. This kind of wheat seedlings are often strong in front and weak later, and will be frostbitten at a low temperature lasting 5 hours and 10 ℃ in winter, which should be suppressed in time to inhibit the growth of main stems and tillers of wheat seedlings and control overgrowth. The crackdown should be carried out on a sunny morning with frost or dew
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Reasons for the delay in tillering of small rice seedlings
1. Rice evil seedling disease: the pathogen of rice evil seedling disease overwinters on grain and straw and uses diseased seeds or straw the following year. The pathogen propagates with seed germination and invades from the coleoptile or wound of the seedling, causing the seedling disease to grow. Diseased seedlings often wither and die. The unwithered diseased seedlings are yellowish green, grow slender, generally about 1/3 higher than healthy seedlings, and have poor root development, few tillers, or even no tillers. After transplanting the diseased seedlings, the germs are brought to the field, causing the disease of rice seedlings. When the rice is heading
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