Preventing the occurrence of rust Under normal circumstances, if rust occurs in early or mid-August, the affected area is large in the later period, and the control is not ideal. If there is no disease at the end of August, the incidence of disease is low, which is mainly determined by the weather. Therefore, it is necessary to observe the weather changes in the prevention and control of rust in the later stage, and different prevention and control measures can be taken according to the dryness and humidity of the climate.
Preventing anthracnose well. What is worth explaining for anthracnose is that people have misunderstandings in the recognition of the disease. There are similar anthracnose phenomena in the early, middle and late stages of jujube fruit, such as spots appearing on jujube fruit, and then a light yellow halo. Later decay, this is often not caused by anthracnose, but by the infection of other bacterial sources. This situation usually occurs locally and is not harmful. The true anthracnose occurs when the fruit is close to maturity. The initial symptoms are light yellow water stains on the surface of the fruit, and light red marks similar to scratches, which are easily overlooked.
Prevent fruit cracking in the early stage of fruit growth due to excessive soil dryness and entering the color-changing period to the mature period (near-mature period). If continuous rainfall will cause the soil moisture to increase sharply, the roots will quickly absorb water and the fruit will increase sharply and the fruit swelling pressure will increase , Causing the epidermis to burst and crack the fruit.
High temperature and humidity are the external causes of fruit cracking. Fruits with sunburn scars are not resistant to fruit cracking. In case of rain, they will first crack along the sunburn marks and then spread to other parts. The sun surface of the fruit and the first colored part are easy to crack. The reason is also related to the small sunburn scars on the skin after direct light, and the decrease in toughness.
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