A small amount of cucumber in greenhouses is a normal phenomenon of plant self-regulation, but a large number of melons must be searched for reasons. The reasons are as follows:
1. The planting density is high, the field is closed, and the light is insufficient, resulting in less phot.......

Raspberry is a deciduous shrub of Rosaceae. It is one of the third-generation fruit that has emerged at home and abroad in recent years. The fruit berry is sweet and delicious, nutritious, has a special rich aroma, in addition to fresh food, but also processing fruit juice, beverages, frui.......

Cucumber downy mildew is one of the most common and most serious diseases occurring on cucumbers. It can occur during the entire growth period of cucumbers, and mainly damages the leaves. After the leaves were damaged, water-stained pale green spots appeared and gradually became yellow-gre.......

Tomato leaf mold is an important disease of tomatoes in protected fields. It mainly damages the leaves, stems, flowers and fruits of tomatoes. At the initial stage, some green spots appear on the back of the leaves, and later it turns into gray or black and purple irregular moldy layers. F.......

At present, the rice in the northeast region enters the heading stage, and the maize is in the stage of anthesis and pollination, and the growth is generally normal. However, it should be noted that due to the effects of low temperature, rain, and sunshine during the period from mid-May to.......