Manage fruit trees such as peaches, plums, pears, and apples that are not pruned or trimmed for a long time. Commonly there is a pair of puffed mistletoe, mistletoe, miscellaneous parasitic, or densely wounded dodder; the planting density is high and the air humidity is relatively high. Th.......

There are many kinds of chemical fertilizers, and there are more than 10 commonly used ones. Some fertilizers used in vegetables can improve the quality and yield, but some fertilizers can increase the yield when applied to vegetables, but it will cause toxin contamination of vegetables, c.......

Research progress on freeze-drying technology of protein drugs

1 Introduction

Since the lyophilized drug is porous, can be stably stored for a long time, and is easy to re-rehydrate to restore activity, the freeze-drying technique is widely used.......

Symptoms of the disease are mainly infested with leaves and sheaths, as well as stems and panicles. A round, brown-colored bulge (scrubs) was scattered in the affected area. When the barley matures, it produces a smaller black, nearly rectangular teliospore, buried in the epidermis.
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The Chinese bee is a native bee species in China, and breeding bees are one of the ways for farmers in mountain and semi-mountain areas to increase their income. In the breeding process, the control of pests is the key to the production of bee products. The main pests of Chinese bees are t.......

Field Symptoms: Verticillium wilt on eggplant occurs more often after fruiting on the pod, and the number of diseased plants increases sharply during the fruiting period. At the early stage of disease, the middle and lower leaves of the plant chlorosis or chlorosis on the middle and lower .......

Release date: 2009-07-22

China's minimally invasive surgical equipment research and development situation is gratifying
Minimally inva.......

Citrus acacia (Aleu-rocanthus spiniferus Quaintance) is classified as Homoptera and Pteromidae. In addition to harming citrus, it can also harm dozens of plants.
Hazardous characteristics? Citrus nigra powder is harmful to the fixed suction juice on the b.......

1. The high temperature makes the water tank .......

Soilless cultivation refers to a cultivation method in which a nutrient solution is poured without using natural soil. In the production of vegetables, it has the advantages of high yield, early maturity, water saving, light disease, and the ability to produce pollution-free quality vegeta.......