Key points of spring tube techniques in orchid cultivation and prevention and control of diseases and insect pests of edible fungi

After the beginning of spring, the climate changes greatly, and there are many cloudy and rainy days, and there are often cold waves, which is very disadvantageous to the growth of orchids. At this time, if the management can not keep up, it can easily lead to rotten roots and buds of orchids, or even the death of the whole plant.

Heat preservation and waterlogging prevention: for orchids and spring orchids in full bloom in spring, indoor management must be placed to protect flowers and flowers, because overcast, rainy and cold weather will shorten the flowering period, such as being watered by cold rain, it will also cause flowers to rot. For the budding Jian Lan, Han Lan, etc., can be placed outdoors, must pay attention to the orchid basin drainage and waterlogging, it is best to set up a plastic film above the orchid basin to cover the rain. During this period, orchids must avoid all fertilizers, and the potted soil should be kept slightly wet, otherwise, the new buds of Jian Lan and Han Lan will rot, and the tip of the buds will rot into black brown, which extends to the brown death of the whole bud, commonly known as "black death." The rotten spring buds will seriously affect the growth, reproduction and flowering of the whole orchid in that year.

Prevention and control of diseases and insect pests: it is cloudy and rainy in spring, and it is a frequent period for all kinds of diseases and insect pests. High humid environmental conditions will not only lead to the occurrence and aggravation of orchid brown spot, but also cause the damage of snails, aphids, ground tigers, mole crickets and other pests. For brown spot, 50% carbendazim or 70% topiramate can be sprayed for 2 to 3 times at an interval of 7 to 10 days. Manual hunting is the main way to kill pests, keep the orchid basin and its surroundings clean, and spread quicklime to prevent pests from drilling into the basin from the hydrophobic holes in the basin wall and bottom.

Timely fertilization: the orchids and orchids that have passed the flowering period should be fertilized in time, and it is better to apply thin horseshoe water and spray 0.1% potassium dihydrogen phosphate solution on the leaf surface to promote the spring style. May is the fertilizing period for all orchids. 50 to 100 grams of slow-acting organic fertilizer grains and bone powder can be buried along the edge of the orchid pot. The strong bud fertilizer is sprayed every week, and the fertilizer solution is 0.1% potassium dihydrogen phosphate. In order to prevent the disease, topiramate or carbendazim pesticide can be added.