Fang Zhai more than ten acres [system]

Encountering large-scale plant diseases and insect pests, even a good planter, often can only be at a loss.

As a half-assed agricultural expert, Yu Rong had no choice but to rush the ducks to the shelves. He turned over the encyclopedia of medicinal plant cultivation overnight, carefully read, figured out and memorized the detailed descriptions of various diseases and insect pests, as well as the methods for their prevention and treatment.

He rushed to Xiao'er Mountain early the next morning, and followed He Manzi to the slopes where pinellia was planted to check the situation.

In the process of pinellia planting, the common diseases and insect pests mainly include bulb rot, leaf rot, and viral diseases. Except for climate and soil factors, the diseases are basically caused by insect pests and fungal hazards.

Although some are not involved in production, Yu Rong's theoretical knowledge is still good. Before asking He Manzi to plant medicinal materials, he considered this issue, and made prevention and control preparations earlier. In order to prevent insect pests and fungal hazards, the slope land selected is not only suitable for planting, but also considers the high temperature and rainy conditions.

In fact, before the first season of pinellia was harvested, there were no cases of diseases.

He Manzi is worthy of being a professional grower. He removed the infected plants as soon as possible, burned them and buried them deeply, and irrigated the diseased spots with lime water...The emergency measures are very effective, but they are far from enough. After all, the problem of pests and diseases is very complicated , There are also many different triggering factors. The effective means for a certain situation may not only be useless in another situation, but even counterproductive.

For example, the pests and diseases encountered in the second season of pinellia caught He Manzi by surprise.

Yu Rong didn't blame the other party's negligence, but it was limited by the level of productivity. Agricultural production in this era is mainly dependent on the sky. Although Min Dynasty has relatively improved a lot in farming techniques such as fertilization and irrigation, the grain yield per mu has gradually improved. Improvement, but for diseases, insect pests or fungal damage, he is the most powerful planter, and he can often reach the level of He Manzi.

——Plant ash, which is mainly used as fertilizer, has the function of preventing and controlling pests to a certain extent. In addition, it is to pull out and burn diseased plants, use lime water to kill insects, and at most use the excrement of rabbits, sheep and cattle.

Of course, there are no modern pesticides and herbicides for all kinds of diseases and insect pests. Even the "soil pesticides" that Yu Rong had only a concept before had not been applied in production at this time.

Return to the present.

Most of the diseases encountered by pinellia on slopes are caused by aphids, as well as pests such as hornworms and thrips.

The situation was very serious, Yu Rong acted decisively and taught He Manzi to make a simple but effective "pesticide".

Wild Artemisia can be seen everywhere in the countryside, castor planted in every household, and common trees such as willow, neem, etc. Take the leaves, bark or fruits, mash them and mix them with water, boil them in a large pot, and cool the filtrate. Diluted with water and sprayed on the ground and fields, it has miraculous effects on aphids, hornworms, thrips and cabbage caterpillars.

He Manzi, who has been dealing with medicinal materials for many years, is very familiar with the medicinal properties of various plants. After Yu Rong's hands-on teaching, he suddenly understood and got started quickly.

After using the pesticide, Yu Rong stayed in the slope again, observed for a long time, and gradually relaxed his mind.

After returning home and having a simple dinner, the young doctor went to the pharmacy to get dozens of common medicinal materials that can repel insects, sterilize bacteria, or contain toxins, and hurriedly entered the quiet room to start research.

One is to study "pesticides".

Different pests and diseases require different medicines.

For example, deer vine has special effects on various caterpillars; tea meal can not only kill snails, slugs and other molluscs, but also can prevent rust to a certain extent; castor and peach trees are effective against underground pests; The reproduction of some harmful fungi; maple leaves, some animal feces, and plant ash are used as both pesticides and fertilizers...

After staying up for half the night, Yu Rong drew up more than a dozen kinds of pesticide formulas that could be used to control diseases and insect pests with good effects. Considering that they were used for production, they all chose the most common medicinal materials in the mountains and fields.

"Pesticides" are put aside for the time being, and the specific effect has to be tested in practice.

The second research is much more troublesome, and it is countless times more difficult than the development of pesticides - how to make "herbicides" by yourself.

The use of "soil pesticides" has a long history in the Celestial Dynasty. Even though Yu Rong didn't know much about this aspect before, with the help of the system, the initial research went smoothly.

It is a bold attempt for him to make herbicides from Chinese medicinal materials.

Even in modern times, weeding is sometimes done manually.

Yu Rong didn't think about researching a chemical that could kill all weeds—it was unrealistic and too dangerous—whether it was pesticides or herbicides, he didn't want to cause damage to the ecological environment.

If no herbicides are used at all, some parasitic weeds are too troublesome. No matter how much manpower is invested, there is no way to clean them up, seriously affecting the growth and harvest of crops.

The most typical one is dodder.

The danshen planted by Yu Rong was harmed by dodder.

The Salvia miltiorrhiza, which was planted almost at the same time as the first season of pinellia, was basically free from any diseases and insect pests. However, due to the rapid spread of dodder, the leaves of the medicinal plants turned yellow or even nearly died in several fields.Although Cuscuta itself is also a kind of medicinal material, it is not as good as Danshen in terms of medicinal and economic value.

If the dodder is not removed as soon as possible, the shoots of the ungrown salvia miltiorrhiza will wither, and in severe cases, the whole plant may die, which will greatly reduce the harvest yield.

The development of herbicides is imperative.

Unfortunately, there are some references to the use of "soil pesticides" in the Encyclopedia of Plant Cultivation, but there is no mention of herbicide formulas at all.

Yu Rong could only explore first. Fortunately, the research on pesticides provided him with some ideas, so he took medicinal materials containing growth-inhibiting ingredients—most of which also have insecticidal effects—such as tripterygium wilfordii, mugwort leaves, and neem seeds. The equipment extracts the ingredients, synthesizes them, concentrates them into medicinal powders, and then uses the system to identify and evaluate the efficacy of the medicines.

It was not smooth at first.It is not difficult to make a drug that inhibits plant growth, but the difficulty lies in the specificity of the herbicide, which must not harm the plant itself, but can effectively kill harmful weeds... The requirements are demanding, and various problems continue to arise during the research process.

Yu Rong was not discouraged.

If you think about it, you will know how much time and manpower was spent on modern pesticides and herbicides, and how many times they failed before they finally achieved results.If it wasn't for the lack of a system, relying on his own strength, it would be whimsical to figure out what happened in just a few days.

Fortunately there is a system.There is also a large amount of precious information stored in the virtual space, as long as he spends contribution points, he can avoid countless detours.

but……

Even if the system provides countless conveniences, the actual effect of the "Herbicide No. [-]" successfully developed by Yu Rong is not optimistic, especially for dodder, basically it has no effect.

Seeing the danshen field, Cuscuta had spread to nearly a quarter of the area, and the Li brothers spent most of their time weeding, but they still couldn't get rid of it. They were so depressed that they paced back and forth by the field every morning.

Suddenly, he thought of "fighting poison with poison". Cuscuta's growth mechanism is very special. It contains ingredients that inhibit cell reproduction and reproduction, which are effective for humans, animals and plants, and then think of its own strong reproductive ability...

It's a burst of inspiration.

Huang Tian deserves a caring person.

On the day before his birthday, Yu Rong successfully prepared "Herbicide No. [-]" by using Cuscuta as the monarch drug, Tripterygium wilfordii, Baibu, and Morning Glory as minister drugs, and supplemented with neem, mugwort, Cnidium, etc., and the system evaluation was Barely qualified, he was delighted to be named "Dodder Spirit".

On his birthday, early in the morning, he took the "herbicide" powder that he made last night, mixed it with water, waited patiently until the morning dew evaporated, and rushed to the field impatiently, using the watering can to water the flowers, spraying Agents... Herbicides are quite toxic and should not be in direct contact with the skin.

I don't know if it's a psychological effect, but when Yu Rong returned to the field after spraying all the potions, he always felt a little slumped when he saw the dodder that had been sprayed with herbicide the first time.

Wearing work clothes, the young doctor is holding a wooden watering can, unconsciously swinging back and forth on the field ridge.

"Rong'er."

After an unknown amount of time, this familiar call woke up the person who was immersed in emotions and could not regain his senses.

Yu Rong turned her head and saw the man in the martial uniform. Without even thinking about it, she quickly walked up to him, suppressing a trace of excitement, happily sharing her joyful mood: "Brother Xin, let me tell you..."

"Call me brother."

"Brother," the young man who was full of worries, had no time to think, and changed his words without thinking, "Come and have a look."

As he spoke, he grabbed the man's arm with one hand and walked towards the field full of soybeans.

Nie Xinzhi followed Yu Rong's instructions and looked at the thin light yellow vines clinging to the bean stalks.

"Look at the dodder over here."

Nie Xinzhi turned his head and saw the dodder spreading on the branches of salvia miltiorrhiza not far away, and glanced at someone with a happy face: "What do you mean?"

Yu Rong opened his eyes slightly, and asked back: "Can't you see the difference between these two dodders?" The soybeans on the ridge of the field have not yet been sprayed with herbicide.

Nie Xinzhi discerned it carefully, and after a while, said: "But the growth is different?"

Yu Rong nodded quickly, and said with a smile: "I'm sure I'm not mistaken, I didn't expect this dodder to work so quickly." After that, he was a little doubtful, "I don't know if the effect is too strong, and it will cause harm..."

It took effect within a few hours, and it reminded him of "paraquat" all of a sudden, which made him feel uneasy-thinking of the countless cases of suicide by drinking paraquat in modern times, he suddenly felt cold and his hairs stood on end.

"No, I have to study it again." Frowning, Yu Rong muttered to himself, turned around and wanted to go home.

"Rong'er."

"Ah, I almost forgot about you, I'm sorry, Brother Xin..."

"Call me brother."

Yu Rong couldn't help being speechless.Is this guy a repeater?Complaining like this in his heart, he compromised: "Understood, brother."

Nie Xinzhi responded calmly, "Yes."

Yu Rongren couldn't help laughing, laughed for a while, and picked up the watering can and wooden barrel containing the herbicide.

"Go home first. Let me show you the results of the recent period... Hey, if it wasn't for something... cough cough cough! I almost went crazy, I lost a lot of hair, and finally made pesticides and weed control agent."

"What are pesticides and herbicides?" Nie Xinzhi continued the topic cooperatively.

"Pesticides, as the name suggests, are..."

The two walked side by side on the country road, and the sound of their conversation gradually drifted away.