Song Yuanhuanzhi

[One bucket = ten liters, one liter = ten heels, one liter ≈ 3 catties (refer to the Han Dynasty conversion)]

Method [-]: Mulberry leaves, add [-]% water to [-]% water, boil it and rub it until rotten, add water to the filtered stock solution and use it four times.

Method [-]: Soak the roots of neem tree in about three buckets of water in advance for [-] days, rub them several times during the soaking period, and then put them together in a pot and boil them for about [-] quarters of an hour. Yellowish-brown Serve mother liquor.

Both of the above are against red spiders.

In addition to the prevention and treatment of red spiders, under Song Yi's unremitting efforts, he discovered that Qiu Mudan can prevent and control heartworms.

Chop the autumn peony and put it in a pot, add five times of water, boil it to form a mother liquor, add fifteen times of water for spraying.

Fu Yuanzhi smiled when he received the letter from Song Yi.

Fu Yuanzhi continued to walk to the experimental table.

For the convenience of comparison, he borrowed two desks from Lizheng.

There are two tables, one has only a few wooden boxes, the other is the opposite, it is packed!
The few belong to Xiaozheng's family, and the many belong to other families.

During this period of observation, he probably knows the natural enemies of the heartworm.

The cocoon under the caterpillar's belly that was first discovered before was indeed not its own offspring. What hatched was another yellow insect with wings and sharp thorns on its abdomen, which looked like a bee.

Fu Yuanzhi tentatively called him the Trichogramma, as the name suggests is a bee with red eyes.

Now, some heart diggers in other people's fields are gradually looking like the caterpillars he found from Niuwa, and they are protecting the cocoons in their abdomens as guardians.

However, the process of change is also very suffocating.

The Trichogramma parasitizes its own eggs in the heart diggers. The heart diggers eat round and smooth at first, but their physical condition is getting worse day by day.

As the Trichogramma larvae in its body gradually grow up, it is visible to the naked eye that the heart digger gradually loses its ability to move.

On a certain day, while observing, Fu Yuanzhi discovered a very inconspicuous exchange protrusion on the stomach of a heart digger. Something is wrong, it seems that there is something struggling in the stomach of the heart digger, just like the seedling that is about to break out of the ground.

Every time it bulges, you will feel that the skin of the heartworm is getting thinner, and when the skin is almost transparent, it is the moment when the things inside come out.

The white larvae are like maggots.

They didn't drill out the whole body, leaving about one-fifth of the body inserted in the heart digging worm, and they were next to each other.

If Fu Yuanzhi hadn't left all this time, he would have thought that the heart digger had given birth to densely packed cubs.

Those wriggling little larvae poured out of the heart digger's body, and they wriggled around the heart digger.

Fu Yuanzhi could see that from the moment they came out, they didn't need food, maybe they were still absorbing the nutrients in the heartworm's body, the first thing they did when they came out was to spin silk, presumably the little white ones I saw before Cocoons are a layer of protection they put on themselves.

At this time, the heart digger lost its fat appearance.

Its body shrank rapidly with the birth of those larvae, and directly shortened by a third of its length. Its body was like a deflated ball, and it also had "wrinkles".

With its last breath remaining, it will protect the cocoons one by one after the cocooning of the heartworm, that is, add a layer of silk to strengthen the cocoons, and then it will not eat or drink day and night. Guarding the cocoon underneath.

Even if there are other small insects approaching, it will drive them away. When the larva breaks out of the cocoon, the heart digger will be exhausted, and the Trichogramma can be said to squeeze out the use value of the heart digger.

When Fu Yuanzhi recorded the process in the book, he also wrote in small characters next to it: the Trichogramma reproduces by parasitizing the heart digger, and the heart digger dies when the Trichogramma grows up. Insects treat Trichogramma larvae like their own children, and the whole action is like a mother's love for her children but also like a thoughtless puppet.

After Fu Yuanzhi stopped writing, he was thinking about a question repeatedly in his mind.

Now, he can probably conclude that the natural enemy of the heart digger is the Trichogramma.

However, whether the Trichogramma can survive the journey he took to the capital is a question.

South-to-north transport of bees is not south-to-north grain transfer.

Once the food is picked, it can be transported directly, but this Trichogramma is different, it is alive, and it cannot be allowed to die.

In addition, the process of capture must not allow it to be injured, otherwise the probability of surviving is even smaller.

In fact, it is also possible to consider capturing and transporting all these heart digging insects, but not all heart digging insects have Trichogramma in their bodies.

Fu Yuanzhi thought about the situation of Xiao Zheng's family. Since there are many heartworms in his field, he should catch a certain number of Trichogrammas and throw them into Xiao Zheng's field.

However, it is already the harvest season. This year, because of the weather, everyone generally started planting in May. Now it is also the harvest season. I don’t know if he will continue to plant the second season.

Of course, most families in the village were already planting the second season of wild wheat when he first arrived in Changliu Village, but Xiao Zheng's family was a little special.

Xiao Zheng's land is all in that area. Even if the Trichogrammas are caught immediately and released, the effect may not be seen until the end of the year, or next year. It takes too long.

Fu Yuanzhi was thinking about the situation in the capital. He came here to find a solution years ago, and he tapped the table with his fingers.

Thinking about it this way, he might not be able to see the situation of Xiao Zheng's family.

The current situation in the capital is urgent. Although Song Yi has found a way to temporarily suppress the spider mites and heartworms, the symptoms are not the root cause. Only the Trichogramma can fundamentally eradicate the heartworms.

Fu Yuanzhi asked Li Zheng to call Xiao Zheng into the room.

Little Zheng Heli was looking over the two tables.

Xiao Zheng has a straightforward temper, and because he has no money or food, his temper is even more irritable. If Fu Yuanzhi is not an official, he would want to lose his temper and let the other party have something to say directly.

Lizheng saw something from it. He pointed to the wooden box on the table of other people in the village, and said, "Master Fu, this is why you don't have many heart diggers, right?"

Fu Yuanzhi nodded.

After listening to Xiao Zheng, he looked carefully again, but he still didn't see anything tricky.

Fu Yuanzhi explained: "Xiao Zheng's land is remote, and the heart diggers from other families in the village have already had enough Trichogrammas to breed, so they didn't reach Xiao Zheng's land."

Li Zheng said, "Trichogramma?"

Fu Yuanzhi nodded: "I got it for the time being. It has red eyes and a tail needle, so I will call it this name for the time being."

Lizheng and Xiao Zheng looked at each other, and Xiao Zheng said, "Sir, can I just catch this Trichogramma into my field to stop the heartworm?"

"Theoretically yes."

Li Zheng and Xiao Zheng were confused and did not understand Fu Yuanzhi's words.

Fu Yuanzhi said: "Trichogramma takes time to reproduce, and the effect will not be seen in a short period of time. If it is fast, it may be half a year, and if it is slow, it may be one or two years."

Fu Yuanzhi still said that the time would be longer, and estimated conservatively.

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