(One bucket = ten liters, one liter = ten he, one liter ≈ 3 catties (refer to Han Dynasty conversion))

Method 1: Mulberry leaves, add 50 lily with water, rub them after boiling, and add four times the water to the filtered original solution.

Method 2: Neem root water, soak the roots of the neem tree in about three buckets of water in advance, soak for four days, rub and mix several times during the soaking period, and then put it together in the pot to boil for about three quarters of an hour, and the water liquid is yellow-brown to become the mother liquor.

Both of the above are used to control spider mites.

In addition to the prevention and control of red spiders, with Song Yi's unremitting efforts, he discovered that autumn peony can control heart-digging insects.

Chop the autumn peony into a pot, add five times water, boil it to become the mother liquor, add water fifteen times and spray.

Fu Yuanzhi received the letter sent back by Song Yi and smiled.

Fu Yuanzhi continued to walk to the position of the experimental table.

In order to facilitate the comparison, he specially borrowed two tables from Li Zheng.

Two tables, one with only a few wooden boxes, and the other on the contrary, crowded!

There are few people from the Zheng family, and many people from other people's families.

Under the observation during this time, he probably knew the natural enemies of the heart-digging worm.

The cocoon under the belly of the caterpillar that was first discovered was indeed not its own offspring, and what hatched was another yellow worm with wings and spikes on the abdomen, like a type of bee.

Fu Yuanzhi temporarily called him a red-eyed bee, as the name suggests, a red-eyed bee.

Now, some of the heart-digging insects in other people's fields are gradually looking like the caterpillars he found from Niu Wa before, and they are protecting the cocoons under their abdomen as guardians.

However, the process of change is also very suffocating.

Red-eyed bees parasitize their eggs on the bodies of heart-digging insects, which eat round and slippery at first, but their physical condition is getting worse day by day.

As the red-eyed bee larvae in its body gradually grow, it is visible to the naked eye that the heart-digging worm gradually loses its ability to move.

One day, when Fu Yuanzhi was observing, he found that an extremely inconspicuous exchange bulge was appearing on the stomach of a heart-digging worm, at first glance it looked like a heart-digging worm was wriggling, but if you looked closely, you could see that something was wrong with it, as if something was struggling in the stomach of the heart-digging worm, just like a seedling that was about to break out of the ground.

With each bulging, you will feel that the skin of the heart-digging worm is thinner again, and when the skin is close to transparency, that is, the moment when the contents come out.

The white larvae were like maggots.

They didn't burrow out of their entire body, leaving about a fifth of the body stuck in the heart-digging worm, one by one.

If it weren't for Fu Yuanzhi not leaving, he would have thought that the heart-digging worm had given birth to dense little cubs.

The wriggling little larvae poured out of the heart-digging worm's body, and they wriggled around the heart-digging worm.

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 body of the heart-digging worms, and the first thing they did when they came out was to spin silk, presumably the small white cocoons they saw before were a layer of protection they put on themselves.

At this time, the heart-digging worm did not have that fat appearance.

Its body shrank rapidly as the larvae were born, directly shortening by a third of its length, and its body was like a deflated ball, with knots of "wrinkles".

With its last breath remaining, it will give another layer of protection to the small cocoons after the heart-digging worm has formed a cocoon, that is, to reinforce the cocoon with a layer of silk, and then it will guard the cocoon under it day and night without eating or drinking.

Even if other small insects approach, it will drive them away, and when the larvae break out of the cocoon, the heart-digging insects will also run out of oil, and the red-eyed bee can be said to squeeze the use value of the heart-digging insects to the fullest.

When Fu Yuanzhi recorded the process in the book, he also wrote in small print next to it: The red-eyed bee reproduces by parasiting in the body of the heart-digging bee, and the heart-digging worm is when it dies when the red-eyed bee grows up, and the heart-digging worm treats the red-eyed bee larvae like its own child, and the whole action is like a mother's love for her children and like a puppet without thoughts.

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

Now, the natural enemy of the heart-digging worm can probably be concluded to be a red-eyed bee.

However, it is questionable whether the red-eyed bee will survive the journey to the capital with him.

The transportation of southern bees to the north is not the transfer of grain from the south to the north.

The grain is picked and shipped directly, but this red-eyed bee is different, it is alive, and it can't be allowed to die.

Also, in the process of capture, it must not be injured, otherwise the probability of survival is even smaller.

In fact, you can also consider catching all of these heart-digging insects and transporting them, but not all heart-digging insects have red-eyed bees in their bodies.

Fu Yuanzhi thought of the situation of Xiao Zheng's family, since he had a lot of heart-digging insects in the field, he would catch a certain number of red-eyed bees and put them into the field of Xiao Zheng's family.

However, it is already the harvest season, and everyone does not start planting until May this year due to the weather, and now it is also the harvest season, so I don't know if he will continue to plant the second season.

Of course, most of the families in the village were already planting the second crop of catawheat 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 red-eyed bee is caught immediately, the effect may have to wait until the end of the year, or next year to see, it will take too long.

Fu Yuanzhi was thinking about the situation in the capital, and he came to find a solution a year ago, and his fingers tapped on the table one after another.

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

The situation in the capital is urgent, although Song Yi has found a way to temporarily suppress the red spider and the heart-digging worm, but the symptoms are not the root cause, and only the red-eyed bee can fundamentally eliminate the heart-digging worm.

Fu Yuanzhi asked Li to call Xiao Zheng to the house.

Xiao Zheng Heli was looking at the two tables and looking over.

Xiao Zheng has a straightforward temperament, and because he has no money and no food, his temper is even more irritable, if it weren't for Fu Yuanzhi is official, he would have wanted to lose his temper so that the other party has something to say directly, and he was panicked in his heart when he sold it here.

Li Zheng saw something from this, he pointed to the wooden box on the table of the other people in the village, and said, "Master Fu, this is the reason why there are not many heart-digging worms in everyone, right?" ”

Fu Yuanzhi nodded.

Xiao Zheng listened to the words and looked at it carefully, but he still didn't see anything famous.

Fu Yuanzhi explained: "Xiao Zheng's land is remote, and the heart-digging insects of other families in the village are enough for red-eyed bees to breed, so they have not reached Xiao Zheng's land. ”

Rizheng said: "Red-eyed bee? ”

Fu Yuanzhi nodded: "I gave it for the time being, its eyes are red, it has tail pins, so I will temporarily call it this name." ”

Li Zheng and Xiao Zheng glanced at each other, and Xiao Zheng said, "My lord, then can I stop the heart-digging worm by catching this red-eyed bee into my field?" ”

"Theoretically."

Li Zheng and Xiao Zheng were confused, and they didn't understand Fu Yuanzhi's words.

Fu Yuanzhi said: "It takes time for red-eyed bees to reproduce, and it is impossible to see the results 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 was long, and it was conservatively estimated.

Thank you comrades who voted~

Thank you for the monthly ticket voted by the daughter of the book-chasing fairy~

(End of chapter)