Plague Doctor

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March 3 is the annual National Tree Planting Day, and Mobei Senior High School in Mobei City also has corresponding plant activities.

On this big morning, the part of teachers and students who participated in the activity set off energetic and bustling.

There are vast wasteland and sandy land in Mobei. The work of planting trees for afforestation, sand prevention and control, and ecological protection are carried out all year round. Special attention is also paid to National Tree Planting Day. Therefore, there are more than 300 teachers and students in the first , High 2 students mainly, high 3 students only came a few student union cadre representatives.

“Students, planting trees is related to our future. Do n’t just plant trees on your mobile phone. You need to implement them in reality. Plant trees when you ’re free. You can plant one tree at a time. , The mountain is greener. “

The students stood on this remote wasteland away from the city, obediently and honestly listening to Cui Principal’s words.

Li Yuhao is also listening, the high 2 party, this is the second time he felt the fear of being dominated by Cui Principal on National Tree Planting Day. Cui Principal is not the one with a big belly and a nuisance, because he has a good temper and usually welcomes everyone.

After a long time, when everyone was drowsy this morning, Cui Principal finally said a few pages of manuscripts, and the Teachers took the students to work.

This wasteland is not a desert, there are some solitary weeds, but it is also becoming sparse. The position of the digging pit for planting trees has been marked in advance by the staff of the Forestry Bureau, and the saplings are also placed beside them.

“Student, planting a tree is a kind of hope, and planting a tree is a kind of happiness.” Cui Principal’s middle-aged face is very serious. While walking among the people, he said, “Planting a tree is a future! These students, What are you waiting for? Hands on! “

There was a chuckle around the people. It was Li Yuhao who was named by the Principal. They were not lazy, they hadn’t started yet.

“Cui Principal, don’t you think you haven’t finished speaking yet.” Li Yuhao’s pretense helplessly said, everyone laughed more.

Cui Principal could bear such a joke, and took a shovel to pass to the kid, “It’s finished! Just dig, it’s you.”

In the smiles of Wang Jiawei, He Ziyi and the others, Li Yuhao held this shovel as the motherland flower of New Generation. He was well nourished since he was a child. Although he was 2 tall, he had grown up tall and tall, and he was 1.8 metres tall. There are also playing basketball, so there is some strength to dig the ground.

When the shovel went down into the mud, Li Yuhao stepped on the head of the shovel to loosen the soil, so he shouted with excitement to dig up the mud.

It took a lot of effort, but it was not difficult!

“Okay, continue to dig.” Choi Principal nodded with satisfaction, walked away and continued to inspect other students.

Li Yuhao felt a bit wrong when the second shovel went down … something inexplicably uncomfortable in his heart, as if there was something in the mud …

The third shovel went down, and he saw from the mud puddle at his feet, “So, what is that … insect?”

“Hey?” Wang Jiawei also saw, eyes immediately stared, and the girl He Ziyi was screaming loudly.

They saw that the inside of the dug pit was full of densely packed insect egg-like things. They were all pale-yellow strips. They would not move, and they were full of mud.

“What’s wrong?” Class teacher Liang Teacher came over, and Cui Principal, who hadn’t gone far, also turned back. Upon seeing this, the two adults were frowning. This wasteland seemed to have a problem. Cui Principal said: “This seems to be the locust insect egg … Liang Teacher, quickly ask Luo Captain to come over and see them.”

Cui Principal is from Mobei. He used to do farm work and know a little bit, but Luo Captain is from the Forestry Bureau and is more professional.

“It’s a lot of stuff.” Cui Principal took the shovel and shoveled some mud out, all of which were insect eggs.

Several people looked at Li Yuhao, and more students came to watch.

Because of the effective governance, locust disasters are no longer visible in many places, but the ecological environment in Mobei is complicated. There are a certain amount of locust occurrences every year. News level.

Most of the students here have not been in contact with the farmland, and have never been in contact with the locust. At this time, they are disgusted to see these insect eggs.

“I have intensive phobia …” A girl with a disgusted murmur voice, though she was afraid, was still watching the excitement.

“What are you afraid of?” Choi Principal said ill-humoredly, “We used to dig it out as a kid and then grilled it and it smelled good.”

There was a sudden disgust, but Li Yuhao felt a little strange feeling, eat it? The throat swallowed …

At this time, Liang Teacher and Lin Captain quickly returned, and Cui Principal gave way.

“Cui Principal, this is indeed the locust insect egg.” Luo Captain recognized at a glance, “It should be the locust hairy.”

“En.” Cui Principal has checked some information with his mobile phone and took the opportunity to educate: “Student, the female locust’s egg laying device can stretch into the soil twice as long as its body, and can lay 2 eggs at a time. At that time, there can be a few 100 eggs per square meter, and each egg block counts 1000 eggs, and there are also a few 50 insect eggs per square meter, one square meter! Let them succeed in wintering, and it will be another 100000 2 months. Unearthed in summer, then the major event. “

How many 100000 locusts are hatched in one square meter? The students listened in surprise.

“The situation is not that serious.” Luo Captain’s plain and dark face smiled. “Not every insect egg can grow and hatch, and usually there are not so many insect eggs. This kind of hairy foot horned locust, our average density of insects in recent years In other words, the average number of adult insects is 30 per square, and there are many 100 per square. “

“Yes, yes.” Cui Principal was very modestly nodded. “Students, I heard that there are two things about locusts and locust plagues.”

“But if the locust occurrence area is too large and there is no control, the low insect population density will also cause locust disasters.” Luo Captain also said, as if talking to Choi Principal, let the students laugh, “The occurrence area of ​​our Mobei City Counting the farmland and the surrounding farmland, there are several 1000000 million mu each year. “

But this wasteland had no problems in the past few years. Luo Captain took a shovel and dug some holes in the surrounding land to check. Fortunately, there were no eggs.

It seems that Li Yuhao won the color with a spade. The insect eggs are concentrated in those ten square meters, and the area is very small. However, because of this situation, the tree planting activity was suspended first. Luo Captain and they needed to call the people from the Agricultural Bureau to do soil inspections and pesticides, etc. to do a good job of prevention and control.

“Luo Captain!” Li Yuhao chased up and asked a doubt in his heart: “How deep can the insect egg hide in the soil?”

“It’s very shallow, less than half a meter.” Luo Captain said, being very kind to good students.

“Oh …” Li Yuhao listened, but still had a weird feeling. The more he looked at the mud blocks from which the insect egg was dug, the more so.

Looking around, a barren land … Could there be a deeper location?

The feeling of longing is even stronger, which makes Li Yuhao swallowed saliva and said again.