In 2015, the Spring Festival in February had just passed.

The Lingnan region has entered spring ploughing one after another, especially in Qiongzhou, which has a tropical climate, when rice has been planted for a month.

The Agricultural Research Institute of the Academy of Sciences has a special tropical botanical research institute here in Qiongzhou.

Wearing a straw hat and dressed as an old peasant, Yuan Lao was checking the rice heading situation on a large experimental field.

However, looking at the situation of this large rice field, he frowned and turned his head: "Xiao Wang, the rice planting in Qiongzhou is January 15th ~ 20th!" ”

Assistant Xiao Wang nodded: "This is the time." ”

Several other researchers also noticed that something was wrong, and according to the general situation, about a month after the rice was planted, it would begin to enter the heading stage.

The rice in Qiongzhou was planted on January 15th ~ 20th, and now the time has come to February 29th, but this large rice field has not entered the heading period.

"Could it be the weather this year?" One of the researchers said.

Yuan Lao shook his head: "Even if the weather is lower than last year, it will not have much impact on Qiongzhou, there must be some other reason." ”

Immediately, everyone sampled the experimental field and brought it to the research institute for laboratory analysis.

While paying attention to the situation of the laboratory analysis, Yuan Lao instructed the staff to pay attention to the situation in various parts of Qiongzhou.

Laboratory of the Qiongzhou Agricultural Research Institute.

Researchers are conducting comprehensive laboratory analysis of hundreds of samples.

Through a high-precision microscope, Hu Guangyi found that some fungal communities were attached to the straw tissues of rice.

The fungal community presents, the conidia are not branched, 3-5 clusters, protruding from the host epidermis or stomata, 80-160×4-6 μm in size, with 2-8 septums, slightly enlarged at the base, light brown, pale upward color, curved at the apex, and conidia at the top.

The conidia are colorless, pear-shaped or club-shaped, often with 1-3 septums, 14-40×6-14 μm in size, and foot cells at the base.

Judging from the morphology, it should be a typical Pyricularia oryzae Cav.

Rice spora can cause rice blast, also known as rice fever, commonly known as fire blast, hanging head blast, neck blast, etc., is an important rice disease in the world, rice blast is the world's most widespread and common rice fungal disease.

Under natural conditions, blast fungus infects only rice and is an epidemic that spreads through air currents.

Hu Guangyi thought strangely, it stands to reason that the disease resistance of the new varieties in the experimental field in Qiongzhou is quite good, and with the use of preventive pesticides, how could so many colonies be found in the straw tissue?

"Li Can, what is the level of Rice Pear in your sample?"

"Broadly speaking, do you have a lot of rice spora in your sample?" Li Can turned his head and asked.

Hu Guangyi nodded and replied: "The rice pear fungus in my group of 12 samples is very serious, and according to the prevention and control standards of our experimental field, it is impossible to have such a serious rice pear strain outbreak." ”

Then the results of the other eight groups of laboratory analysis also came out, and Hu Guangyi and Li Can took the test sheets, and their brows immediately furrowed.

They tested a total of four new varieties in their experimental field this year, but all four varieties were spared, and all of them were infected with dense rice spora bacteria.

"Li Can, you take someone to conduct in-depth research on these rice pear mushrooms, and I will report to Director Yuan."

"Okay."

Looking at Hu Guangyi's hurried back, Li Can hurriedly turned around and ordered: "Prepare for genetic testing." ”

He suspected that there was a mutated variety of rice pear spora fungus, and the rapid genetic testing was carried out non-stop, looking at the results of the test sheets, Li Can's heart sank.

Rice spora can be divided into 7 groups and 128 physiological races. However, according to the results shown in the test sheet, these rice spores are not one of the 7 groups and 128 physiological races.

That is, this is a variant variety.

"Try the compound fungicide of Repis and Jiashu rice."

"Okay."

Half an hour later, the effect of Rebisi and Jiashui rice is not obvious, you must know that this compound fungicide for the previous rice pear spora fungus, its control effect is generally more than 95%, is the current preferred agent for the prevention and control of rice blast.

Li Can's heart became more and more low, and he hurriedly ordered: "Try other fungicides." ”

"Preparing."

The effect of prothiamidinezole solution is not obvious.

The combined fungicide of carbendazim and sulfur obtains about 40~60% of the killing effect, but after the second generation of Bacillus oryzam mutant, the killing effect begins to become insignificant.

The compound fungicide of tricyclazole and sulfur also has a certain killing effect on the first generation, but since the second generation, the effect has plummeted.

Even if several fungicides are used alternately, the mutant rice pear will develop drug resistance after three or four generations.

Yuan Lao, who had just arrived, looked at the test reports and Li Can's disinfection experiment, and knew the seriousness of the matter.

He has been in contact with agricultural technology stations all over Qiongzhou, and the problem is not only the experimental field of the research institute, but the situation is common throughout Qiongzhou.

"Generalized, Li Can."

"Director."

"You test all the fungicides on the market to see if there is one fungicide that can suppress the outbreak of rice blast." Yuan Lao commanded solemnly.

"No problem."

Yuan Lao came to his office, opened the login program of Nanke's Dream Realm, and then quickly put on his brainwave glasses.

Nanke Dream Realm - City of Truth.

Inside the Agricultural Research Institute.

He immediately summoned everyone from the Agricultural Research Institute and reported the matter to Huang Mingzhe.

……

At this time, Huang Mingzhe, who was at the Phoenix Project Research Base, immediately received a reminder from the ghost.

After taking out his mobile phone, he found that it was Yuan Lao's urgent report, and after browsing it at a glance and ten lines, Huang Mingzhe had already guessed the reason in his heart.

He immediately found an office, directly landed in Nanke's dream realm through brainwave glasses, and came to the Agricultural Research Institute in Truth City.

At this time, there was already a lot of noise in the Agricultural Research Institute, and it was obvious that everyone was aware of the seriousness of the matter.

You must know that rice accounts for a very important proportion of China's grain, China's annual grain output is about 610 million tons, and the annual output of rice is about 200 million tons, this proportion has reached 30%.

In addition, the current domestic grain self-sufficiency rate is between 80~85%, and once the rice harvest is completely lost, the domestic grain self-sufficiency rate will drop to between 50~60%.

Even if there is a reserve of grain, this gap is very terrible.

While listening to the discussion of agricultural experts, Huang Mingzhe asked the ghost to investigate the situation of rice across the country, and now the rice in the north and northeast has not been planted, mainly in the south and southwest.

Sure enough, after an investigation, there were different degrees of rice blast in various places.

Suddenly, he shifted his gaze to Southeast Asia and the Tianzhu region, and asked the ghost to investigate the situation in these regions as well.

As a tropical region, rice was planted earlier than most parts of the country, similar to Qiongzhou, and if these areas were also infected with rice blast, it is estimated that they have entered a major outbreak stage.

Sure enough, as the information was picked up by the ghost, the rice in the entire Southeast Asia and Tianzhu region suffered from very serious rice blast.

Huang Mingzhe reported the situation to Yuan Lao and other experts, and their brows furrowed, the scale of this infection was really terrifying.

Once Southeast Asia and Tianzhu, these grain-exporting countries are seriously affected, coupled with the current international grain prices, the whole of Asia will have problems, and they will be very serious problems.

However, the super drug resistance of Bacillus oryzae mutant made a group of experts helpless for a while.