Announcement on the Examination and Approval of Corn Varieties Approved by the State in 2022 (Corn Varieties Approved by the State in 2022)

On the last day of 20021,the state issued a notice of examination and approval, and 9 19 maize varieties, such as 18 12, passed the examination and approval, providing a basis for maize selection in 2022. Among them, growers are most concerned about the resistance of maize varieties to stem rot. There are few varieties that are really resistant to stem rot, but they have greatly promoted agricultural production.

Announcement of National Maize Variety Approval in 2022

677 rice varieties such as Longjingyou 4456, 9 12 and 9 19 corn varieties, 39 cotton varieties such as Xinshi K35, and 86 soybean varieties such as Jiuyan No.8 have passed the eighth meeting of the Fourth National Crop Variety Approval Committee.

This is the last batch of corn varieties approved according to the old standards before the implementation of the new seed law and the new method of corn variety approval.

Some or quite a few of these approved seeds are "lucky". They are called lucky because they can't pass the examination and approval according to the examination and approval method of new corn varieties and are doomed to be "brushed".

Even among the lucky ones, we have statistics:

Among the 192 varieties approved by Huanghuaihai this time, only 20 varieties are highly resistant to stem rot, accounting for 10.4%.

There are 38 varieties resistant to stem rot, accounting for 19.8%. The proportion of moderate resistance and high sensitivity was 69.8%. In other words: nearly 70% are not resistant to stem rot. 10, or 1 20 varieties, or even 1 25 varieties are really highly resistant to stem rot.

The national experiment emphasizes the stem rot of maize.

Corn wilt is the biggest culprit. Corn is easy to break in the middle and late stages, and he is also an accomplice or even the culprit.

The key is that it is difficult to prevent and cure, and the general prevention and control means are difficult to work. Because its incidence is basically in the late growth stage of corn, and it is at the base or middle and lower part of corn stalk, it is difficult to fly control and manually apply pesticides.

Therefore, the reduction or non-occurrence of manual intervention can be basically ignored. It is also one of the factors that make it difficult to harvest corn seeds mechanically.

Because the most important factor of mechanical harvesting of corn is "strong stalk", that is, after the corn is ripe and before harvesting (the water content of corn grain drops below 18%), the corn must be "upright stalk".