Chemical hybriding agent of Brassica. Rapa and application method thereof

Abstract

The invention belongs to crop genetic breeding and relates a chemical hybriding agent of Brassica. Rapa in north cold regions and an application method of the chemical hybriding agent. The application method of the chemical hybriding agent of Brassica. Rapa comprises the following steps of (1) spraying medicaments with a spraying concentration of 0.6mg / L-0.8mg / L for the first time in a squaring stage, namely flower buds is occurred on 50% of plants; spraying medicaments with a spraying concentration of 0.7mg / L-1.0mg / L for the second time after 10-12 days; spraying the medicaments at 9:00-11:00 in the morning without wind and dew, guaranteeing that it does not rain within 12 hours after spraying the medicaments to guarantee pesticide effects, or adding 1.2-1.5mg / L of agglutinant and guaranteeing that it does not rain within 1 hour to guarantee pesticide effects; and (2) enabling a single-plant medicament accepting amount to be 9-10ml after spraying the medicaments for the first time; enabling the single-plant medicament accepting amount to be 15-16ml after spraying the medicaments for the second time, wherein phytotoxicity phenomena occurs no matter which plant development stage the treatment is carried out in when the single-plant medicament accepting amount exceeds 20ml. The chemical hybriding agent can induce 96%-100% of plants to generate abortion phenomena. The chemical hybriding agent is low in cost and simple and practical in preparation and spraying method.

Description

technical field [0001] The invention belongs to the category of crop genetics and breeding, and relates to a chemical andricide suitable for Chinese cabbage-type winter rape in northern cold regions and an application method thereof. Background technique [0002] Brassica napus belongs to the Brassicaceae crop, which is resistant to barrenness and cold, especially has the outstanding characteristics of late sowing resistance and short growth period. Cabbage-type winter rapeseed has better cold resistance than any other type of winter rapeseed, and has developed rapidly in the northern cold region, and has become the main ecological crop, winter cover plant and oil crop in the northern region. [0003] Rapeseed has obvious heterosis, and there are many types of hybrids. my country has started the research on rapeseed hybrids since the 1960s. It is the first country in the world to breed hybrid rapeseed and popularize it on a large scale. The utilization of heterosis is at th...

AI Technical Summary

Problems solved by technology

But the price is expensive and the practical application value is low; Inorganic salt drugs: sodium chloride and MG5

The male-killing rate is as high as 82.6%, but when the concentration is high, it will burn the plant tissue; KMS-1, triacontanol, L.S-1, etc., the male sterility induction rate of rapeseed is lower than about 80%, but the chemical killing hybrid system The species is not ideal, the risk is high, and there are still great difficulties in popularization and application (Wang Qiuye, Guo Zhiyuan. Shaanxi Agricultural Science. 1984(2):15-17)

Images