I. Cabbage Downy Mildew: It is expected to be Grade 2 and Grade 3 in some areas, and it can reach 5 in some areas.
According to the survey, the rate of downy mildew disease in cabbage in most regions is generally below 10%, which is relatively low compared to the normal years. Surveys in Guangrao, Weinan, Laizhou, Binzhou, Laiyang and other places were conducted at the end of August and early September, and the diseased plant rate was 0.4%. , 1.0%, 2.0%, 3%, 6.7%. However, investigations in some regions have found that the incidence of some seedbeds is very high. The investigations in Feicheng and Zoucheng were 35.2% and 70% respectively. From September 7th to September 9th, the rate of downy mildew disease in cabbages showed a steady upward trend, and the diseased planting rate was still below 10% in most areas. The surveys in Weinan, Dongping, Jining were conducted, and the diseased plant rate was 3-5% respectively. 7.5%, 5-7%.
According to the forecast of the Provincial Meteorological Observatory, in September, precipitation in southwestern Shandong was slightly less than normal, and slightly higher in other regions than in the normal years. Overall, there was no adverse impact on cabbage downy mildew. It is expected that the appropriate period of control will be in mid-late September.
Second, vegetable soup: It is expected that there will be two grades and three grades in some areas.
Since late August, precipitation in most parts of our province has been relatively high, the number of hours of sunshine is low, and the temperature is low, which has a certain inhibitory effect on the incidence of rapeseed. According to the survey, the amount of wolfberry in most areas is lower than the average of the calendar year, The amount of maggots is generally dozens of heads or less. Surveys in Chengwu, Laizhou, Feicheng, Guangrao, Laiyang, Cangshan, etc. were carried out in late August. The number of maggots per plant was 21, 5, 25, 26, and 36 respectively. 8 heads.
In September, precipitation in most parts of the province was slightly higher, and the temperature was higher. Overall, there was no obvious adverse impact on the breeding damage of aphids. It is expected that the appropriate period of prevention will be the mid-to-late September period.
Third, Chinese cabbage soft rot disease: It is expected that it will be grade 2.
At present, cabbage is in the early stage of growth. According to surveys, cabbage rot has not occurred in most parts of the province. In September and October, the precipitation in most areas of our province was slightly more, and it was beneficial to the damage.
Fourth, other pests
1. Plutella xylostella: It is expected that it will have level 2 and local level 3.
2. Pieris rapae: Expected to be level 2.
3. Cabbage virus disease: Level 1, Level 2
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