Control of High-yield Diseases of planted Peanut

1. Bacterial wilt of peanut

The disease mostly occurs from seedling stage to podding stage of peanuts. The incidence of the disease is serious in spring peanuts from May to June and summer peanuts from September to October. At first, the top leaves of the susceptible plants were soft and sagging, then the leaves of the whole plant wilted and drooped, but the withered leaves could still remain turquoise. By cutting open the stem, you could see that the transport tissue near the ground had turned brown, and at the incision was cut off by hand, the dirty white bacterial sap flowed out, and the roots of the diseased plants were rotten and dark brown. The control measures are as follows:

1. Rational rotation and reasonable rotation with non-parasitic crops, such as peanut and corn rotation, can eliminate germs in the soil.

two。 Select disease-resistant varieties such as "Baisha 1016 seed"

3. Improve the soil, pay attention to drainage, apply more rotten organic fertilizer, when sowing peanuts, applying plant ash 50kg ·kg ~ (- 1) 150kg ·min ~ (- 1) 20kg~30kg with 12% calcium, magnesium and phosphorus can promote the healthy growth of peanuts and improve the ability of disease resistance.

4. Chemical control

① can effectively control the occurrence of peanut bacterial wilt by dressing seeds with Lvxiang No.1 or fulvic acid when sowing peanuts. The method of application is that every kg seed is mixed with Luxiang No.1 1g~2g or fulvic acid 2g~3g, and the control effect can reach 80%.

② was sprayed with 1000 ~ 1500 times liquid of sand fungus king or pandijin in peanut seedling or disease stage, and the control effect was more than 90%. When the disease was serious, the root was irrigated with sand fungus king or pandijin 35g mixed with 15kg~20kg diluent, the effect was excellent.

2. Peanut leaf spot

Peanut leaf spot has two kinds of brown spot and black spot. During the growth of peanut, it generally occurs, and the mixture occurs on the same plant or even on the same leaf. The occurrence of brown spot is earlier and that of black spot is later. The control measures are as follows:

1. Strengthen the field management, remove the residual leaf disease plants in time after the previous crop harvest, in order to eliminate the infection source.

two。 Reasonable fertilization, increase the application of calcium, magnesium and potassium fertilizer, in order to improve the disease resistance of peanut.

3. Chemical control can control the spread of the disease, maintain a long period of green leaves, and prolong the time of photosynthesis:

① was sprayed 2 ~ 3 times with 1500 ~ 2000 times solution during the growing period with an interval of 15 ~ 20 days, and the control effect reached 93%.

In the seedling stage, ② was sprayed with 0.5g gold and water 15kg~20kg at the seedling stage for 3 ~ 4 times, with an interval of 15 ~ 20 days each time. The control effect was more than 95%. At the same time, it could control the occurrence of other diseases.

In addition, strong disease-resistant and yield-increasing agents "sand fungus king", "all-over gold" and "yellow leaf green" play a certain role in preventing the occurrence of peanut virus disease, and mixed spraying can enhance disease resistance when controlling diseases such as bacterial wilt and leaf spot. Increase the yield by more than 30%.