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How to prevent and control peanut bacterial wilt and stem rot? Detailed explanation of technical key points
I. Peanut bacterial wilt 1. Symptoms. Peanut bacterial wilt mostly begins to develop around flowering, but the disease is most severe during the peak flowering and pegging stage, and the condition eases somewhat after pod setting. Its most notable symptom is: the aboveground leaves of diseased plants wilt rapidly, the vascular bundles of the underground roots turn brown, and along the root-stem section, when moist, squeezing the cut surface can exude...
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How to prevent and control waterlogging damage in peanuts? Detailed explanation of key technical points
Peanut waterlogging damage occurs for two reasons: first, low-lying terrain, heavy clay soil, and poor drainage; second, during seasons with long rainfall periods or excessive rainfall, surface water and groundwater are in excess and cannot be drained away in time. From the perspective of the water requirements for peanut growth and development, the suitable soil relative humidity at the seedling stage of peanuts is 50%-60%. When the soil relative humidity is higher than 70% or there is standing water...
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What are the control methods for peanut root rot?
There are broadly two causes of peanut root rot: one is waterlogging, and the other is root rot disease. Control should begin with draining away the standing water and keeping the ditches clear. Before sowing peanuts, treat the seed with a 10% Shileshi seed coating, and after the disease appears, drench the roots with a 1000-fold dilution of Lüheng No. 1 or No. 2; foliar spraying is ineffective. Practise crop rotation: in lightly affected fields, rotate every other year, and in severely affected fields, rotate for 3 to 5 years. Deep ploughing to improve the soil, applying more organic fertiliser, and rational irrigation and drainage will strengthen disease resistance.
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How to prevent and control peanut bacterial wilt? The flowering and pegging stage is key
Peanut bacterial wilt is a devastating disease. Once infected, the whole plant wilts and dies, and it cannot be cured. The flowering and pegging stage of peanuts is the period when bacterial wilt breaks out, and during this time attention should be paid to spraying for control. Specific control method: when peanuts begin to bud, spray the leaves once every 10 to 15 days with a 1500-fold 70% hymexazol water-soluble...
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Detailed Explanation of the Occurrence and Control Techniques of Peanut Stem Rot
In recent years, the peanut planting area in our region has increased year by year, and peanut diseases have also risen accordingly, especially peanut stem rot, whose damage has increased relatively rapidly. According to survey statistics, from 2001 to 2003, fields affected by this disease accounted for 89.6%, with mild diseased plant rates of 10-20%, and severe cases reaching over 60%, or even dying in patches with total crop failure....
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Prevent early defoliation in peanuts and take timely control measures
Peanut net blotch diseased leaves. Early defoliation in the late stage of peanut growth can seriously affect peanut yield. The main causes of early defoliation in the late stage are premature senescence of the plants and damage from leaf spot diseases (net blotch, brown spot, etc.). Peanuts sprayed with paclobutrazol and regulators containing this ingredient shed leaves earlier and more severely. Therefore, preventing early...
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Why do the lower leaves of peanuts have spots while the upper leaves are curled?
The preliminary diagnosis is leaf spot disease with a mixed occurrence of scab. It is recommended to spray the foliage with carbendazim, thiophanate-methyl, Aimiao, Score (difenoconazole), Daconil, Amistar, etc. It is best to select two chemicals and use them alternately, applying once every 5-7 days for 2-3 consecutive applications. At the same time, spray the foliage with potassium dihydrogen phosphate.
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Using chlorpyrifos for peanut seed dressing can effectively control insect pests
Peanut seed dressing without insect damage - chlorpyrifos peanut seed dressing without insect damage is a non-toxic, residue-free biological insecticide that mainly acts on the nervous system of soil-dwelling pests, causing metabolic disorders so they stop feeding and die; it is especially sensitive to larvae. With one seed dressing, it remains active in the soil for more than 130 days and can effectively...
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What are the comprehensive control measures for peanut southern blight?
Peanut southern blight is a soil-borne fungal disease that occurs from the pod swelling stage to the maturity stage of peanuts. After the peanut roots, pods and stem bases are infected, they initially show brown soft rot, with white silky mycelium at the root-stem area above ground (hence the name southern blight), along with rapeseed-like sclerotia; the stems and leaves turn yellow and gradually die, and the peanut pods...
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