Causes and Control Methods of Peanut Witches' Broom Disease
What causes peanut witches' broom disease? How to prevent and control it? (1) Disease pattern: Peanut witches' broom disease may be caused by a mycoplasma-like organism or a complex infection of mycoplasma-like organisms and viruses. Neither seeds nor soil transmit the disease, but grafting can transmit it. Whether other insects and sap can transmit the virus is still under study. The occurrence of peanut witches' broom disease...
What causes peanut witches' broom disease? How to prevent and control it?
(1) Disease pattern: Peanut witches' broom disease may be caused by a mycoplasma-like organism or a complex infection of mycoplasma-like organisms and viruses. Neither seeds nor soil transmit the disease, but grafting can transmit it. Whether other insects and sap can transmit the virus is still under study. The occurrence of peanut witches' broom disease is related to farming and cultivation practices. Generally, the disease is severe on thin sandy soil and mild on clay soil; severe on dry land and mild on irrigated land; mild when seed quality is good and severe when it is poor; mild when peanut growth is vigorous and severe when it is poor; severe in continuous cropping fields and mild in rotated fields. The disease occurs more severely in dry years, and more severely after a long drought followed by rain. Prostrate varieties suffer more severely than upright varieties. The disease is severe in years when leafhoppers break out.
(2) Control measures: 1. Sow at the appropriate time. 2. Strengthen fertilizer and water management to promote vigorous peanut growth and improve disease resistance and tolerance. Promptly remove suspicious diseased plants and weed hosts from the field. 3. Remove diseased plants from the field promptly and early. Before peanuts flower, spray to control leafhoppers and other virus-transmitting vectors.