Bordeaux Spray Notes:
(1) Bordeaux fluid itself is a strong alkaline pesticide, and some of the alkali chemicals such as oxygen dimethoate, isocarbophos, dichlorvos, marathon, safrole, quinoline, Daofeng powder, enemy killed, dicofol, etc. Ketide, chlorothalonil, carbendazim, thiophanate, dexanam, dexammonium, mancozeb, trehaloxacin, thiram, etc. The vast majority of insecticidal fungicides (and more), Anti-Drop, 2,4-D, Gibberellin (90%), PP333 (Paclobutrazol), GS-802, CCC, ethephon and other plant growth regulators and boron fertilizer, dihydrogen phosphate If the interval is too short when the potassium fertilizer and other leaf fertilizers are mixed or used interchangeably, they will react and reduce the efficacy or complete failure. It is best to use it alone for production. Do not mix it with other drugs. Residual effect of Bordeaux fluid is generally 15-20 days, the longest up to 1 month, fruit Bordeaux sprayed on the Bordeaux mixture, the general interval of 2 to 3 weeks before spraying lime sulfur mixture, Futu special, pine fat mixture, Oil emulsions, etc.
(2) Do not use it continuously for a long period of time. Frequent use of Bordeaux mixture will exacerbate the serious occurrence of mites and scale insects such as red spider and rust mite. The prevention and treatment of diseases should be used when the number of larvae is low, and the inspection and control of pests should be strengthened after spraying. If the locust base is larger, it is better not to use Bordeaux mixture instead of non-copper preparations. Or, it can be used alternately with non-copper preparations such as Baume 0.2-0.4 degree lime sulfur to prevent inducing pests.
(3) Rescue of copper ion injury. Improper use of Bordeaux fluid causes copper ion injury (blackening and drying from the tips of the leaves, necrosis or perforation of the leaves, rust, pimples, or dark spots on the fruit). If it is found early, spray the crown immediately. 5% to 1% of lime aqueous solution, after every 10 to 15 days, spray once 0.3% urea + 0.2% potassium dihydrogen phosphate, can reduce the damage of injury.
(4) Combining urea-based neutral fertilizer with top dressing fertilizer (urea) and mixed spraying cloth with Bordeaux mixture (with accompanying use) will not affect fertilizer efficiency and efficacy; on the contrary, it can promote leaf greening and improve disease prevention effect. . Urea concentration: 0.3% to 04% in spring, 0.2% to 0.3% in summer and autumn, and 0.4% to 0.5% in winter.
(1) Bordeaux fluid itself is a strong alkaline pesticide, and some of the alkali chemicals such as oxygen dimethoate, isocarbophos, dichlorvos, marathon, safrole, quinoline, Daofeng powder, enemy killed, dicofol, etc. Ketide, chlorothalonil, carbendazim, thiophanate, dexanam, dexammonium, mancozeb, trehaloxacin, thiram, etc. The vast majority of insecticidal fungicides (and more), Anti-Drop, 2,4-D, Gibberellin (90%), PP333 (Paclobutrazol), GS-802, CCC, ethephon and other plant growth regulators and boron fertilizer, dihydrogen phosphate If the interval is too short when the potassium fertilizer and other leaf fertilizers are mixed or used interchangeably, they will react and reduce the efficacy or complete failure. It is best to use it alone for production. Do not mix it with other drugs. Residual effect of Bordeaux fluid is generally 15-20 days, the longest up to 1 month, fruit Bordeaux sprayed on the Bordeaux mixture, the general interval of 2 to 3 weeks before spraying lime sulfur mixture, Futu special, pine fat mixture, Oil emulsions, etc.
(2) Do not use it continuously for a long period of time. Frequent use of Bordeaux mixture will exacerbate the serious occurrence of mites and scale insects such as red spider and rust mite. The prevention and treatment of diseases should be used when the number of larvae is low, and the inspection and control of pests should be strengthened after spraying. If the locust base is larger, it is better not to use Bordeaux mixture instead of non-copper preparations. Or, it can be used alternately with non-copper preparations such as Baume 0.2-0.4 degree lime sulfur to prevent inducing pests.
(3) Rescue of copper ion injury. Improper use of Bordeaux fluid causes copper ion injury (blackening and drying from the tips of the leaves, necrosis or perforation of the leaves, rust, pimples, or dark spots on the fruit). If it is found early, spray the crown immediately. 5% to 1% of lime aqueous solution, after every 10 to 15 days, spray once 0.3% urea + 0.2% potassium dihydrogen phosphate, can reduce the damage of injury.
(4) Combining urea-based neutral fertilizer with top dressing fertilizer (urea) and mixed spraying cloth with Bordeaux mixture (with accompanying use) will not affect fertilizer efficiency and efficacy; on the contrary, it can promote leaf greening and improve disease prevention effect. . Urea concentration: 0.3% to 04% in spring, 0.2% to 0.3% in summer and autumn, and 0.4% to 0.5% in winter.