What are the main local diseases and insect pests of licorice? How to prevent and cure?
(1) at the initial stage of the onset of rust, the rust can be sprayed with 1000 times of 25% powder or 97% of chlorphenamine, once every 7-10 days, for a total of 2-3 times.
(2) spraying Bordeaux liquid at 1:1 before the onset of brown spot; at the initial stage of the disease, spray control with 2000 times of methyl thiophanate wettable powder or 75% chlorothalonil, once every 7-10 days for a total of 2 times.
(3) the aphids were sprayed with 1500 times of 40% dimethoate EC.
(4) the serious damage period is from late June to early August. During the occurrence period, 2.5% enemy killing emulsion was used 2000 times to 4000 times, 45 kg per mu. In order to meet the quality standard of pollution-free medicinal materials, it is forbidden to spray toxic pesticides or other chemicals within 40-60 days before licorice harvest to prevent pesticides or toxic heavy metals from exceeding the standard. In addition, licorice powdery mildew and licorice seed wasps should also be controlled in time.
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Pest control of licorice: leaf beetle pest control
The main species of leaf beetles harmful to licorice are Diorhabdatarsalis, Pynrrhaltaaenescens, Monoleptaquadrigutdata, Diorhabdarybakowi, Ceytrasp., Colasposomadauricum and Coptoc.
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Control of diseases and insect pests of licorice
(1) Rust: the disease occurred from May to June, causing damage to leaves. Prevention and treatment methods: ① concentrated burning of diseased branches; at the initial stage of the onset of ②, 90% diazepam sodium was sprayed 400 times. (2) Brown spot disease occurred from May to June, causing damage to leaves. Prevention and treatment methods: ① concentrated burning of diseased branches; at the initial stage of the onset of ②, spray 1: 1 100: 160 Bordeaux solution or 70% methyl topiramate wettable powder 1500-2000 times. (3) powdery mildew occurred from May to June, causing damage to leaves. Prevention and control method: spray 0.2-0.3 Baume stone sulfur
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