How to avoid injury occurred flowers

Although you can control the use of chemical pesticides flower pests, but improper use can easily cause flower injury, injury can generally be divided into acute injury and chronic injury. The main symptoms of leaf spots appear uniform , leaf edges curl scorch , plant growth is slow , serious and even lead to death. So be sure to strictly control the use of pesticides concentrations and doses , as found using standard doses and concentrations of pesticides can not achieve the desired results , you should replace pesticides . Not at liberty to mix pesticides in order to avoid injury.

First, the random mix pesticides : When flowers diseases, pests occur simultaneously, people usually will insecticide, fungicide mix , took two of three insecticides , and some even joined the foliage . If the same performance between several pesticides , pH value close to the chemical reaction does not occur , there is no effect on the efficacy , otherwise it will affect the efficacy of play , but also produce injury. Such as Bordeaux mixture is to use copper sulfate , lime and water prepared from suspensions, which can control a variety of fungal diseases which have an alkaline liquid , which are not commonly used pesticides , nor with lime sulfur , turpentine agent mix , otherwise it will reduce the efficacy , resulting in injury. Therefore pesticides , we must first understand their pharmacological properties , can mix the mix , then you must not mix the used alone .

Second, the spraying time , inappropriate methods : water power sprayer spraying cycle is too short in the different stages of pests and diseases , pesticide spraying the cycle length is different, generally in early stage two weeks time, the peak once a week. In fact, many difficult to kill pests , bacteria difficult to eradicate , and some growers to frequent drug use , some three days with a single , or even one day be used once , the results did not kill insects , disease did not eradicate , flowers, seedlings , it was an injury. In this case, we must strictly control the spraying cycle , otherwise injury also intractable than the pest . Should pay attention to the prevention and control of pesticides used alternately to prevent resistance to pests and pathogens , causing frequent spraying , eventually leading to injury ; Some florists in spraying pesticides , no spray to the key parts of the drug , sometimes in a a part of the residence time is too long, so a lot of syrup stranded in the leaf surface , causing injury flowers , old leaves and large this phenomenon is particularly evident on the leaves .

Third, the dispensing process is not standardized : chemical formulations are many, wettable powder, emulsion , tablets , granules , solutions, etc. , some of them can be dissolved directly forms , some can not completely dissolved. Undissolved particles suspended in solution, easy to clog the nozzles when garden pressure sprayer spraying , even smaller particles ejected from the nozzle , also remain in the leaf surface , resulting in localized plant phytotoxicity . Therefore, in dispensing , pay attention to strict accordance with procedures , different formulations of pesticides first dissolved in a small container and then transferred to a large container until completely dissolved or melted evenly and then transferred to the sprayer .