As a result of improper use of pesticides crop phytotoxicity , our country has an impact on crop yield and quality and safety of agricultural products of major risks.
Improper use of pesticides why the injury occurred
Synthetic pesticides used insecticide and disease prevention, to kill weeds , because of its affinity with the crop itself is not , it will affect crop metabolism, reduce crop immune function . Therefore, the improper use of pesticides causes crops difficult to find the hidden tag of injury or injury , will inhibit crop growth , leading to malnutrition.
To sum up, there are four issues that affect the rational use of pesticides , one pharmaceutical quality , the second is the use of technology , three are standard spraying machine , garden pressure sprayer spraying machine 4 is to regulate the use of technology . In addition, the natural environmental conditions such as low temperature , high temperature and drought , salinity and other effects , can lead to injury incurred or aggravated injury.
Types of injury
Pesticide phytotoxicity divided recessive injury and expressive injury. Recessive injury is caused by the absorption of pesticides , phytotoxicity symptoms generally obvious, often at low temperatures inhibit the performance of crop growth , dark green leaves , and then when the temperature leggy , greed green late , resulting in crop yield and quality decreased . Performance of herbicide injury symptoms, easily recognizable , trigger sprayer spraying in high temperature conditions typically exhibit leaves burns spots, leaves Kujiao other symptoms.
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