as to whether foliar fertilizer and pesticide can be mixed, it is necessary to read the instructions carefully before mixing according to the specific introduction of the drug. in fact, due to the different properties of various fertilizers and pesticides, if the mixture is not reasonable, it will affect the effect of fertilizer application, and even produce fertilizer damage! therefore, the following points should be paid attention to when foliar fertilizer is mixed with pesticide
1、 it is necessary to ensure the stability of foliar fertilizer and pesticide after mixing
this is because foliar fertilizer may have chemical or physical reactions with pesticides, affecting the effectiveness of pesticides or causing pesticide damage.
if the liquid medicine has bad performance, it is not suitable for mixed use. after mixing, even if the physical properties of the solution are good, a small-scale test should be carried out first to see whether it is easy to cause fertilizer damage and pesticide damage, and then use it in a large area.
2、 attention should be paid to the mixing order of foliar fertilizer and pesticide
generally, a single agent solution is prepared with sufficient water first, and then diluted with this solution. it is not allowed to mix two single agents first and then dilute with water, so as to avoid adverse reactions, causing damage to effective components and deterioration of physical properties.
when foliar fertilizer is mixed, the order of mixing foliar fertilizer and pesticide is usually as follows: foliar fertilizer, wettable powder, suspending agent, water agent and emulsifiable concentrate are added in turn. when one kind of foliar fertilizer is added, the mixture is fully mixed, and then the next one is added.
3、 the main amount of water to be mixed
water has a great influence on the liquid medicine, such as ph and ion concentration of water. it is better to use neutral water with low ion concentration, such as clean rainwater and river water.
4、 pay attention to the current configuration and use
although there is no adverse reaction when the solution is just prepared, it is easy to produce slow reaction after long-term storage, which may lead to the loss of efficacy or damage.
for example, some pesticide varieties are stable under weak alkaline conditions, but they should be prepared and used now. if they are placed for a long time, they are easy to lose efficacy.
5、 taboo of mixed use of foliar fertilizer and pesticide
1. alkaline pesticides should not be mixed with ammonium nitrogen fertilizer and superphosphate, otherwise ammonia volatilization loss and fertilizer efficiency would be reduced;
2. the pesticide containing arsenic should not be mixed with potassium salt and sodium salt chemical fertilizer, otherwise soluble arsenic will be produced and pesticide damage will occur;
3. alkaline fertilizers such as ammonia, lime and plant ash should not be mixed with pesticides such as pesticides, otherwise the efficacy will be reduced;
4. chemical fertilizers should not be mixed with microbial pesticides. because chemical fertilizer is volatile and corrosive, it is easy to kill microorganisms and reduce control effect when mixed with microbial pesticides such as chilo suppressalis and qingchongjun!