To control Monochamus alternatus and its amount of population is one of the effective ways on controlling Bursaphelechus xylophilus.The Japanese black pine which were badly harmed by M.alternatus were sprayed with the...To control Monochamus alternatus and its amount of population is one of the effective ways on controlling Bursaphelechus xylophilus.The Japanese black pine which were badly harmed by M.alternatus were sprayed with the ditution from diluting fenitrothion · buprofezen 50%EC with water to 100 times, 200 times and 300 times. In this trial, the treatment is divided into two groups: one is of the different concentration but the same object (trees in the forest), the other is of the same concentration but different environmental condition (trees in the forest and felling trees indoor). Each treatment repeated five times. In the meantime, the check is not treated. After twice trial, the result indicated that the mortality rate of M. alternatus is 71 33%, 52 31% and 37 82% in the condition that trees in the forest were sprayed with the 100 times, 200 times and 300 times fenitrothion·buprofezen, and 69 69% in the condition that the felling trees indoor were spraded with 100 times fenitrothion·buprofezen, but the mortality rate of the check is only 8 92%. By this trial, it was also found that the dead adults of M.alternatus laid in the entrance of emergance hole, so enhancing the somatic character of fenitrothion · buprofezen can enhance the injury ratio of larva and pupae of M.alternatus.展开更多
A kinetic-spectrophotometric method for the determination of parathion,methyl-parathion and fenitrothion was developed.It was based on the kinetic reaction of these compounds with H2O2 in alkaline medium.Under the opt...A kinetic-spectrophotometric method for the determination of parathion,methyl-parathion and fenitrothion was developed.It was based on the kinetic reaction of these compounds with H2O2 in alkaline medium.Under the optimal conditions,quantitative analysis for each compound in mixtures was investigated with the aid of multivariate calibration methods.The proposed method was applied to several water samples spiked with known amounts of the pesticides with satisfactory results.展开更多
Fenitrithion was sprayed with high pressure sprayer in pine forest where Bursaphelenchus xylophilus (PWN) occurred in middle May and middle June respectively. The results showed that the adults of Monochamus alternatu...Fenitrithion was sprayed with high pressure sprayer in pine forest where Bursaphelenchus xylophilus (PWN) occurred in middle May and middle June respectively. The results showed that the adults of Monochamus alternatus (JPS) were killed and the pine tree mortality rate was very low. There was no dead tree in sprayed Pinus massoniana forest in 4 years but 6% dead rate in the CK forest in Fuyang City. The mortality rate in the sprayed Pinus nigra forest in 2 years was below 1%, but 30% in the CK forest in an island of Zhoushan City. Large number of adults of JPS reared with Pinus nigra branches which sprayed fenitrothion (200×～600×) died in 24 hours, all died in 8 days, but only 13.3% died in the CK. Applying in large area, the control effect was obvious.展开更多
文摘To control Monochamus alternatus and its amount of population is one of the effective ways on controlling Bursaphelechus xylophilus.The Japanese black pine which were badly harmed by M.alternatus were sprayed with the ditution from diluting fenitrothion · buprofezen 50%EC with water to 100 times, 200 times and 300 times. In this trial, the treatment is divided into two groups: one is of the different concentration but the same object (trees in the forest), the other is of the same concentration but different environmental condition (trees in the forest and felling trees indoor). Each treatment repeated five times. In the meantime, the check is not treated. After twice trial, the result indicated that the mortality rate of M. alternatus is 71 33%, 52 31% and 37 82% in the condition that trees in the forest were sprayed with the 100 times, 200 times and 300 times fenitrothion·buprofezen, and 69 69% in the condition that the felling trees indoor were spraded with 100 times fenitrothion·buprofezen, but the mortality rate of the check is only 8 92%. By this trial, it was also found that the dead adults of M.alternatus laid in the entrance of emergance hole, so enhancing the somatic character of fenitrothion · buprofezen can enhance the injury ratio of larva and pupae of M.alternatus.
文摘A kinetic-spectrophotometric method for the determination of parathion,methyl-parathion and fenitrothion was developed.It was based on the kinetic reaction of these compounds with H2O2 in alkaline medium.Under the optimal conditions,quantitative analysis for each compound in mixtures was investigated with the aid of multivariate calibration methods.The proposed method was applied to several water samples spiked with known amounts of the pesticides with satisfactory results.
文摘Fenitrithion was sprayed with high pressure sprayer in pine forest where Bursaphelenchus xylophilus (PWN) occurred in middle May and middle June respectively. The results showed that the adults of Monochamus alternatus (JPS) were killed and the pine tree mortality rate was very low. There was no dead tree in sprayed Pinus massoniana forest in 4 years but 6% dead rate in the CK forest in Fuyang City. The mortality rate in the sprayed Pinus nigra forest in 2 years was below 1%, but 30% in the CK forest in an island of Zhoushan City. Large number of adults of JPS reared with Pinus nigra branches which sprayed fenitrothion (200×～600×) died in 24 hours, all died in 8 days, but only 13.3% died in the CK. Applying in large area, the control effect was obvious.
