Influencing factors of population dynamics of cotton leafhopper
This study aimed to explore population dynamics of cotton leafhopper and its influencing factors in the field,and to provide decision-making basis for scientific control strategy.In this experiment,population of cotton leafhoppers in uncontrolled cotton fields was investigated in different years,and population dynamics of cotton leafhoppers in cotton fields with insecticide treatment and cotton fields without insecticide treatment were compared,and effects of insect-resistant cotton and neighboring crops on cotton leafhoppers population were initially explored.The results showed that cotton leafhopper was still observed on cotton plant in Nanchang and Jiujiang area in December.The peak value of cotton leafhopper population in 2022 was obviously higher than that in 2021 and 2020,and the peak time span was larger,which may be related to the drought from July to October in 2022.There was no obvious difference in the trend of cotton leafhopper population change in uncontrolled cotton fields.The peak time of cotton leafhopper in cotton fields with insecticide treatment was delayed compared with that in uncontrolled cotton field,but there was no obvious difference in the population peak value.The population dynamics of cotton leafhopper in insect-resistant cotton and non-insect-resistant cotton were basically same,but the peak value of insect population in insect-resistant cotton was higher than that in non-insect-resistant cotton.There was no obvious difference in the peak of cotton leafhopper population between the cotton and maize adjacent fields and the control,but the peak appeared later than other cultivation modes.The peak population of cotton leafhopper in cotton fields adjacent to Linglongju and Gongju were obviously higher than that in other treatments.The peak population of cotton leafhopper in cotton fields adjacent to melon and tomato were obviously lower than that in other treatments.In conclusion,cotton leafhopper has the possibility of overwintering in northern Jiangxi,the outbreak of cotton leafhopper may be related to drought,and the use of insecticides in cotton fields may only delay the peak period.Insect-resistant cotton has the tendency to increase the occurrence of cotton leafhopper.The harm of cotton leafhopper to cotton field will be increased if Linglongju and Gongju are planted next to cotton,and interplanting cotton with melon and tomato may have the potential of ecological pest control.
NETL
NSTL
万方数据
