Abstract
[Objective] The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6. [Method] Different amounts of rice brown planthopper were released to super indica and japonica hybrid rice Yongyou 6 during tillering, booting and gain filling stage, respectively. The reproductive rate and variation dynamics of rice brown planthopper in super rice was also investigated and analyzed. [Result] Tillering stage: the population quantity of rice brown planthopper during booting and gain filling stage gradually increased with the increasing basal amount of its population during tillering stage; when the population density of rice brown planthopper during grain filling stage reached a certain limit (250 head/cluster), the population density during milking stage showed decrease trend with the increasing of such density; the development of rice brown planthopper population in super rice Yongyou 6 showed the characteristics of fast in middle and slow in two ends. Booting stage: the development of rice brown planthopper population from booting to gain filling stage increased with the increasing basal amount of density, and their correlation during milking stage was not significant; rice brown planthopper population still had high reproduction capacity in the middle and late stage of super rice, which had latent risk on rice yield. Gain filling stage: when population density of rice brown planthopper 70 head/cluster, the development of it population increased with the increase of basal amount of density, which had great threat to yield. [Conclusion] The result provided theoretical basis for establishment and improvement of monitoring early warning system, cost-effective control of occurrence and damage of rice brown planthopper, and improvement of the sustained control ability against rice brown planthopper.
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Claims 8
Claim · model-written summary
Basal planthopper density at tillering increased the planthopper population during booting and grain filling.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e1“the population quantity of rice brown planthopper during booting and gain filling stage gradually increased with the increasing basal amount of its population during tillering stage”
Claim · model-written summary
When planthopper density during grain filling reached 250 head/cluster, the density during milking stage showed a decrease trend with increasing density.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e2“when the population density of rice brown planthopper during grain filling stage reached a certain limit (250 head/cluster), the population density during milking stage showed decrease trend with the increasing of such density”
Claim · model-written summary
The development of the planthopper population on Yongyou 6 was fast in the middle and slow at both ends of the period.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e3“the development of rice brown planthopper population in super rice Yongyou 6 showed the characteristics of fast in middle and slow in two ends”
Claim · model-written summary
Basal planthopper density during booting increased population development from booting to grain filling.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e4“the development of rice brown planthopper population from booting to gain filling stage increased with the increasing basal amount of density, and their correlation during milking stage was not significant”
Claim · model-written summary
The correlation between basal density and population during milking stage was not significant.
- Taxon
- rice Yongyou 6e0
- Treatment
- basal amount of densitye4
- Interactor
- rice brown planthoppere4pest
- Outcome
- correlation during milking stagee4
Not reportedDirection
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e4“the development of rice brown planthopper population from booting to gain filling stage increased with the increasing basal amount of density, and their correlation during milking stage was not significant”
Claim · model-written summary
Planthopper populations on super rice in the middle and late stage had high reproduction capacity, with latent risk to rice yield.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e5“rice brown planthopper population still had high reproduction capacity in the middle and late stage of super rice, which had latent risk on rice yield”
Claim · model-written summary
When planthopper density during grain filling was 70 head/cluster, the development of the population increased with basal density and was a great threat to yield.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e6“when population density of rice brown planthopper 70 head/cluster, the development of it population increased with the increase of basal amount of density, which had great threat to yield”
Claim · model-written summary
The results support cost-effective control of brown planthopper occurrence and damage on rice.
Verbatim
e0“The paper was to study the density restriction effects of reproductive rate of rice brown planthopper (BPH) population in super indica and japonica hybrid rice Yongyou 6”
e7“The result provided theoretical basis for establishment and improvement of monitoring early warning system, cost-effective control of occurrence and damage of rice brown planthopper”