
Chinese Journal OF Rice Science >
Effects ofBiochar Amendment to Soil on Life HistoryTraits of Laodelphaxstriatellus(Hemiptera: Delphacidae) on Rice Plants
Received date: 2017-09-15
Online published: 2018-03-10
【Objective】To investigate the potential of biochar application in the control of crop pests, weevaluated the effect of biochar amendment to soil on the small brown rice planthopper(Laodelphaxstriatellusas)on rice. 【Method】Laboratory experiments were conducted using a 2 × 3 factorial design to explore the effect of the two independent variables (biochar type and application level) on developmental and reproductive performances of the insect on potted rice plants.【Result】1) Biochar type and application level had an interactive effect on the nymphal duration, which though did not vary with application levels when corn or rice biochar was applied, yet significantly prolonged by 1.54 days when wheat biochar was applied at 30 g/kg compared to 18.70±0.30 d in the control. 2) Biochar type and application level did not have interactive effects on longevity of female adults. Biochar application level did not influence female adult longevity, but corn biochar significantly increased the longevity by 2.13 d compared to 23.70±0.48d with addition of rice biochar, for wheat biochar,by 3.10 d. 3) There was abiochar type × application levelinteraction effect on fecundity. Biochar amendment decreased lifetime fecundity of L. striatellusbut the effect varied with biochar type and application level. At 30 g/kg biochar level, the fecundity increased for corn biochar by 22.80 and 18.95 eggs compared to those, for rice and wheat biochar respectively. At 50 g/kg biochar level, the fecundity decreased for corn biochar by 16.90 and 21.60 eggs compared to thosefor rice biochar and wheat biochar.【Conclusion】Biochar amendment to soil can have a negative impact on fecundity of L. striatellus, yet theimpact varies with biochar type and application level.
Key words: biochar; rice planthopper; development; reproduction; soil amendment
Qiang FU, Baoping LI, Ling MENG . Effects ofBiochar Amendment to Soil on Life HistoryTraits of Laodelphaxstriatellus(Hemiptera: Delphacidae) on Rice Plants[J]. Chinese Journal OF Rice Science, 2018 , 1(1) : 200 -206 . DOI: 10.16819/j.1001-7216.2018.7113
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