ABSTRACT
A field trial was undertaken to study
the efficacy of plant extracts in the management of rice stem borers at Michael
Okpara University of Agriculture, Umudike, Southeastern Nigeria during 2016 and
2017 cropping seasons. The experiment was laid out as 3 x 4 split plot arranged
in Randomized Complete Block Design (RCBD) with three replicates. The main plot
contained varieties of rice: FARO 44, FARO 52, Ovuku and the sub plot
treatments consisted of 5 % each of aqueous extracts of Jatropha curcas L., Ageratum conyzoides L., synthetic insecticide (Furadan 4 G) and
the untreated control. Furadan 4 G was applied at 50 g per square metre. The
treatments were applied at the tillering stage and booting stage. The results
showed that Furadan 4 G and the plant extracts significantly (P<0.05) reduced
the percentage dead hearts and whiteheads caused by stem borers compared to
untreated control. The yield of the rice in the two years trials were
significantly higher (P<0.05) in Furadan 4 G treated plants followed by J. curcas and A. conyzoides than the control. FARO 44 and FARO 52 varieties were
less susceptible to the stem borers and had higher grain yield than Ovuku
variety. The results suggest that aqueous extracts of J. curcas and A. conyzoides
can be suitable alternative to synthetic insecticides for controlling rice stem
borers without altering the agro-ecosystem. Incorporating 5 % aqueous extracts
of J. curcas and A. conyzoides into lowland rice production in the area will help to
mitigate stem borers attack and improve crop yield. FARO 44 and FARO 52
varieties which demonstrated less susceptibility to the stem borers and higher
yield should be adopted by farmers to produce bulk of rice.
AGBORO, A (2023). Studies On Efficacy Of Plant Extracts In The Management Of Stem Borers On Three Rice Varieties In Umudike Southeastern Nigeria. Repository.mouau.edu.ng: Retrieved Nov 13, 2024, from https://repository.mouau.edu.ng/work/view/studies-on-efficacy-of-plant-extracts-in-the-management-of-stem-borers-on-three-rice-varieties-in-umudike-southeastern-nigeria-7-2
AGBORO, AGBORO. "Studies On Efficacy Of Plant Extracts In The Management Of Stem Borers On Three Rice Varieties In Umudike Southeastern Nigeria" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 13 Feb. 2023, https://repository.mouau.edu.ng/work/view/studies-on-efficacy-of-plant-extracts-in-the-management-of-stem-borers-on-three-rice-varieties-in-umudike-southeastern-nigeria-7-2. Accessed 13 Nov. 2024.
AGBORO, AGBORO. "Studies On Efficacy Of Plant Extracts In The Management Of Stem Borers On Three Rice Varieties In Umudike Southeastern Nigeria". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 13 Feb. 2023. Web. 13 Nov. 2024. < https://repository.mouau.edu.ng/work/view/studies-on-efficacy-of-plant-extracts-in-the-management-of-stem-borers-on-three-rice-varieties-in-umudike-southeastern-nigeria-7-2 >.
AGBORO, AGBORO. "Studies On Efficacy Of Plant Extracts In The Management Of Stem Borers On Three Rice Varieties In Umudike Southeastern Nigeria" Repository.mouau.edu.ng (2023). Accessed 13 Nov. 2024. https://repository.mouau.edu.ng/work/view/studies-on-efficacy-of-plant-extracts-in-the-management-of-stem-borers-on-three-rice-varieties-in-umudike-southeastern-nigeria-7-2