ABSTRACT
Field
and laboratory experiments were conducted between 2017 – 2020 cropping seasons
at Vegetable Farm of National Horticultural Research Institute (NIHORT) Mbato
Okigwe Outstation, Imo State, Nigeria to study the efficacy of Tephrosia vogelii aqueous and ethanol
extracts in the control of Eggplant Fruit and Shoot Borer (EFSB); Leucinodes Orbonalis Guen infesting
eggplants. In experiment one, five varieties of eggplant (Solanum gilo, S. macrocarpon, S. ex-lantan, S. aethiopicum, S.
melongena) were screened in the field for their susceptibility to EFSB. The
treatments were arranged in Randomized Complete Block Design (RCBD) with four
replications. Data on adult moth and larval population, length of feeding
tunnel, numbers of holes on fruits and shoots were assessed. In experiment two,
laboratory studies were carried out to determine the insecticidal properties of
eggplant varieties and Gas Chromatography and Mass Spectrum (GC-MS) analysis
was used to identify the bioactive volatile compounds of T. vogelii. In experiment three, field control of EFSB on the most
susceptible eggplant variety (S. gilo)
using T. vogelii extracts (10%w/v,
20%w/v, 30%w/v, 9%v/v, 18%v/v and 27%v/v) and frequency of application [Once a week (1W), once in two weeks (2W) and
Once in three weeks (3W)]was conducted. The experiment was laid out in 8 × 3
factorial fitted into RCBD with three replications. Data on population of adult
moth, number of holes on shoots and fruits, fruit yield, percent reductions in
yield damage, yield increase and yield damage were assessed. Data collected
were subjected to Analysis of Variance (ANOVA) using GenStat Software Programme
(2010). Significant means were compared with Least Significance Difference
(LSD) at P ≤ 0.05. Results showed that population of L. orbonalis adult moth infestation peaked (16.15) in September. S. gilo was the most susceptible
eggplant variety with 32.10 % larval infestation. Phytochemical analysis
revealed that S. gilo had lowest
concentrations of flavonoids, alkaloids, saponins, glycoside, tannin except
steroid which was found in high concentrations. The GC-MS analysis of T. vogelii identified 58 bioactive
volatile compounds with Benzene,
1,3-bis (2,2-dimethylpropyl), 2,4,5,6-tetramethyl- (19.78 %), Benzo(c)carbazole
(6.98%), 7-Oxabicyclo (4.1.0) heptane, 3-Oxiranyl- (6.1 %) as some of
predominant compounds. Once a week (1wk) application of treatments have
significant effect (P≤0.05) on percent reduction in numbers of holes, damage
fruits and uninfested shoots in the first and second cropping seasons. Highest
yield (1.6t/ha) was obtained in plots treated to 1W application.
ONYEKACHI, A (2024). Use of Tephrosia Vogelii For the Control of Eggplant Shoot and Fruit Borer, Leucinodes Orbonalis Guen. (Lepidoptera: Pyralidae) Infestation in Okigwe, Imo State :- Uwalaka, Onyekachi A.. Repository.mouau.edu.ng: Retrieved Sep 07, 2024, from https://repository.mouau.edu.ng/work/view/use-of-tephrosia-vogelii-for-the-control-of-eggplant-shoot-and-fruit-borer-leucinodes-orbonalis-guen-lepidoptera-pyralidae-infestation-in-okigwe-imo-state-uwalaka-onyekachi-a-7-2
ANOZIE, ONYEKACHI. "Use of Tephrosia Vogelii For the Control of Eggplant Shoot and Fruit Borer, Leucinodes Orbonalis Guen. (Lepidoptera: Pyralidae) Infestation in Okigwe, Imo State :- Uwalaka, Onyekachi A." Repository.mouau.edu.ng. Repository.mouau.edu.ng, 08 May. 2024, https://repository.mouau.edu.ng/work/view/use-of-tephrosia-vogelii-for-the-control-of-eggplant-shoot-and-fruit-borer-leucinodes-orbonalis-guen-lepidoptera-pyralidae-infestation-in-okigwe-imo-state-uwalaka-onyekachi-a-7-2. Accessed 07 Sep. 2024.
ANOZIE, ONYEKACHI. "Use of Tephrosia Vogelii For the Control of Eggplant Shoot and Fruit Borer, Leucinodes Orbonalis Guen. (Lepidoptera: Pyralidae) Infestation in Okigwe, Imo State :- Uwalaka, Onyekachi A.". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 08 May. 2024. Web. 07 Sep. 2024. < https://repository.mouau.edu.ng/work/view/use-of-tephrosia-vogelii-for-the-control-of-eggplant-shoot-and-fruit-borer-leucinodes-orbonalis-guen-lepidoptera-pyralidae-infestation-in-okigwe-imo-state-uwalaka-onyekachi-a-7-2 >.
ANOZIE, ONYEKACHI. "Use of Tephrosia Vogelii For the Control of Eggplant Shoot and Fruit Borer, Leucinodes Orbonalis Guen. (Lepidoptera: Pyralidae) Infestation in Okigwe, Imo State :- Uwalaka, Onyekachi A." Repository.mouau.edu.ng (2024). Accessed 07 Sep. 2024. https://repository.mouau.edu.ng/work/view/use-of-tephrosia-vogelii-for-the-control-of-eggplant-shoot-and-fruit-borer-leucinodes-orbonalis-guen-lepidoptera-pyralidae-infestation-in-okigwe-imo-state-uwalaka-onyekachi-a-7-2