Efficacy of Botanicals against <i>Helicoverpa armigera</i> (Hubner) in Tomato

Abstract

Four botanicals viz., mahogany oil, mahogany seed extract, tobacco leaf extract, neem seed kernel extract along with one synthetic chemical, cypermethrin were tested for their efficacies against H. armigera. The lowest fruit infestation, both by number and weight, was observed in neem seed kernel extract (27.15%, 22.29%) treated plot which was statistically similar to tobacco leaf extract (27.71%, 23.31%) treated plot and cypermethrin (28.87%, 25.44%) treated fruits. While no significant difference was found among mahogany oil, mahogany seed extract and control treatments. Percent infestation reduction over control was the highest in neem seed kernel extract (30.08%) followed by tobacco leaf extract (28.68%). The highest yield (18.14 t/ha) and the highest MBCR (2.99) were also obtained from neem seed kernel extract treated fruits.

Comparative efficacy and economics of selected bio pesticides with Chlorantraniliprole against tomato fruit borer [Helicoverpa armigera (Hubner)] on tomato [Solanum lycopersicum L.]

“…It is followed by T4 Nisco Sixer Plus 2ml/lit (11.35%) and the similar report was recorded by Tejeswari et al (2021)18 . T5 Neem Seed Kernal Extract (12.939%) and the similar report was recorded by Rahman et al (2014)13 . T6 Azadirachtin 5% (14.234%) and the similar was reported by Hivare et al (2019)6 .…”

“…(1:8.1). Next effective treatment was T 5 -Neem seed Kernal Extract (160 q/ha and 1:6.9 respectively), this was supported by Rahman et al (2014) .…”

Nano Bio Pesticide to Constraint Plant Destructive Pests

“…Large number of curative plants that have a characteristic of larvicidal and pesticidals activity such as neem extract [8], Acorus calamus, Annona squamosa, Vitex negundo [18], Gnidia glauca, Toddalia asiatica [19] and Argimone maxicana [9], Calotropis procera [10]. The work of [20] confirms the percent infestation reduction is highest in neem seed kernel extract (30.08%) followed by tobacco leaf extract (28.68%). The aqueous extract of neem seed kernel (NKAE) was tested in laboratory condition to evaluate its antifeedant, ovicidal, nymphl duration and hatching performance on tea mosquito bug (Helopeltis theivora) [21].…”

A Review on the Biology, Ecology, and Management Tactics of Helicoverpa armigera (Lepidoptera: Noctuidae)

“…The toxins, for example, Cry1Ac, Cry2Ab, and Vip 3A created by Bt cotton assortments are just ingested by the phytophagous insects and, accordingly, they have little impact on useful insects and further definitely works on the yields by stifling H. armigera (Stark & Banks, 2003;Mamoon-ur-rashid et al, 2012;Vinutha et al, 2013;Mapuranga et al, 2015;Saraf et al, 2015). Tobacco leaf extract 12.5 g/L (Rahman et al, 2014) Figure 5. Components of integrated Helicoverpa armigera management…”