Efficacy of lantana (Lantana camara) extract application against aphids (Brevicoryne brassicae) in rape (Brassica napus) over varied periods of time

Abstract

Contact bioefficacy of lantana (Lantana camara L.) leaf extract (LLE) against rape aphids (Brevicoryne) and distilled water were the positive and negative controls, respectively. Treatments were arranged in a randomized complete block design (RCBD); 3 x 5 factorial arrangement, replicated 5 times. Adult aphids (10) were introduced to each plant. Aphid mortality at 6, 12, 18 and 24 h after application of treatments was evaluated. There was no significant interaction between seed brand and treatment at all times. Lantana treatments showed significant mortality effect (p < 0.001) on aphids at all times. The highest LLC (3 kg l -1 ) showed the highest aphid mortality at each period of time after application, and of all the periods, the longest time after application (24 h), showed the highest mortality (9.67). It is recommended that smallholder farmers use 3 kg l -1 LLC to control aphids on rape, and allow 24 h after application to get the greatest kill.

Efficacy of Plant Extracts against Aphid <i>Lipaphis erysimi</i> (Kalt) in Brown Mustard <i>Brassica juncea</i> L

“…Singh and Lal (2012) found significant effect of locally available plant extracts like panchphuli and garlic leaf extracts. Similar results were also shown by earlier workers against mustard aphid (Baloch et al, 2018;Mvumi and Maunga, 2018;Gouvea et al, 2019). Cow urine spray control the aphid population and found to be ineffective.…”

“…Pretreatment observations were taken 24 hr before spraying Post-treatment observations were recorded after 1 st , 3 rd , 5 th and 7 th days of each spray except third spray, where the observation was made at one day after spray only. The aphids were counted manually with magnifying glass and % reductions in incidence was worked out (Mvumi and Maunga, 2018). All morphological and quality attributes were recorded at the maturity of the plants.…”

Diversity of Plant Visiting Insects of Intercrop Lantana camara in Oil Palm Plantation

“…They were 8 weeks old, with each plant height ranging from 15-30 cm. Then the seedlings were transferred from the polybags to the bunds in which each bund was planted 4 plants, having a distance among the plants of about 70 cm (Culver & Precious, 2018). (Figure 2a)…”

“…One of the benefits of this flowering plant is that it can be a refugia plant that has a role as an alternative habitat for entomopag (Karenina et al, 2020). This plant can also be used as an active ingredient for economical and evironmentally friendly bioinsecticides (Culver & Precious, 2018). It can grow with a diameter of 2-4 mm having yellow, red, light and white color (Dash et al, 2015).…”