Bioefficacy of different insecticides on cowpea aphid (Aphis craccivora Koch)

Abstract

Aphid (Aphis craccivora Koch) is one of the serious pests of cowpea. Bioefficacy of four insecticides with different concentrations namely Jholmol (125 ml/L), Neemix (2 ml/L), Cannabis extract (100 g/L), Chlorpyrifos 50% EC and Cypermethrin 5% EC (2 ml/L) along with control were evaluated against aphid at Research Station of Agriculture and Forestry University, Rampur, Chitwan, Nepal in 2018. Five treatments; four different insecticides and control were laid out in a randomized complete block design with four replications. The results indicated that all the insecticides were significant for aphid reduction. The effects were higher in Neemix followed by Jholmol and cannabis extract. The yield of cowpea was significantly highest (11.10 t/ha) with Neemix application, while lowest in control (7.58 t/ha). The highest net profit (NRs.61670) was obtained in Neemix followed by treatments of Jholmol (NRs.46175) and Cannabis extract (NRs.35815). The lowest incremental Cost/Benefit ratio was obtained in Neemix (1.341) and followed by treatments of, jholmol (1/1.12) and Cannabis extract (1/0.85), respectively. Thus, application of Neemix @ 2 ml/L could be used in cowpea to control aphid with high yield.

Perfect Complementarity Mechanism for Aphid Control: Oligonucleotide Insecticide Macsan-11 Selectively Causes High Mortality Rate for Macrosiphoniella sanborni Gillette

“…For example, there have been developments using a similar protection approach based on modified anti- The wave of "green" technologies and the need to take care of the environment have contributed to increasing consumer demands for manufactured products [8]. To date, chemical insecticides [9,10] and biological control methods include botanical insecticides based on the leaf extracts of Toona sinensis L., Tithonia diversifolia (Hemsl.) A.…”

Recent advances in cowpea IPM in West Africa

“…Despite its importance, cowpea production is continuously challenged by many biotic stresses, of which insects represent the most economically significant group (Agunbiade et al, 2013;Togola et al, 2017;Togola et al, 2020). They represent the most challenging threat to cowpea production and productivity (Souleymane et al, 2013;Mekonnen et al, 2022) as they can induce up to 100% yield losses in cases of severe infestations, especially if no control measure is taken (Dugje et al, 2009;Togola et al, 2017;Dhakal et al, 2019;Egho, 2021). Also, many insect pests affect cowpea during storage, resulting in significant losses (30-90%) after a few months of storage (Gomez, 2004).…”