Activities of neem and wood ash as biopesticides in the control of insect pests on vegetable crops in Mubi

Abstract

The study was carried out to evaluate the efficacy of neem and wood ash for the control of insect pests infesting three vegetables in the gardening; okra, spinach and sorrel. The plants were sown in a randomize complete block design (RCBD) with four replications. Treatment application starts immediately after germination and continued on 3 days interval. Parameters observed were number of damages and number of insect infestation. These were noted after 6 and 9 weeks of germination. Data collected was analyzed using analysis of variance (ANOVA). The results revealed that there was a significant difference (P>0.05) in the number of damages as well as number of insect pests encountered. Wood ash proved to be more effective in protecting the vegetables against insect pests, since it recorded significant minimum activities of insect pests. Therefore, botanicals such as neem and wood ash could be considered as an effective in alternative method of pest management. The use of biopesticides generally is encouraged since they can proffer solution of controlling insect pest without any environmental concern.

Integrating Tithonia Diversifolia, Piper Guineense and Oil Palm Bunch Residue Ash for the Management of Sweet Potato Weevil (Cylas Puncticollis Boh.) and on Yield of Sweet Potato in Fako Division of Cameroon

“…The results is with conformity with Wahedi, et al [33]; Ogbedeh and Ani [34] who reported that wood ash protects garden plants more than neem leaf powder, although all confirmed their efficacy.…”

“…Ogbuehi [32] reported that palm bunch ash can be used to amend pH of highly acidic soils as well as a nutrient supplement in soils with leached nutrients. Wahedi, et al [33]; Ogbedeh and Ani [34] in their studies concluded that palm bunch ash and neem leaf powder each consistently suppressed insects' incidence and severity. But the suppressive ability of palm bunch ash to insect incidence and severity increased with increase in rate of application [34,35], and the insecticidal properties of ashes vary according to the plant species [36].…”

The efficacy of selected local pesticides in prevention of leaf damage and improvement of yield in <i>Brassica rapa subsp. pekinensis L.</i> (Chinese cabbage)

“…The substance(s) may be able to kill or deter pests and/or pathogens of Chinese cabbage. The result of this study is in conformity with Demissie et al (2008) and Wahedi et al (2017) who demonstrated the effectiveness of wood ash against pest infestation in okra, spinach, sorrel and maize in Ethiopia and Nigeria. Additionally wood ash was found to have repulsive property against vegetable pests (Mooya, 2016).…”

Bio-Efficacy of Plant-Derived Pesticides against Fall Armyworm (&lt;i&gt;Spodoptera frugiperda&lt;/i&gt;) and Their Interactive Effects on Maize Agronomic Performance under Field Conditions

“…This could be due to the short duration of pesticidal efficacy and its potassium content affecting plant height. [26] reported that wood ash applied at 3-day intervals significantly reduced pest infestation and its protectant effect was due to the presence of potash which contains potassium. Ash concentration above 70% was found to have a deleterious effect on tomato growth [27].…”