Efficacy of garlic Allium sativum (L.) against pulse beetle Callosobruchus chinensis (L.) in chickpea seeds

dc.contributor.advisorRam Singh
dc.contributor.authorA. Arulraj
dc.date.accessioned2016-11-16T11:02:18Z
dc.date.available2016-11-16T11:02:18Z
dc.date.issued2009
dc.description.abstractThe garlic products viz, oil, powder and extracts (methanol, hexane, chloroform and acetone) were tested for their insecticidal activities against adults of Callosobruchus chinensis (L.) in chickpea seeds using contact, fumigant and repellent methods. Garlic oil at 0.5% and 1.5%, garlic powder at 2 and 4%, extracts at 2 and 3% were used to test the contact action and persistence of these products. For contact action, observations were recorded after 1, 3, 5 and 7 days of release of beetles at 45 days interval up to 6 months. Responses varied according to products, doses and periods. Garlic oil 0.5 and 1.5% gave 100% adult mortality after one day of release of the beetles, methanol extract 3% and hexane extract 3% showed 100% adult mortality after 3 days of release whereas x rest of the treatments exhibited 100 % adult mortality after 7 days of release of beetles. After 45 days of treatments, only the garlic oil 1.5% given 100% mortality after one day of release of beetles whereas in the remaining treatments adults mortality was decreased with periods. The garlic oil 1.5% protected the chickpea seeds from egg laying of pulse beetles up to six months whereas the garlic oil 0.5 %, methanol extract 2 and 3% were effective up to 7 days to prevent egg laying by pulse beetle thereafter, egg laying increased with periods. In terms of persistence of garlic products, only the garlic oil 1.5% was most effective to reduce the % seed damage, number of holes and number of eggs up to six months while, the garlic oil 0.5% and methanol extract 3% protected the seeds with tolerable limits (10% seed damage) up to two months, rest of the treatments were less effective. For fumigant action, filter paper impregnation method was used. Garlic oil 1ml/ cm2 gave 100% adult mortality within 24 h of exposure whereas methanol extract 1ml/cm2 required 24 h to give 100% mortality while, remaining treatments needed more than 72 h to give 100% mortality. In terms of egg laying, only the garlic oil prevented egg laying. For repellent action, only the garlic oil 1.5% exhibited noticeable egg reduction whereas remaining treatments less effective. The garlic products [oil at 0.5% and 1.5%, extracts (methanol, hexane, chloroform and acetone) at 2 and 3% powder at 2 and 4%] had no adverse effects on standard germination, seed vigour index of chickpea seeds and organoleptic characteristics (colour, aroma, appearance, texture, taste and overall acceptability) of chickpea grains.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/85790
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subEntomology
dc.subjectGarlic, Extraction, Sowing, Oils, Biological phenomena, Alcohols, Chickpeas, Eggs, Organic compounds, Grain legumesen_US
dc.these.typeM.Sc
dc.titleEfficacy of garlic Allium sativum (L.) against pulse beetle Callosobruchus chinensis (L.) in chickpea seedsen_US
dc.typeThesisen_US
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Efficacy of garlic Allium sativum (L.) against pulse beetle Callosobruchus chinensis (L.) in chickpea seeds
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