Effect of plant oils on adult egg laying, emergence, and weight loss of Collosobruchus analis (Fab.) in green gram (Vigna radiata L. Roxb)
2016
Khanzada, S.R. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Entomology) | Khanzada, M.S. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Entomology) | Abro, G.H. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Entomology) | Syed, T.S. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Entomology) | Ali, S. (Karachi Univ. (Pakistan). PARC Crop Diseases Research Inst.) | Anwar, S. (Sugarcane Research Inst., Mardan (Pakistan))
The experiment was carried out under laboratory conditions in which four plant oils i.e. Mustard (Brassica compestris) L, Coconut (Cocus nucifera) L, Sesame (Sesamum indicum) L. and Rocket seed (Eurica sativa) Mill, were tested against pulse beetle, Callosobruchus analis) Fab. in green gram. The standard quantity of each oil was 0.25 ml mixed with the 250 grams of green gram kept in plastic jars covered with Muslim cloth. Four pairs, one day old adults were released in each jar. The result indicated that the Rocket seed oil was the most effective followed by coconut oil, sesame oil and mustard oil which resulted in low egg laying and reduced adult emergence. The minimum eggs (4.20 plus minus 0.57) were observed in rocket seed oil followed by mustard oil (8.31 plus minus 0.78), sesame oil (9.46 plus minus 0.74) and coconut oil (9.96 plus minus 0.75), where as maximum eggs (12.16 plus minus 1.18) were recorded in control treatment. Similarly, the minimum adult emergence (2.27 plus minus 0.32) was observed in rocket seed followed by mustard (4.33 plus minus 0.68) coconut (5.60 plus minus 0.65) and sesame (6.65 plus minus 0.66). The minimum weight loss (8.26%) was also observed in green gram with rocket seed oil followed by mustard oil (20.57%), sesame oil (25.63%) and coconut oil (36.13%). The maximum weight loss (56.14%) was recorded in control treatment.
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