The effect of Azadirachta indica A. Juss and Melia azedarach L. on coconut leaf pest Plesispa reichei Chap. (Coleoptera: Hispidae)
1994
Purba, A. | Nainggolan, D.S. (Pusat Penelitian Kelapa Sawit, Medan (Indonesia))
إنجليزي. A laboratory experiment at Bandar Kuala Research Station was conducted to study the use of plants Azadirachta indica (neem) and Melia azedarach (mindi) as potential botanical insecticides control on coconut pest Plesispa reichei. The neem and mindi extracts were effective to kill P. reichei adult and larva, the mortality was 44 to 76 percent. The seed neem emulsion of was more effective than leaf or mesocarp extract. By seed emulsion 50 cc/l water, the mortality was the highest, lowest leaf damage and number of egg. The effect of neem extracts was slower than synthetic insecticide. Twelve to 24 percent of the larvae exposed to the plants extract were still able to become pupae. Two to 18 percent of the pupae lived and 2-12 percent died
اظهر المزيد [+] اقل [-]مجهول. Penelitian laboratorium di Pusat Penelitian Perkebunan Bandar Kuala ini bertujuan untuk mengetahui pengaruh dan potensi tumbuhan nimba (Azadirachta indica A. Juss) dan mindi (Melia azedarach L.) sebagai bahan pengendali insektisida botanis terhadap hama daun kelapa Plessispa reichei Chap. Ekstrak tumbuhan nimba dan mindi ternyata cukup efektif untuk membunuh larva maupun imago P. reichei, mortalitas yang dicapai 44 persen - 76 persen. Emulsi biji nimba lebih efektif dibanding ekstrak daun maupun daging biji mindi. Dengan emulsi biji nimba 50 cc/l air diperoleh mortalitas tertinggi, tingkat kerusakan daun yang terjadi dan jumlah telur yang dihasilkan terendah. Pengaruh ekstrak tumbuhan nimba dan mindi kelihatan lebih lambat dibanding insektisida sintetik. Larva yang telah mendapat perlakuan ekstrak tumbuhan nimba maupun mindi, 12 persen - 24 persen masih mampu masuk ke stadia pupa. Pupa yang terbentuk bertahan hidup 2 persen - 18 persen dan mati 2 persen - 12 persen
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