APLIKASI BIOINSEKTISIDA Bacillus thuringiensis DARI BERBAGAI MEDIA LIMBAH CAIR DALAM PENGENDALIAN LARVA Oryctes rhinoceros PADA SUHU BERBEDA

LUKITO, PENDI and Pujiastuti, Yulia (2022) APLIKASI BIOINSEKTISIDA Bacillus thuringiensis DARI BERBAGAI MEDIA LIMBAH CAIR DALAM PENGENDALIAN LARVA Oryctes rhinoceros PADA SUHU BERBEDA. Undergraduate thesis, Sriwijaya University.

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Abstract

death to oil palm in Indonesia. The larvae of the horn beetle O. rhinoceros attack the shoots at the base of the oil palm stem which causes the growth of bees to be stunted or broken after the leaves begin to open. One good control in reducing the population of O. rhinoceros is by using B. thuringensis bacteria. B. thuringensis can be used as a bioinsecticide that can control O. rhinoceros larvae, B. thuringensis has a positive gram that can parasitize into the host's body and has great potential in controlling O. rhinoceros but many people still don't know about it. Therefore, in this study, the aim was to observe the effect of the bioinsecticide activity of insects on the mortality and development of O. rhinoceros. This study used a test method on third instar O. rhinoceros larvae, and used a Completely Randomized Factorial Design (Factorial RAL) repeated three times with 1 control and 4 wastewater treatments, namely P1=rice washing water + tofu liquid waste, P2= old coconut water + cow biourine, P3 = rice washing water + molasses, and P4 = old coconut water + rabbit biourine then observed for 28 days. The observed variables included the effect of B. thuringensis bioinsecticides on mortality, body length, body weight and excrement weight of O. rhinoceros larvae. The results in this study on the four bioinsecticides with the active ingredient B. thuringensis microscopically had different morphological characteristics of the bacterial structure. Bioinsecticides with active ingredients B. thuringensis which have the highest toxicity in controlling O. rhinoceros larvae, namely at the 2nd temperature with treatment P4 = old coconut water + rabbit biourine with mortality reaching 77,50%, for the best mortality LT50 and LT95 were at the 3nd temperature The first 2 treatments are 17,36 and 34,73. by showing symptoms of infection the larvae die, soften, and have holes like pores resulting from the rupture of the digestive organs of the larvae. In this study, four bioinsecticide treatments with active B. thuringensis was proven to reduce the population of O. rhinoceros larvae. The conclusion in this study is that of the four bioinsecticide treatments with active ingredients B. thuringensis can infect and kill to reduce the larval population with the highest toxicity in treatment P4 = old coconut water + rabbit biourine with a mortality of 77,50% Keywords: Bacillus thuringensis, Oryctes rhinoceros, Bioinsecticide, Liquid waste

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Bacillus thuringensis, Oryctes rhinoceros, Bioinsektisida, Limbah cair
Subjects:	S Agriculture > S Agriculture (General) > S589.75-589.76 Agriculture and the environment
Divisions:	05-Faculty of Agriculture > 54295-Plant Protection (S1)
Depositing User:	Pendi Lukito
Date Deposited:	29 Dec 2022 04:01
Last Modified:	29 Dec 2022 04:01
URI:	http://repository.unsri.ac.id/id/eprint/84904

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