APLIKASI BERBAGAI DOSIS BIOINSEKTISIDA CAIR BERBAHAN AKTIF Bacillus thuringiensis Berliner TERHADAP POPULASI DAN SERANGAN SERANGGA HAMA SERTA PERTUMBUHAN PADI

RINI, SISKA ENDAH SEPTA and Herlinda, Siti and Hamidson, Harman (2016) APLIKASI BERBAGAI DOSIS BIOINSEKTISIDA CAIR BERBAHAN AKTIF Bacillus thuringiensis Berliner TERHADAP POPULASI DAN SERANGAN SERANGGA HAMA SERTA PERTUMBUHAN PADI. Undergraduate thesis, Sriwijaya University.

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Abstract

The existence of pest insect on rice field might cause reduction the yield. Controlling the pest using synthetic pesticide causes environmental damages. Bacillus thuringensis is an example of biological control agent which can be safely used to control the pest. The objectives of this research were to find out the appropriate dosage of bioinseticide which could effectively control the pest insect of rice grown in swampy land and to observe the effect of the bioinseticide on the growth of rice planted in swampy land. The experiment was arranged in a grouped randomized design with five levels of bioinsecticide dosage treatments namely 0 l.ha-1(A), l.l ha-1 (B), 2 l.ha-1 (C), 3 l.ha-1 (D) and 1 l.ha-1 of biofitalik (E). The application was carried out at three (3) weeks after transplanting (wat). The observations on main rice crop were done at 2, 3, 5, 7,9 and 11 wat, while observations on ratoon rice were done at 2, 3, 5 and 7 weeks after harvesting (wah). The results of observation at 9 wap showed that the effect of treatment D on Cnaplocrosismedinalis was significantly different from that of treatment E, and treatment A significantly different from treatment B. The effect of treatment A on plant height at observation 3, 5, 7, 9 and 11 wat was significantly different from that of treatments B, C, D, and E. The effect of treatment A on plant height at 9 wap was significantly different from that of treatments B, C, D and E, while treatments B was significantly different from treatments C, D and E. The effect of treatment C on number of ear per panicle was sifnificantly different from that of treatments D, but not with treatments A, B and E. The effect of treatment B on number of empty ear per panicle was significantly different from that of treatments A, C and D, the rest treatments were not significantly different. The effects of bioinsecticide had no significant effects on the pest insect population and damage caused on ratoon rice at all observations. However, the effect of bioinsecticide on rice sapling was significant. Treatment A was significantly different from treatments C and D. The effect of bioinsecticideon ratoon height was significant, treatment C was significantly different from treatments D, A and E at observations 5 and 7 wah. The rest treatments were not significantly different. The application of various dosages of bioinsecticide containing B. thuringiensis could only significantly affect the population of Cnaphalocrosis medinalis and the damages intensity caused by the insect.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Bacillus thuringiensis, bioinsecticide, swampy rice.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1480-1496 Agricultural machinery. Farm machinery
Divisions:	05-Faculty of Agriculture > 54211-Agricultural Technology (S1)
Depositing User:	Mrs Sri Astuti
Date Deposited:	12 Dec 2019 03:56
Last Modified:	12 Dec 2019 03:56
URI:	http://repository.unsri.ac.id/id/eprint/21477

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