Abstract:
In Indonesia rice plant (Oryza sativa) is the main food commodity for Indonesian people. This
is because every year the need for rice in Indonesia continues to increase along with the increasing
population growth witch is very fast however, rice production often decreases due to the attack of rice
pests namely brown bars planthopper (Nilaparvata lugens Stal.). The brown planthopper attacks rice
plants during the vegetative period which results in direct or indirect damage. Most farmers still use
chemical pesticides to control pests in rice plants, but now the use of chemical pesticides is being
reduced and replaced with vegetable pesticides. Plants that can be used as botanical pesticides are
brotowali (Tinospora crispa (L.) Miers.) which can be used on the stem. The aim of the study was to
determine the effect of vegetable pesticides from brotowali stem extract and the best concentration on
the death of brown planthopper. The experimental design in this study was a randomized block design
of five treatments with a concentration of t0 : control/no treatment, t1 : 3.125% (3.125 ml brotowali
stem extract + 96.875 ml distilled water), t2 : 6.25% (6.25 ml brotowali stem extract + 93.75 ml
distilled water), t3 : 12.5% (12.5 ml brotowali stem extract + 87.5 ml distilled water), t4 : 25% (25 ml
brotowali stem extract + 75 ml distilled water) and consisted of four groups in order to 20
experimental units. The results showed that the treatment had a very significant effect on the death of brown planthopper and the best concentration of brotowali stem extract was t4 : 25% wich was
82.50% effective for hilling brown planthopper.
Keywords : food, rice, pesticides, concentration.
