Articles

Found 2 Documents
Search
Journal : Jurnal Perlindungan Tanaman Indonesia

Fenomena dan Terminasi Diapause Penggerek Batang Padi Putih (Scirpophaga innotata) Solikhin, Solikhin
Jurnal Perlindungan Tanaman Indonesia Vol 5, No 2 (1999)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12751

Abstract

Diapause of larvae of the white stem borers, Scirpophaga innotata (Walker), is interesting and can be terminated by exposing them in a certain low thermoperiod, so that the brain is activated to initiate the production of prothoracotropic hormone (PITH). In this case water is strongly suggested responsible for stabilizing this low thermoperiod by mechanism of buffering (capture and release) heat.
Periodisitas Harian Kehadiran Walang Sangit (Leptocorisa oratorius F.) pada Kepiting yang Membusuk Solikhin, Solikhin; Martono, Edhi
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 2 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12957

Abstract

To know daily periodicity attendance of rice bug (Leptocorisa oratorius F.) in response to sixth-day-decaying crab, an experiment was conducted in four consecutive days in May 1997 in Gamping, Special Territory of Yogyakarta. The experiment consisted of 17 treatments and 3 replications arranged in randomized completely block design. Seventeen hourly observations (treatments) were made on rice bugs attendance on the decaying crab by direct counting as well as the relative humidity and temperature from 5 am to 9 pm. The result of the experiment showed that the peaks of rice bug attendance were from 10 am to 6 pm, while the highest one was at 5 pm (20 rice bugs).