Biologi Lalat Sciarid, Bradysia Ocellaris (Diptera : Sciaridae), Serangga Hama pada Pertanaman Jamur Tiram

Bradysia ocellaris Comstock is an important insect pest of oyster mushroom at Bandung. Eggs are oval, 0.44 ± 0.12 mm in length, 0.26 ± 0.08 mm in width, and translucent. Larvae are worm-like, legless, translucent, and capsule distinctive black. Larvae consist four instars. Pupae are obtectate, 2040 ± 0.22 mm in length, and 0.69 ± 0.10 mm in width. Adults are small, females 2.58 ± 0.28 mm and males 2021 ± 0.28 mm in length. Life cycle is 16 -6 26 days. Larvae feed on media, mycelia and fruit bodies. Lalat Bradysia ocellaris Cumstock merupakan hama penting pada pertanaman jamur tiram di Bandung. Telur serangga berbentuk lonjong, berukuran panjang 0,44 ±0,12 mm, lebar 0,26±0,08 mm dan berwarna Bening. Larva berbentuk seperti cacing, tidak bertungkai, berwarna Bening dan kapsul kepala jelas berwarna hitam. Larva terdiri dari empat instar. Pupa obtektat, berukuran panjang 2,40±0,22 mm dan lebar 0,69±0,10 mm dan berwarna kuning coklat. Tipe pupa obtektat. Lalat dewasa berukuran relatif kecil, panjang tubuh dewasa betina 2,58±0,288 mm dan dewasa jantan 2,21±0,28 mm. Siklus hidup 16-26 hari. Larva serangga hidup dengan cara memakan media jamur, miselia dan tubuh buah jamur

Analisis Spasiotemporal Populasi Lalat Sciarid pada Budidaya Jamur Tiram

Sciarid fly (Bradysia ocellaris Comstock) population growth and its distribution in the mushroom house was studied. Insects were collected using sticky yellow traps laid on 21 stations in the house over 18 weeks. At the first time, insects population was low. After that, insect population grew and reached at a maximum level in the 8th week. In subsequent weeks, insect population fluctuated. In the other hand, insect population dispersal also occured in the house. Based on spatiotemporal analysis using contour map and semivariogram analysis, insect population showed aggregation pattern, in a small group is called subpopulation. This was related to biological characters of insect such as eggs oviposition in mass and short flights