23 Kas 2024 Cumartesi
Studies on occurrence of egg surface fungi in Muga and Eri silkworm during summer crops
Abstract :Muga (Antheraea assamensis Helfer) and Eri
silkworm (Samia ricini Donovan) are
multivoltine lepidopteran insect. The
silkworms can be reared five to six crop in a year. Aherua (June-July) and
Bhodia (August-September) are the main seed crops of muga and eri silkworm
which are link with Katia commercial
crop. Generally hatching problem was observed in muga and eri silkworms eggs in
summer crops. Therefore, a study was undertaken to find out the association of
different fungal species on egg surface of muga and eri silkworm during these two seed crops. Standard Blotter
technique and Agar plate method were used for isolation of egg surface fungi in
muga and eri silkworms. Results showed that 10 different fungal species were
isolated from muga silkworm eggs in both the seed crops. Similarly 8 different
fungal species were isolated from
the eri silkworm eggs. Among the different
fungal species Chetomonium sp., Fusarium
oxysporum, F. monoliformae, F. solani, Aspergillus flavus,
Aspergillus sp. Penicillium citrinum and
Phoma humicola were common to eggs of both the silkworm
Antheraea assamensis, commercial, egg, hatching, Samia
ricini