BIOECOLOGY AND MANAGEMENT OF MULBERRY THRIPS, Pseudodendrothrips mori (NIWA)
Loading...
Date
2012-06-05
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES RAICHUR
Abstract
ABSTRACT
Studies on biology, seasonal incidence and management of thrips,
Pseudodendrothrips mori (Niwa) on mulberry was undertaken at Department of
Entomology, College of Agriculture, Raichur, during 2011-12.
Pseudodendrothrips mori (Niwa) eggs were inserted in the leaf tissue near the
midrib and side veins. The incubation period was 6.17 ± 0.24 days. It has two nymphal
instars, pre- pupa and pupa with duration of 2.70 ± 0.32, 3.53 ± 0.40, 1.10 ± 0.21 and 2.30
± 0.25 days, respectively. The longevity of male and female was 4.57 ± 0.42 days and
6.70 ± 0.37 days, respectively. Pre-oviposition, oviposition and post oviposition periods
were averaged to 2.17 ± 0.24, 2.23 ± 0.26 and 1.87 ± 0.35 days, respectively and the
average fecundity was 15.30 ± 1.71eggs. The total life cycle was averaged to 20.94 ± 1.17
days.
Seasonal incidence of thrips, P. mori, mites, Polyphagotarsonemus latus and
white fly revealed that the highest mean population of these pests was observed during
summer months. The population of thrips showed significant positive correlation with
maximum temperature and significant negative correlation with relative humidity.
Studies on the efficacy of insecticides and a botanical against mulberry thrips
revealed fipronil, flupyradifurone, imidacloprid, thiamethoxam and acetamiprid were
found to be most effective and were on par with each other in reducing the thrips
population up to five days after spray.
The waiting period study indicated that safe waiting period of seven, nine, 11, 15
(both), 21 (both) and 35 days nimbicidine, dichlorvos, fipronil, flupyradifurone and
imidacloprid, acetemiprid and thiamethoxam and spinosad, respectively. The residual
toxicity of insecticides and a botanical on economic parameters of mulberry silkworm
indicated that there was no deleterious effects on silkworm growth and development as
evidenced through non-significant differences in economic and survival parameters.
Description
----
Keywords
null
Citation
----