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Diversity of spiders as influenced by cultivation techniques in rice

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Title Diversity of spiders as influenced by cultivation techniques in rice
Not Available
 
Creator Anitha G, Chitra Shanker, Shashibhushan V, Srinivas C and Uma Devi G
 
Subject Spiders, biodiversity, rice, cultivation systems, abundance, organic, farmers’ practice, no protection, guilds, assemblages, diversity indices
 
Description Not Available
Field studies were carried out in wet seasons of 2014 and 2015 in rice fields of College Farm,
Rajendranagar, Hyderabad to understand the abundance and biodiversity of spiders in varied
rice cultivation systems. Design of the experiment was split plot with three main modules,
viz., transplanted, broadcasted and drum sown rice and subtreatments under each main
module included three plant protection methods viz., organic protection, farmers’ practices
and ‘no protection’ practices. Results showed that predator numbers in ‘no protection’ and
organic protection plots of all main treatments were more than in farmers’ practices
indicating the impact of the chemical pesticides. A total of 22 genera of spiders belonging to
12 families were recorded which comprised of seven guilds based on their hunting strategies
and microhabitats. Shannon diversity index ranged between 1.83 and 2.26 and Pielou's
evenness index was 0.59–0.72 in two years of study indicating a stable ecosystem and even
species distribution in rice crop at Rajendranagar. Study of the guild assemblage indicated
that orb-weavers constituted 28.1% of the population, ground runners 23.51%, space web
builders 18.38%, sheet-web builders 13.12%, stalkers 8.04% and ambushers made upto
0.38% of the spider population. Understanding the vertical stratification of various spider
genera on the plant gave further insight into the prey preferences of these predators.
Not Available
 
Date 2023-02-13T07:56:23Z
2023-02-13T07:56:23Z
2019-01-01
 
Type Journal
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/76099
 
Language English
 
Relation Not Available;
 
Publisher Not Available