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Population dynamics of insect pests and pollinators associated with Litchi chinensis Sonn.

KrishiKosh

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Title Population dynamics of insect pests and pollinators associated with Litchi chinensis Sonn.
 
Creator Joshi, Sanjay Kumar
 
Contributor Singh, C.P.
 
Subject infestation, population dynamics, Statherotis leucaspis, litchies, horticulture, foliage, feeders, insect pests, pollinations, pollinatorsLitchi chinensis,
 
Description Thesis-PhD
The leaf infestation pattern as well as population dynamics of five different foliage feeders (Statherotis leucaspis Meyrick, Dudua aprobola Meyrick, Acrocercops cramerella Snellen, Popillia japonica Newman and Weevils) was observed in litchi crop at Horticulture Research Centre Pattharchatta during 2011-013. The incidence of all insect pests once in a year except in leaf roller where it was twice in a year. The incidence of all the pests was maximum in East direction and minimum incidence was recorded in North direction. The population as well as leaf infestation was minimum in high density orchard (1.0 × 0.5 Metre). Low density orchard (8.0 × 8.0 Metre) was preferred for maximum infestation by all pests. The abiotic factors (Temperature and Relative humidity) had significant impact on pest incidence. Rainfall was a limiting factor for all the insect pests. The relative abundance of different insect pollinators during the flowering season was found maximum in the end of March in East direction. The maximum abundance of Apis mellifera (3.1 and 4.2 foragers/inflorescence/3minute), Apis dorsata (1.4 and 0.8 foragers/inflorescence/3minute) and Syrphid flies (10.4 and 0.9 foragers/inflorescence/3minute) was recorded at 1100 hours during the year 2011 and 2012 respectively. The maximum abundance of Trigona laeviceps Smith and Coccinella septempunctata was in
the evening hours (1400 and 1700 hours). The surrounding environment of inflorescence had more impact on the relative abundance of pollinators than the open environment of location.
 
Date 2016-06-17T12:20:11Z
2016-06-17T12:20:11Z
2013-06
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67527
 
Language en
 
Format application/pdf
 
Publisher G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)