Results 71 to 80 of about 379,690 (295)
Spatial distribution of the natural enemies of the cotton aphid, and the comparison of its estimating procedures in cotton fields of Gorgan, Iran [PDF]
نامه انجمن حشرهشناسی ایران, 2008 Spatial distribution of different natural enemies of the cotton aphid, Aphis gossypii Glover, was determined by fitting data to either Poisson (random) or negative binomial (aggregated) distributions and calculating dispersion indices, during 2002 and ...
A. Afshari +8 more
doaj
Journal of Applied Mathematics, 2013 By using pollution model and impulsive delay differential equation, we formulate a pest control model with stage structure for natural enemy in a polluted environment by introducing a constant periodic pollutant input and killing pest at different fixed ...
Bing Liu, Ling Xu, Baolin Kang
doaj +1 more source
Preliminary study on a predacious natural enemy, Broad vein-longitudinal striped ladybug Brumoides lineatus (Weise) [PDF]
, 1988 Originating text in Chinese.Citation: Weng, Wenshen, Huang, Yuqing. (1988). Preliminary study on a predacious natural enemy, Broad vein-longitudinal striped ladybug Brumoides lineatus (Weise).
Huang, Yuqing, Weng, Wenshen
core
Sexual reproduction in invasive Japanese knotweed (Reynoutria japonica) in south Sweden
Nordic Journal of Botany, EarlyView.To understand the potential for northward expansion of knotweeds into currently uninvaded regions, it is crucial to assess the potential for sexual reproduction alongside the ongoing vegetative spread. For that reason, we tested viability in Reynoutria japonica seeds in south Sweden, a region where viable seeds had not been previously reported ...
Tina D'Hertefeldt +5 more
wiley +1 more source
Acta Biológica Colombiana, 2021 In this work, the wasp Brachymeria podagrica is recorded for the first time for Colombia, a solitary parasitoid of larvae of the Peckia collusor fly. Third instar larvae of P.
MANUEL ALEJANDRO RAMIREZ MORA +1 more
doaj
Coexistence, crossover and extirpation in coalescent communities and ecotones
Oikos, EarlyView.When two ecological communities come into contact, the strength of their mixing determines whether species coexist, extirpate, or extend their ranges. We present analytical formulas and simulations describing these transitions. Specifically, we derive abundance shifts upon community coalescence, identify the critical mixing strength leading to first ...
Martin Heidelman, Dervis Can Vural
wiley +1 more source
Pengelolaan Ekosistem Untuk Pengendalian Hama Lada [PDF]
, 2006 Ecosystem Management for Controlling Black Pepper PestPest is one of the obstacles of black pepper production in Indonesia. The pest attacks all parts of the plant such as inflorescens, fruits, shoots, branches and stems at nursery as well as in the ...
LABA, I. W. (I), TRISAWA, I. M. (IWA)
core
US assessments of Japanese ground warfare tactics and the Army’s campaigns in the Pacific theaters, 1943-45: lessons learned and methods applied [PDF]
, 2009 The article examines the evolution of US intelligence assessments of the Imperial Japanese Army's tactical methods during the Pacific War, and explains how the resulting perceptions influenced the development of American doctrine for fighting the ...
Ford, D
core +2 more sources
Oikos, EarlyView.Seed dispersal by frugivores is a central process linking plant reproduction, animal foraging, population persistence, and ecosystem resilience. Currently, the spatial template sustaining these interactions is rapidly reconfigured by habitat loss and fragmentation promoted by human activity.
Eliana Cazetta, Paulo R. Guimarães Jr
wiley +1 more source
KERAGAMAN ARTHROPODA PADA SACHA INCHI DI LAHAN KERING
Caraka Tani: Journal of Sustainable Agriculture, 2017 Dryland is one of the most potential ecosystems for cultivated land. Sacha inchi (Plukenetia volubilis L.) is perennial plant originated from Peru and spread to the tropic area like China and Thailand.
Khairun Nisa +2 more
doaj +1 more source