Bioefficacy of some insecticides and mixed formulations against mango mealy bug, Drosicha mangiferae (green)

2021 ◽  
Vol 45 (2) ◽  
pp. 239-245
Author(s):  
Lopamudra Biswal ◽  
Kiran Negi ◽  
R.P. Srivastava
Keyword(s):  
Author(s):  
Soekadar Wiryadiputra

An experiment on the effectiveness of biopesticide made of ramayana (Cassia spectabilis) and tobacco leaves (Nicotiana tabacum) it called as Casnic, on Hypothenemus hampeiand Planococcus citriand its effect on the arthropods population fauna in coffee plantation had been conducted in Pest Laboratory of Indonesian Coffee and Cocoa Researh Institute and Bangelan Plantation in Malang. The treatment consisted of three level concentrations of botanical pesticide(15 ml, 30 ml, and 60 ml/lof water), Beauveria bassiana(at a dose 100 g spore per ha), metidation spraying (2 ml formulation per litre of water) and two control treatments (with and without soap). The field experiment was arranged in randomized complete block design (RCBD) with four replications. The results showed that botanical pesticide at the concentration of 30.0 ml stock solution per litre of water and applied four times with monthly interval was effective in controlling coffee berry borer (Hypothenemus hampei) and coffee mealy bug (Planococcus citri). The effectiveness was not significantly different compared to metidation and Beauveria bassianaat the dose of 0.8 l and 100 g formulation per ha per application. Application of the botanical pesticide did not show negative effect on the usefull predatory insects and other arthropods population in coffee ecosystem. Key words : Botanical pesticide, Cassia spectabilis, Nicotiana tabacum, Coffee, Hypothenemus hampei, Planococcus citri, Arthropods.


2018 ◽  
Vol 02 (02) ◽  
Author(s):  
M Azhar Javaid ◽  
Awais Rasool ◽  
Aqsa Yaseen ◽  
Zaibunissa Kokab

2020 ◽  
Author(s):  
Gustavo Alcalá Batistela ◽  
Denise De Siqueira ◽  
Phillipe R. B. Devloo

2003 ◽  
Vol 20 (5/6) ◽  
pp. 659-674
Author(s):  
J.K. Djoko ◽  
B.D. Reddy
Keyword(s):  

1938 ◽  
Vol 3 (6) ◽  
pp. 411-422
Author(s):  
A. R. Melville
Keyword(s):  

1999 ◽  
Vol 09 (01) ◽  
pp. 139-160 ◽  
Author(s):  
EVARISTE SANCHEZ-PALENCIA

We consider the asymptotic behavior as the thickness 2ε tends to zero of thin elastic shells which are not geometrically rigid for the kinematic boundary conditions (non-inhibited shells). It is known that the limit displacement belongs to the subspace G of inextensional displacements. We write the corresponding mixed formulation with a Lagrange multiplier. It is then proved that the corresponding problem (equations and boundary conditions) is not elliptic, whatever the type of the surface. Examples are given where the interior smoothness of the data does not imply interior smoothness of the solutions. The topology of the space M of the multipliers is weaker than the L2 topology. In some cases it is even weaker than that of distributions (sensitivity phenomenon). As a consequence, the convergence of the problem in mixed formulation for thickness 2ε as ε tends to zero only holds in very poor topologies, implying non-uniformity with respect to ε of the finite element mixed formulations.


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