scholarly journals Ecology and control of insect pests of soybean cultivated in rotational paddy field. 1. Seasonal prevalence in 1979 and chemical control

1980 ◽  
Vol 26 ◽  
pp. 133-135 ◽  
Author(s):  
Michiaki NAGANO
Keyword(s):  
Paddy Field ◽  
Chemical Control ◽  
Insect Pests ◽  
Seasonal Prevalence ◽  
And Control

Assessment of insect pests of sweet potato (Ipomoea batatas L.) and control with botanicals

2021 ◽  
pp. 1-9
Author(s):  
K. C. Igwe ◽  
A. A. Osipitan ◽  
C. G. Afolabi ◽  
O. I. Lawal
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Insect Pests ◽  
And Control

scholarly journals Studies on the Ecology and Control of Perennial Weed, Scirpus in Paddy Field

1978 ◽  
Vol 23 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Norimitsu ISHIKURA ◽  
Yoshio SOGA
Keyword(s):  
Paddy Field ◽  
Perennial Weed ◽  
And Control

scholarly journals Occurence and Control of Insect Pests on Perilla in Aichi Prefecture

2003 ◽  
Vol 45 (0) ◽  
pp. 71-72 ◽  
Author(s):  
Keiji Itoh ◽  
Ayumi Oguri ◽  
Atutoshi Suzuki
Keyword(s):  
Insect Pests ◽  
Aichi Prefecture ◽  
And Control

scholarly journals USE OF INDIGENOUS ISOLATES OF METARHIZIUM, ISARIA AND BEAUVERIA AS POTENTIAL BIO-CONTROL AGENTS AGAINST Sitophilus oryzae UNDER LABORATORY CONDITIONS

2019 ◽  
Vol 56 (04) ◽  
pp. 1037-1044
Author(s):  
Saif-Ur Rehman
Keyword(s):  
Chemical Control ◽  
Multiple Dose ◽  
Insect Pests ◽  
Sitophilus Oryzae ◽  
Immersion Method ◽  
New Class ◽  
Laboratory Conditions ◽  
Dose Comparison ◽  
Fungal Isolates ◽  
Conidial Concentration

Entomopathogenic fungi (EPF) are suggested as a new class of alternates followed by Synthetic chemical control of the insect pests .Virulence of seven EPF isolates, four strains of Metarhizium {(Qin-08, Qin-13, Qin-18 and ME-38 (LT-178)}, two of Isaria {ME-33 (ILT-01), Yulin-5 (IYL-01)} and one of Beauveria bassiana (Qin-21) were assessed against the adults of Sitophilus oryzae under laboratory conditions, firstly at single conidial concentration (1x108 ml-1 ) by immersion and the food mix methods. Qin-21, ME-33 and Qin-18 caused significantly highest mortality of S.oryzae at immersion methods (100, 100 and 98%), followed by food mix method to 100, 84.16 and 91.66% respectively. Yulin-5 was the least effective, showing significantly the lowest mortality at food mixed (32.49%) and immersion methods (40.20%) respectively. Hence, the immersion method was found to be most effective, resulting the higher mortality rate of S. oryzae in comparison to food mix method, in all tested fungal isolates. Secondly, we screened out the most effective isolates for multiple dose comparison i.e., 1x104 to 1x107 conidia ml-1 by immersion method only. The isolate ME-33 resulted in 100% mortality of the pest at higher conidial dose as compared to Qin-21 and Qin-18 which showing 80 and 64.64% mortality respectively. The LT50 was observed to be 3.63, 4.17 and 8.58 days in ME-33, Qin-21 and Qin-18, respectively at the highest conidial concentration (1x107ml-1 ). ME-33 isolate with the highest mortality and lowest LT50 at conidial concentration 1x107 ml-1 proved to be most effective for the control of S. oryzae. So these fungal islotes could be a better alternative for the management of S. oryzae

Improvement on Natural Enemies of Bemisia tabaci (Hemiptera: Aleyrodidae) Using Extracts of Agrimonia pilosa

2019 ◽  
Vol 112 (4) ◽  
pp. 1581-1586
Author(s):  
Huifang Guo ◽  
Yufeng Qu
Keyword(s):  
Biological Control ◽  
Bemisia Tabaci ◽  
Natural Enemies ◽  
Insect Pests ◽  
Ethanol Extract ◽  
Pathogenic Fungi ◽  
Melia Azedarach ◽  
Encarsia Formosa ◽  
Ethanol Extracts ◽  
And Control

Abstract Compared with the numerous natural enemies against insect pests that have been identified, the commercialization of natural biological control resources remains very limited. To increase the use of natural enemies for biological control, determining how to improve the low efficacy, slow speed, and high cost of natural enemies is very important. Mediterranean species of The whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodoidea), increasingly threatens many crops in China, and control primarily depends on chemical insecticides. Here, the effect of ethanol extracts from two plants, Agrimonia pilosa (Ledeb) (Rosales: Rosaceae) and Melia azedarach (Linn) (Meliaceae: Melia), on predominant natural enemies of B. tabaci was investigated using a leaf dipping or spraying method. The results showed that the ethanol extract of A. pilosa significantly improved the infectivity of the fungus Isaria javanica (Friedrichs & Bally) (Ascomycota: Hypocreales), and the mortality of whiteflies caused by the combination of fungus (105 spores/mL) with the extract of A. pilosa (2 mg/mL dried powder of A. pilosa containing 0.0942 mg/mL total polyphenols) was 81.6%, which was significantly higher than that caused by the fungus only. However, the ethanol extract of M. azedarach had no effect on fungus infectivity. Additionally, insecticide tolerance of the predator Pardosa pseudoannulata was also significantly improved by the extract of A. pilosa. The longevity of the parasitoid Encarsia formosa was not affected by the extracts. These findings indicate that the extract of A. pilosa played a dual role that included improving pathogenic fungi infectivity and insecticidal tolerance of a predator and thus could be a synergist in the biological control of B. tabaci.

scholarly journals Sprayer Type and Water Volume Influence Spatial Patterns of Pesticide Deposition and Control of Diseases and Insect Pests of Highbush Blueberries

2020 ◽  
Vol 20 (sup3) ◽  
pp. S1805-S1818
Author(s):  
J. C. Wise ◽  
L. A. Miles ◽  
D. Acimovic ◽  
C. Vandervoort ◽  
R. Isaacs ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Insect Pests ◽  
Water Volume ◽  
Highbush Blueberries ◽  
And Control ◽  
Pesticide Deposition
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