scholarly journals Efficacy of some biocides against Potato Leafhopper, Empoasca fabae (Homoptera: Cicadellidae), on cowpea

2018 ◽  
Vol 11 ◽  
pp. 2277-2282
Author(s):  
Nihad Aziz Khamas ◽  
Hussein Ali Salim ◽  
Hussein Ali Mutney ◽  
Ferial Bahgat Hormoz

A field study was carried out in Khan Bani Saad district, Diyala province on 2015 to evaluate bio pesticides viz. Spinosad (Saccharopolyspora spinosa) , BSA3 (Beauveria bassiana) , Mycotal (Lecanecillium muscarium) and using chemical insecticide Hatchi hatchi 15% EC against Potato Leafhopper Empoasca fabae on cowpea. the rate of nymphs and adults population was significantly reduced in treatments Hatchi hatchi (1.8,3.7), Mycotal (3.3,4.7)  , Spinosad (3.3,5.6)and BSA3 (3.7,6.4) compared with control (6.4,9.2) respectively. The results was showed that superiority of spinosad treatment in  mortality of nymphs  of E. fabae to (44.76%) with significant differences from other treatments followed by mycotal (41.31%), and then BSA3, which amounts to (29.77%). Mycotal was showed high  mortality in the adults of E. fabae to 50.6%  then  Spinosad (39.49%) and BSA3 (30.15%) . This study shows that the use of one of these biocides in the field may be sufficient to reduce the numbers of nymphs and adults during the study season.

2017 ◽  
Vol 23 (3) ◽  
pp. 183 ◽  
Author(s):  
Hendrawan Samodra ◽  
Yusof Bin Ibrahim

Eight isolates of entomopathogenic fungi were evaluated as dried conidia against the rice moth,  Corcyra cephalonica. In bioassays two isolates of Beauveria bassiana (BbGc and BbPs) and one isolate of Metarhizium anisopliae (MaPs) consistently gave high mortality to C. cephalonica larvae. Formulations in either kaolin, talc or tapioca flour (20 % w/w a.i.) thoroughly mixed with long grain rice in plastic cups (8 cm diameter by 5 cm) gave complete larval mortality by the 12th day of treatment. However, in general those formulated in kaolin and talc were more efficacious and faster to kill compared to those formulated in tapioca flour or the unformulated control. Even at the lowest rate of 0.05 g BbGc in kaolin provided 100% mortality 7 days after introduction compared with other dust formulations. Isolate BbGc in kaolin and talc administered at 0.4 g a.i. in 200 g rice packed in plastic kept at room temperature provided protection against the rice moth up to 4 months of storage. Larval mortality in excess of 90% was obtained 15 days after introduction. Formulations of MaPs was effective only within the first month of storage beyond which infectivity rapidly declined.


2008 ◽  
Vol 2 (1) ◽  
pp. 24-32
Author(s):  
Sh. H. AL-Obaidi ◽  
L. K. AL-Ani ◽  
W. A. Hussain

A field study were conducted to evaluate the efficacy of the entomopathogenic fungi Beauveria bassiana as abiocontrol agent for the cotton leaf worm Spodoptera littoralis infesting potato plants. Results indicated that soil treatment of the entomopathogenic fungi significantly reduced the percentage of plant infestation to 64.3, 60.7 % after 14, 21 days. Results of the infection intensity also significantly reduced in treatment of entomopathogenic fungi in soil to 18.7, 9.9 pore/leaf after 14, 21 days of treatment.The results revealed the higher efficiency of entomopathogenic fungi on plant yield, it become 633.3 gm in entomopathogenic fungi in soil treatment.


2018 ◽  
Vol 3 (2) ◽  
pp. 47
Author(s):  
Hayata Hayata

ABSTRACTOne of the barriers in the cacao caltivation is attacking of hama penggerek Buah Kakao (PBK) that caused by conopomorpha cramerella.Inflicted Damage caused by PBK larvae was look like broken and wrinkled seeds, and there was a dark color on its skin that caused the decreasing of products weight and its quality.To control this BPK pests of cocoa could C Cramerella, generally farmers used chemical insecticide. The continously use of this insecticide was feared a bigger trouble such as pest resistance, environmental pollution, and product refusing caused by the pesticide leftover over the standard. Biological control using entomopatogen was one of PHT. Concept. The useness of entomopatogen such as beauveria bassiana fungi as a controller agent is one way to avoid the negative impacts of chemicals toward to the environment .B. bassiana Fungi possess the high reproductive capacity, easily produced and it is able to produce a long surviving spores on a unfavorable condition. B. bassiana has a high potential in controlling various types of pest. Beside, this fungi shows easily obtained, it also easy propagated so that it can be reduces the control cost.The useness of B. bassiana fungi as a cacao pest control that will be conducted in small cocoa plantations in the Kebun Sembilan village will show how its ability in reducing the cacao pest population.The research uses completly randomsed block design which rice media with B. bassiana as a treatment factor. The result should has relation with cacao quality.Key word: Conopomorpha cramerella , beauveria bassiana , attacking intensitas.ABSTRAKSalah satu kendala dalam pengembangan tanaman kakao adalah serangan hama penggerek buah kakao (PBK) yang disebabkan oleh Conopomorpha cramerella. Kerusakan yang ditimbulkan oleh larva PBK berupa rusak dan mengeriputnya biji, timbulnya warna gelap pada kulit biji yang mengakibatkan turunnya berat dan mutu produk. Untuk mengendalikan hama penggerak buah kakao C. cramerella tersebut umumnya petani menggunakan insektisida kimia. Penggunaan insektisida secara terus-menerus dikhawatirkan menimbulkan masalah yang lebih berat, antara lain terjadinya resistensi hama, pencemaran lingkungan, dan ditolaknya produk akibat residu pestisida yang melebihi ambang toleransi.Pengendalian hayati dengan menggunakan entomopatogen merupakan salah satu dari konsep PHT. Penggunaan entomopatogen jamur Beauveria bassiana sebagai agen pengendali merupakan salah satu cara untuk menghindari dampak negatif dari bahan kimia terhadap lingkungan. Jamur B. bassiana mempunyai kapasitas reproduksi yang tinggi, mudah diproduksi dan pada kondisi yang kurang menguntungkan dapat membentuk spora yang mampu bertahan lama di alam. B. bassiana memiliki potensi yang besar dalam mengendalikan berbagai jenis hama. Selain mudah didapat, jamur ini mudah diperbanyak sehingga dapat menurunkan biaya pengendalian. Pengunaan jamur B. bassiana untuk pengendalian penggerek buah kakao yang akan dilakukan di perkebunan kakao rakyat di desa kebun sembilan akan memperlihatkan bagaimana kemampuan jamur tersebut dalam menekan populasi penggerek buah kakao. Penelitian menggunakan rancangan acak kelompok dengan faktor perlakuan berat media beras nasi yang terkandung B. bassiana. hasil akhirnya adalah kualitas buah kakao.Kata kunci : Conopomorpha cramerella, Beauveria bassiana, Intensitas serangan,


1990 ◽  
Vol 56 (2) ◽  
pp. 157-174 ◽  
Author(s):  
S.P. Wraight ◽  
T.M. Butt ◽  
S. Galaini-Wraight ◽  
L.L. Allee ◽  
R.S. Soper ◽  
...  

2012 ◽  
Vol 58 (12) ◽  
pp. 1626-1634 ◽  
Author(s):  
Bridget DeLay ◽  
Praveen Mamidala ◽  
Asela Wijeratne ◽  
Saranga Wijeratne ◽  
Omprakash Mittapalli ◽  
...  

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