Efficacy of Biopesticide Be-Bas against Sweet Potato Weevils (Cylas formicarius Fabricius) in Tidal Land

In Indonesia tidal land is very wide and quite potential for sweet potatoes, but an obstacle for this cultivation is sweet potato weevil (Cylas formicarius) causes loss of 100%. This research aimed to evaluate the efficacy of biopesticide Be-Bas contains Beauveria bassiana entomopathogenic conidia to C. formicarius mortality at tidal lands. This study was conducted on June-November 2016 in South Kalimantan. The research consisted of five treatments and five replications. Results showed that the application of biopesticide Be-Bas in the planting hole and stem base was effective to cause mortality of 17 and 15 larvae per tuber, respectively. However, the application by soaking cutting was able to kill 3 larvae per tuber. The application of biopesticide Be-Bas in the planting hole and stem base were also effective to suppress the number of eggs laid by C. formicarius in the tuber, hence there was no damage found on the tuber. Meanwhile, the application of conventional insecticide was less effective because a total of 17 eggs and 3 larvae of C. formicarius were still found in each tuber. It caused tuber damage up to 17%, thus the tuber cannot be consumed. Therefore, the application of biopesticide Be-Bas in the planting hole or stem base was considered capable to suppress tubers damage caused by C. formicarius better than that of conventional insecticide.

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Auto-infection system for the sweet potato weevil, Cylas formicarius (Fabricius) (Coleoptera : Curculionidae) with entomopathogenic fungi, Beauveria bassiana using a modified sex pheromone trap in the field

Applied Entomology and Zoology ◽

10.1303/aez.34.501 ◽

1999 ◽

Vol 34 (4) ◽

pp. 501-505 ◽

Cited By ~ 25

Author(s):

Keiji Yasuda

Keyword(s):

Sex Pheromone ◽

Sweet Potato ◽

Beauveria Bassiana ◽

Entomopathogenic Fungi ◽

Pheromone Trap ◽

Cylas Formicarius ◽

Sweet Potato Weevil

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PERBANDINGAN METODE APLIKASI JAMUR ENTOMOPATOGEN BEAUVERIA BASSIANA UNTUK PENGENDALIAN CYLAS FORMICARIUS (COLEOPTERA: CURCULIONIDAE)

JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA ◽

10.23960/j.hptt.11784-95 ◽

2017 ◽

Vol 17 (1) ◽

pp. 84

Author(s):

Yusmani Prayogo

Keyword(s):

Sweet Potato ◽

Beauveria Bassiana ◽

Conidial Suspension ◽

Chemical Insecticide ◽

Sweet Potatoes ◽

Insecticide Treatment ◽

Cylas Formicarius ◽

Major Pest ◽

Application Methods ◽

Fungus Beauveria Bassiana

Comparing application methods of entomopathogenic fungus Beauveria bassiana to control Cylas formicarius (Coleoptera: Curculionidae). Cylas formicarius is a major pest of sweet potatoes. The tuber damage caused by C. formicarius reaches 100%. The research objective was to compare application methods of entomopathogenic fungi Beauveria bassiana to control C. formicarius. The research was conducted at the entomology screen house of Indonesian Legume and Tuber Crops Research Institute (ILETRI) at Malang, East Java, from January to September 2013. The treatment consisted of 12 application methods, each was repeated three times. The results showed that application of B. bassiana into the planting pit, soaking the sweet potato cuttings into the conidial suspension of B. bassiana for 30 minutes before planting, followed by spray application with two week interval (2 to 12 weeks after planting, WAP) or P4 was effective in suppressing C. formicarius population and tuber damage. Tuber weight obtained from P4 treatment was 1.4 kg plant-1, while from the chemical insecticide was only 1.1 kg plant-1. Tuber damage from P4 treatment was lower ( 5%) than that from chemical insecticide treatment (42%). Therefore, application of B. bassiana conidial suspension in the planting pit, continued by soaking the sweet potato cuttinginto the B. bassiana conidial suspension for 30 minutes before planting, and followed by spray applications of B. bassiana conidial suspension at two-week intervals ( 2-12 WAP) or P4 method can be recommended to control C. formicarius.

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