Efficacy of Beauveria bassiana and Metarhizium anisopliae with for controlling Aphis and Cotton worm of cabbage

Houmphaeng  PHONEXAY; Keobouasone RAZKHANTY; Kongmy SYMOUKDA

Authors

Houmphaeng PHONEXAY Master of Agriculture and Forestry, Champasak University
Keobouasone RAZKHANTY Agriculture Section, Agriculture and Forestry Department, Champasak University
Kongmy SYMOUKDA Agriculture Section, Agriculture and Forestry Department, Champasak University

Keywords:

Beauveria bassiana, Metarhizium anisopliae, Aphids, Cotton worm

Abstract

The purpose of this study is to identify the most effective fungi species in the laboratory for controlling the Aphis and Cotton worm in cabbage, as well as to determine the effectiveness of the fungi in controlling the Aphis and Cotton worm in cabbage in the cultivation area of Paksong district, Champasak province. According to the findings of the study, the percentage of death Aphis and Cotton worm in was greater after 7 days than after 3 and 5 days. Spraying with the fungus M. anisopliae results in the greatest average death percentage of Aphis, which is 85.00%, while spraying with the fungus B. bassiana results in the highest average mortality percentage of Cotton worm, which is 75.00%. When M. anisopliae and B. bassiana fungi were tested in the field conditions compared Abamectin chemical spraying and normal water (control), all components were determined to be statistically different at the 99% confidence level. Spraying with Abamectin chemical resulted in the destruction of Aphis, Cotton worm, the weight per head and the average production per area of cabbage equal to 2,33 /m²; 2,53 /m²; 1,81 kg and 75,20 kg/10m² respectively. Followed by spraying with the fungus M. Anisopliae with an average value of 3.66 /m²; 5,00 /m²; 1,66 kg and 71,50 kg/10m² respectively and Spraying with B. Bassiana has an average value of 6.66 /m²; 4.66 /m²; 1,69 kg and 70,83 kg/10m² respectively. Spraying with regular water (control) had the lowest results of all components.

As a result, it can be concluded that: in laboratory conditions, the fungus M. anisopliae is the most effective in controlling Aphids, while the fungus B. bassiana T. Hazinum is the most effective in controlling the Cotton worm. In the field of cultivation, both fungi are effective in controlling Aphids and Cotton worm, as well as responding to other elements less effectively than chemicals, but there is a good tendency to use them instead of chemicals when the consequences of using chemicals to prevent and eliminate pests are considered.