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Pest Mite Composition and Diversity in Cassava Cultivars at Various Altitudes
Abstrak (Bhs. Indonesia)
A vital food crop most commonly found in all regions of the world is cassava. Cassava has many benefits, including a source of carbohydrates, food, and industrial materials, such as animal feed. Cassava plants can also grow well in various soil and climate conditions, making them the right choice to be used as a backup food crop. Cassava plants are also susceptible to different pests and diseases, so research and supervision are needed to ensure product stability. Pest mites are organisms that damage plants cultivated by humans and are economically detrimental. Pest mites often feed on plants' leaves, flowers, and fruits, which can reduce crop yields and affect crop quality. This study aims to determine the composition and diversity of pest mites on cassava cultivars at various altitudes. The research method used a survey method with a purposive random sampling technique. This research was conducted from August to September 2022. Independent variables are cassava plants, altitude, temperature, and humidity at the sampling location. The dependent variable is the number of species of each pest mite. The parameters observed were cassava plant leaves, the number of pest mites, and the population of pest mite species. Data analysis in the form of relative abundance and pest mites obtained were analyzed by analysis of variance of the complete random model at the 5% error level and then calculated the diversity index value using the Shannon-Wiener diversity formula. The results showed nine species: tetranycus kanzawai, mononychellus tanajoa, t.cinnabarinus, oligonychus gosspii, brevipalpus obovatus, t.urticae, t.putrescentiae, t.truncatus and euseius concordis found in the sampling location. The analysis of the variance of the three altitudes shows no difference in the abundance of pest mites between altitudes. The results of pest mite diversity at three altitudes are classified as moderate, which means that the relationship between pest mites and predatory mites on cassava plants is relatively stable.
Abtrak (Bhs. Inggris)
A vital food crop most commonly found in all regions of the world is cassava. Cassava has many benefits, including a source of carbohydrates, food, and industrial materials, such as animal feed. Cassava plants can also grow well in various soil and climate conditions, making them the right choice to be used as a backup food crop. Cassava plants are also susceptible to different pests and diseases, so research and supervision are needed to ensure product stability. Pest mites are organisms that damage plants cultivated by humans and are economically detrimental. Pest mites often feed on plants' leaves, flowers, and fruits, which can reduce crop yields and affect crop quality. This study aims to determine the composition and diversity of pest mites on cassava cultivars at various altitudes. The research method used a survey method with a purposive random sampling technique. This research was conducted from August to September 2022. Independent variables are cassava plants, altitude, temperature, and humidity at the sampling location. The dependent variable is the number of species of each pest mite. The parameters observed were cassava plant leaves, the number of pest mites, and the population of pest mite species. Data analysis in the form of relative abundance and pest mites obtained were analyzed by analysis of variance of the complete random model at the 5% error level and then calculated the diversity index value using the Shannon-Wiener diversity formula. The results showed nine species: tetranycus kanzawai, mononychellus tanajoa, t.cinnabarinus, oligonychus gosspii, brevipalpus obovatus, t.urticae, t.putrescentiae, t.truncatus and euseius concordis found in the sampling location. The analysis of the variance of the three altitudes shows no difference in the abundance of pest mites between altitudes. The results of pest mite diversity at three altitudes are classified as moderate, which means that the relationship between pest mites and predatory mites on cassava plants is relatively stable.
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