Journal of Tropical Mycorrhiza

ANTAGONISTIC ABILITY OF ENTOMOPATHOGENIC FUNGI METARHIZIUM ANISOPLIAE AND BEAUVERIA BASSIANA AGAINST MORTALITY OF WOOD GRASSHOPPER (VALANGA NIGRICORNIS)

Thu, 30 Oct 2025 00:00:00 +0000

The entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana are potential biological control agents for suppressing the population of the wood grasshopper (Valanga nigricornis). This study aims to evaluate the antagonistic ability of the fungi M. anisopliae and B. bassiana against the wood grasshopper (Valanga nigricornis). This study is a descriptive study with a quantitative approach, applying inoculum suspension at four concentration levels (P1, P2, P3, and P4) and observing insect mortality and colony growth in culture media. The results showed that the P4 suspension treatment produced the highest mortality of 92% with a probit value of 1.28, while mortality in other treatments ranged from 0 to 75%. The highest infection viability showed that in the P4 treatment, the CFU value was 3.0×106 for M. anisopliae and 1.4×106 for B. bassiana. These findings indicate that high inoculum concentrations increase the antagonistic effectiveness and infection ability of entomopathogenic fungi.

Effect of Arbuscular Mycorrhizal Fungi and Bio-Hara Liquid Organic Fertilizer on the Growth of Siompu Tangerines in Wabula, Buton Regency

Thu, 30 Oct 2025 00:00:00 +0000

Siompu tangerines are one of the mainstay horticultural crops in Southeast Sulawesi. Siompu tangerines are naturally distributed on Siompu Island, South Buton Regency. Siompu tangerines have great market potential. The purpose of this study was to examine the effect of the interaction between FMA and Biohara Plus IPB liquid organic fertilizer on the growth of Siompu tangerines in the field. This research was conducted at the BPP Wabula office yard in Wabula District, Buton Regency, the Indonesian Mycorrhiza Association (AMI) Southeast Sulawesi Branch plastic house in Kendari, the Agrotechnology Laboratory of the Faculty of Agriculture, Halu Oleo University, and the Biomolecular Laboratory of the Faculty of Mathematics and Natural Sciences, Halu Oleo University, Kendari. This research was conducted from June to September 2024. This study used a randomized block design (RBD) with a factorial pattern consisting of 2 factors. The variables observed were plant height, stem diameter, number of leaves, root length, root colonization, and N and P content in the leaves. The results showed that the interaction between the FMA inoculum from Kaimbulawa and the Biohara liquid organic fertilizer at 5 ml/liter of water was the best treatment, significantly enhancing the growth of 4-month-old Siompu orange seedlings

Identification Of Mycorrhizal Fungi Arbuscular Indigenous On Various Land Use Patterns

Ika Karyaningsih, Ai Nurlaila, Dede Kosasih, Wiwit Walinda, Fika Fauziah — Thu, 30 Oct 2025 00:00:00 +0000

Information on the existence of indigenous Arbuscular Mycorrhizal Fungi (FMA) is needed as an early stage of FMA biofertilizer production to overcome the scarcity of subsidized fertilizers. The purpose of this study was to determine the type of indigenous FMA and determine the location that can be used as a source of FMA inoculum as a biological fertilizer material. Soil and root samples were observed in 4 types of land use, with 10 repeats. The results showed that for every 100 g of soil, the highest number of spores were found in natural forest types as many as 248 spores, in agroforestry land 138 spores, in ex-mining land 95 spores, and at least in sweet potato-intensive agricultural land only 58 spores. Natural forest areas have a high enough spore count so that natural forest locations have the potential to be a source of indigenous FMA inoculum than other types of land use. There are three genera of FMA found, namely Glomus, Gigaspora, and Acaulospora. Glomus is found on all types of land use except monoculture farmland and is the genus that dominates spore populations. The genus Acaulospora is found only in agroforestry land types. Indigenous FMA was found to be able to infect plant roots in natural forests in as much as 6 % and agroforestry land in as much as 16 % so it was included in the medium and low categories. Meanwhile, in the monoculture type of sweet potato and ex-mining land, no root infection was found.