Exploration and Effectiveness of Trichoderma sp. from Jember and Trenggalek, East Java, Indonesia Cacao Plantation as A Biological Control of Phytophthora palmivora

Fruit rot disease is very damaging to cacao pods, which is
caused by Phytoptora palmivora. The attack rate of P. palmivora varies.
In Java, losses due to this disease reduce yields by 90 %. P. palmivora is a
soil–borne pathogen. It is currently included in the Kingdom Chromista.
Control with fungicides is not successful at this time, the alternatives is
biologis control with Trichoderma sp. This research used a Completely
Randomized Design (CRD) which was arranged in factorial with two
factors. The first factor was Trichoderma sp. the second factor was
P. palmivora. All treatment combinations were repeated three times.
Trichoderma sp. antagonist test to P. palmivora was analyzed using
Analysis of Variance (ANOVA) and then further tested using a 5 % BNJ.
Trichoderma sp. origin from Jember and Trenggalek districts, East Java,
Indonesia were able to act as antagonists against P. palmivora with the
highest inhibitory of 78 %. In comparison, the lowest inhibitory was 70 %
of isolates from Jember district, East java, Indoe. Characteristics of
Trichoderma sp. The origin of Trenggalek Regency and Jember Regency,
East Java, Indonesia in inhibiting the growth of P. palmivora has the same
species, namely Trichoderma harzianum.