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Alexander Yaku

Fakultas Pertanian Universitas Papua

Author-ID : 2417297

Agriculture, Biological Sciences & Forestry

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Ketahanan beberapa varietas jagung (Zea mays L.) terhadap penyakit karat daun (Puccinia sorghi) di Dusun Copti Distrik Prafi Kabupaten Manokwari Rein Ruimassa; Eko Agus Martanto; Derek Kornelis Erari; Alexander Yaku
Agrotek Vol 10 No 1 (2022): Juli
Publisher : Fakultas Pertanian Universitas Papua

Common corn rust disease caused by the fungus Puccinia sorghi, causes small spots on the upper and lower surfaces of the leaves which then spread to the entire leaf surface, causing a decrease in photosynthetic yield. Losses due to this disease are 45-60%. This study aims to explore the resistance of corn varieties to rust disease. This research was arranged in a descriptive research design using 240 plants of corn. The maize varieties tested were Pertiwi 3, Betrass, Bissi 2, Bissi 18, Bima, and Prafi Merah varieties. The results showed that the intensity of disease increased continuously every week from the first appearance of 5 WAP to 11 WAP. At 11 WAP the severity of the disease was 76% Pertiwi 3, Betrass 91%, Bissi 2 82%, Bissi 18 89%, Bima 80% and Prafi Merah 92% so that all test varieties were classified as susceptible varieties. The susceptibility was triggered by the test variety's gene system which was not sufficient to inhibit the rate of development of pathogens with high virulence. In addition, weather factors with rainfall ranging between 73and 90%, adequate optimal temperatures ranging between 25.7oC and 28.8oC and heavy rains that occur continuously for 24-26 days strongly support production and sporadic distribution in the crop resulting in an increase in severity disease.

Penyebaran cacing pipih New Guinea (Platydemus manokwari de Beaucham)., (Tricladida : Geoplanidae) sebagai musuh alami bekicot di daerah Manokwari Fina Alfionita Tiong; Alexander Yaku; Frenki Arthur Paiki; Adelin Elsina Tanati; Sutiharni
Agrotek Vol 8 No 1 (2020): Juli
Publisher : Fakultas Pertanian Universitas Papua

The purpose of this study was to determine the distribution of the New Guinea flatworm (Platydemus manokwari) as a natural enemy of snails in the Manokwari area. Observations were made at 32 locations in Manokwari area used descriptive method with interviews and direct field observations. The results showed that the distribution of the New Guinea flatworm (P. manokwari) as a natural enemy of snails was found in all locations. However, these worms have not been found directly as biological control agents for snails.

Preferensi bekicot Achatina fulica Bowitch., (Pulmonata : Achatinadea) terhadap beberapa jenis tanaman sebagai pakan di daerah Manokwari Dwi Irianti Handayani; Alexander Yaku; Yacob Bodang; Adelin Elsina Tanati; Sutiharni
Agrotek Vol 7 No 2 (2019): Desember
Publisher : Fakultas Pertanian Universitas Papua

Preference is a form of statement that expresses feelings of preferring one thing over another. This study aimed to determine the preferences of snails (Achatina fulica) to several types of plants in the area of Manokwari. The method used in this research were descriptive method and field observation. Observations in the field were carried out by inventory of snails from the six plants, namely gedi, banana, papaya, sweet potato, cassava, and mustard greens, while data collection in the yard was carried out with an olfactometer to see the interest of snails in several types of plants. The results showed that snails liked the gedi plant the most while the least preferred was cassava.

Co-Authors Alnita Baaka Darius Trirbo Deny Anjelus Iyai Derek Kornelis Erari Dwi Irianti Handayani Dwi Nurhayati Eko Agus Martanto Fina Alfionita Tiong Frenki Arthur Paiki Hanike Monim Miksen M. Sangkek Rein Ruimassa Sutiharni Taberima, Sartji Yacob Bodang

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