[JURNAL] Dinamika Populasi Hama dan Penyakit Utama Tanaman Jagung Manis (Zea mays saccharata Sturt) pada Lahan Basah dengan Sistem Budidaya Konvensional serta Pengaruhnya terhadap Hasil di Denpasar-Bal

 SALBERD FERDINAN RONDO1*) , I MADE SUDARMA2 , DAN GEDE WIJANA2

ABSTRACT

 Dynamics of Pest Population and Main Diseases of Sweet Corn Plants (Zea mays saccharata Sturt) at Wetland with Conventional Cultivation System and Their Effect on Yields in Denpasar-Bali. The study was conducted using survey techniques of pests and diseases in paddy fields belonging to farmers in DenpasarBali, which consists of three fields. The three areas were Sidakarya, Renon and Kesiman. Plant samples in each land were taken using the sample plot diagonal method, with the area of diagonal plot in each land was 3 m x 3 m. Plot observations on each of the specified area of plant samples was done randomly (lottery) as much as 25% of the total number of plants per-plot, then observation was done for population growth of pests and diseases, temperature, humidity and crop yield. The observations was started from 1week old plants after planting (MST) to 1 week before harvesting, with intervals of 1 week. Recording the population of pests and diseases from week to week, the temperature condition and humidity in each area and the condition of the field ( the existing other plants, mulching). Recorded information about conventional cultivation systems applied by each farmer were be explored through interview techniques. The data were then analyzed using correlation and regression and were descriptively explained. The results showed that there were four main types of pests (locusts, seed flies, armyworm and caterpillars cob) and three kinds of major diseases (blight, rust and downy mildew) associated with sweet corn. The results also showed that there was no significant between the correlation dynamics of pest population and diseases with temperature and humidity. As for the commercial harvest, significant effect was shown by the diseases that had an impact on the decrease in yield in quantity especially downy mildew and pest impact on the quality of yields, especially caterpillar cob.

 Keywords: Population dynamics, temperature, humidity, yields

https://drive.google.com/file/d/1AjpBUnAm6bzH5iyizgEnlbNiVg99Llg1/view?usp=sharing


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