[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

 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-Bali 

SALBERD FERDINAN RONDO1*), I MADE SUDARMA2, DAN 

GEDE WIJANA2 

1Mahasiswa Program Studi Magister Agroteknologi, Program Pascasarjana,  Universitas, Udayana. 

2Staf Pengajar Program Studi Agroteknologi, Program Pascasarjana, Universitas Udayana. Jl. P.B. Sudirman, Denpasar, Bali 80232. 

*) E-mail: sf_rondo@yahoo.com 

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 Denpasar  Bali, 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://docs.google.com/document/d/1Wz6JcUtRm48mwpIh0vrnaAO9hnhtWY2gc4uvSyP0dmM/edit?usp=sharing

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