RDE Abstract of Completed Research
Sugarcane Pests / Nematodes
- Cultural Practices for the Management of Lesion Nematodes (2005)
- J. Recuenco
-
- Application of cultural practices showed highly significant differences in the lesion nematode populations six months after planting. Pratylenchus populations of plots treated with Furadan and applied with mudpress were comparable and were significantly lower than those where trashes were burned and those treated with Durabloom.
-
- Pratylenchus populations in the different cultural practices applied differ significantly at 5, 6, 8 and 12 months after ratooning. Pratylenchus adults were 17.64% higher in the ratoon canes than in the plant canes with an average of 189.29 per 200 grams soil sample. Mudpress application and Furadan treatment had 30.80% lower nematode populations than burning of trashes and treatment with Durabloom.
- Trichoderma sp. for the bio-control of parasitic nematodes of sugarcane (1997)
- Juliet Recuenco
-
- Three Trichoderma spp. (T.harzianum, T. viride and T. koningii), Trichoderma fortified compost and Carbofuran were tested on pathogenic nematodes infecting sugarcane in the screenhouse and field.
-
- In the screenhouse, T. harzianum, Trichoderma-fortified compost and Carbofuran gave better suppression of nematode population than the untreated soil. They gave heavier green leaves and roots with longer canes. T. viride and T. koningii had lower nematode reduction than Trichoderma-fortified compost, but differences were not significant.
-
- In the field, treated soils significantly showed effective control of the parasitic nematodes up to seven months. T. harzianum, Trichoderma-fortified compost and Carbofuran consistently gave higher nematode control than the untreated soil. They produced longer and heavier stalks with larger diameter than T. viride, T. koningii and untreated soil. T. harzianum and Carbofuran gave higher cane yields than the other treatments. However, the treatments did not significantly differ in Lkg/TC and Lkg/Ha.
- Influence of selected plant species on the population of parasitic nematode of sugarcane (2002)
- Juliet Recuenco and Agnes Casupanan
-
- Selected plant species, marigold (Tagetes erecta) chichirica (Cantharanthus roseus), corn (Zea mays) and tomato (Lycopersicon esculentum) were intercropped with sugarcane in the screenhouse and field to determine their influence as non-host plants on the population dynamics of parasitic nematodes and growth and yield of sugarcane.
-
- Intercropping, individually or a combination of non-host and host crops, considerably decreased nematodes attacking sugarcane. Pratylenchus population in all the treatments were significantly lowered by the different selected plants.
-
- The beneficial effects of marigold as intercrop persisted until sugarcane maturity. Corm or tomato, and both similarly provided control of the nematodes at the early growth of sugarcane but their efficacy declined as the sugarcane plants grew and developed roots and shoots and after their harvesting. The reduction in nematode population sustained by the intercrops at one to four month old sugarcane was reflected in the higher yield of cane and sugar.
-
- The dominant genera observed in both screenhouse
and field experiments were Pratylenchus, Tylenchorhynchus, Helicotylenchus
and Rotylenchus. Less observed were Criconemella, Rotylenchus,
Hemicycliophora, Hoplolaimus and Xiphinema.
-
- Growing non-host and host plants with sugarcane
can therefore reduce nematodes pathogenic to sugarcane. The host
plants however, must be susceptible and attractive to the dominant
nematode genera and harvested with their roots as trap crops
to prevent rapid population build-up in the sugarcane rhizosphere.
- Occurrence and control of plant parasitic nematodes on sugarcane (2002)
- Juliet Recuenco
-
- Soil samples collected from four mill districts (Don Pedro, Balayan, Pampanga and Tarlac) showed that Don Pedro and Balayan mill districts had the highest nematode populations which ranged from 300 to 1000 nematodes per 200 grams of soil. The predominant species observed were Pratylenchus, Helicotylenchus and Tylenchorhynchus.
-
- Sugarcane plants inoculated with the highest count of Pratylenchus had higher population. 30, 60 and 120 days after inoculation. The Pratylenchus population multiplied and increased as the sugarcane plants developed more roots. The nematode population ranged from 282 to 611 which were higher than the critical level, 120 days after inoculation.
-
- The uninoculated sugarcane plants had higher values in weight of green leaves, length and weight of stalk and diameter of base than those infested with nematodes. Plants with lower Pratylenchus inoculations had heavier green leaves with longer and bigger stalks than those with higher nematode inoculations.
-
- Starguard, Cadusophos and Carbofuran effectively controlled the nematode populations. One to 4 months after treatment, however, Starguard controlled nematode populations better than Cadusophos and Carbuforan. Five months after treatment, the nematode population increased and continued until sugarcane maturity.
-
- The yield of cane and sugar in the treated soils were higher than those in the untreated plots. The differences however, were not significant.
