Survey of insect pests and diseases of flue-cured tobacco in Region 2 [Philippines]
1985
Pojas, E.N. | Alcoy, R.J. | Quesada, Z.A.
Six major insect pests and nine minor species were observed to feed on tobacco plants. The six major insect pests were: budworms, Helicoverpa armigera (Hubn.) and H. assulta (Guenee), cutworms, Spodoptera litura (Fabr.), katydid, Phaneroptera furcifera Stal., tree cricket, Oecanthus indicus (Saussure), and aphids, Myzus persicae (Sulzer). There were nine predators observed. The greatest number of budworms attacking the plants at vegetative stage or 4 to 7 weeks after transplanting (WAT) and at maturity (12 to 14 WAT). Population density was highest in Pidigan, Abra. Cutworms and aphids occurred during the vegetative growth of the plants. Katydids occurred as early as the seedling stage but were more prevalent at later stages of plant growth. Tree crickets were most abundant during the later stage of plant growth and preferred top leaves for feeding. Tobacco bug, Cystopeltis termis (Reuter) was the most abundant predators of budworms and cutworms eggs and larvae. The major diseases observed were wilt, root knot, mosaic and cercospora leaf spot
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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