DENR Listed Plants with Disorder

Question 1

PLANT:
White lauan (Pentacme contorta)

Answer 1

DISEASE: Interveinal Chlorosis (Sevin) - Fig.2
yellow to brown-orange discoloration of the leaves,
from the matured to the young leaves

Question 2

PLANT:
White lauan (Pentacme contorta)

Answer 2

DISEASE: Benlate Toxicity - Fig.3
leaf chlorosis
the change in color of the leaves from green to yellow is slower than that in Sevin and complete fertilizer
toxicity.
The brown-orange pigmentation appears as spots

Question 3

PLANT:
Kamagong (Diospyros
philippensis)

Answer 3

DISEASE: Interveinal Chlorosis (Sevin) - Fig.4
yellowing/whitening of normally green tissues caused by inadequate light
Affected leaves show initial vein banding/greening, though the leaf midrib remains normal green.

Question 4

PLANT:
Kamagong (Diospyros
philippensis)

Answer 4

DISEASE: Benlate Toxicity - Fig.5

Benlate overdose is expressed as tip blight of young fully expanded leaves

Question 5

PLANT:

Yemane (Gmelina arbora)

Answer 5

DISEASE: Interveinal Chlorosis (Sevin) - Fig.7

Toxicity of Sevin on seedlings is expressed on young leaves as wein greening/banding

Question 6

PLANT:

Yemane (Gmelina arbora)

Answer 6

DISEASE: Benlate Toxicity - Fig.8
Benlate toxicity is also
expressed as vein banding. In a more advanced stage, the chlorosis/yellowing of old leaves leads to premature defoliation.
Too much of the complete fertilizer results in leaf blight starting from the tip of the old leaf and/or occasional leaf spot

Question 7

PLANT:

Narra (Pterocarpus indicus)

Answer 7

DISEASE: Interveinal Chlorosis (Sevin) - Fig.9
Sevin toxicity on seedlings starts as interveinal chlorosis, from the mid portion of older
leaves progressing towards the margin
Slight curling of young leaves is also observed.

Question 8

PLANT:

Narra (Pterocarpus indicus)

Answer 8

DISEASE: Benlate Toxicity - Fig.10

Vein banding and interveinal chlorosis on narra induced by high concentration of Benlate.

Question 9

PLANT:
Palosapis (Anisoptera
thurifera)

Answer 9

DISEASE: Interveinal Chlorosis (Sevin) - Fig.12
Interveinal scorching on palosapis resulting from Sevin
toxicity at a later stage.

Question 10

PLANT:
Palosapis (Anisoptera
thurifera)

Answer 10

DISEASE: Benlate Toxicity - Fig.13
Marginal chlorosis and vein banding symptoms on palosapis due to Benlate toxicity
from fungicide overdose

Question 11

PLANT:
Palosapis (Anisoptera
thurifera)

Answer 11

DISEASE/CAUSE: By application of excessive granular complete fertilizer - Fig.14

RESULT: Leaf curling and marginal scorching on palosapis

Question 12

PLANT:
Banuyo (Wallaceodendron
celebicum)

Answer 12

DISEASE: Interveinal Chlorosis (Sevin)

No external abnormalities on the seedlings are observed even when sprayed with a large concentration of Sevin.

Question 13

PLANT:
Banuyo (Wallaceodendron
celebicum)

Answer 13

DISEASE: Benlate Toxicity - Fig.15

Chlorosis, leaf tip blights and marginal blights are symptoms of benlate toxicity on the seedlings