Credits: Biovision -Infonet Biological methods of plant protection. The most important disease on passion fruit is brown spot (Alternaria passiflorae) on leaves, vines and fruits. Phytophthora blight (Phytophthora nicotianae) causes the wilting of shoot tips and crown rot, particularly where water stagnates occasionally. Septoria spot, caused by the fungus Septoria passiflorae, causes extensive spotting of […]
Monthly Archives: February 2020
Quick Search Passion Fruit Pests
Credits: Biovision-Infonet Mealybugs Aphids Leafmining Flies Bugs Fruit Flies Spider Mites Broad mite or yellow tea mite Nematodes
Downy Mildew
Credits:Biovision-Infonet Symptoms on leaves appear as small, pale-yellow areas on upper leaf surface. Under humid conditions, a purplish, grey whitish growth may be seen on the underside of the yellowish spots. Affected leaves curl, shrivel and die. Most downy mildew fungi require cool weather for reproduction and development. This is not true of the cucurbit […]
Powdery mildew
Credits:Biovision-Infonet Symptoms first develop as a whitish talcum-like powdery growth on upper leaf surface. The powdery growth is composed of fungal spore mass. These areas covered by white powdery growth may enlarge and join up to cover both lower and upper leaf surfaces. Severely affected leaves dry, turn brown and become brittle. Vines can be […]
Choanephora fruit rot
Choanephora cucurbitarum Credits:Biovision-Infonet C. cucurbitarum mostly attacks tissues that have been damaged by insects or mechanical means. Host tissues have a hairy appearance resulting from the tall fungal filaments that produce a cluster of brown spores (conidia) at their tips. What to do: Destroy crop residues after harvest. Control cucumber beetles, which are responsible for fungal […]
Nematodes
(Meloidogyne incognita, M. javanica and M. arenaria) Credits: Biovision-Infonet Amongst nematodes infesting passion fruit the root-knot nematodes (Meloidogyne incognita, M. javanica and M. arenaria), are the most serious pests. Characteristic symptoms of infestation by root-knot nematodes are formation of galls or knots on roots, yellowing of leaves, stunting and eventual wilting of the affected plants. […]
Fusarium wilt
Fusarium oxysporum f.sp. niveum Credits:Biovision-Infonet It causes root rot and corky decay of the stem near ground level, leading to wilting and death. Inside wilted stems the vascular tissue may be discoloured. White to pinkish fungus mycelium may grow over affected tissue. Leaves of affected plants turn yellow and eventually wilt and die. It also […]
Gummy stem blight and black rot
Didymella bryoniae Mycosphaerella citrullina Phoma cucurbitacearum Credits:Biovision-Infonet Circular to irregular spots on leaves. On centres of the spots pycnidia (fungal fruiting bodies) develop. The spots may tear and drop out giving the leaves a tattered appearance. Crown and runners turn pale-brown and then crack oozing a reddish gum. The affected areas are studded with pycnidia. […]
Anthracnose
Colletotrichum lagenarium C. orbiculare Credits:Biovision-Infonet It is a very destructive disease. It causes defoliation and lesions on the fruits. The fungus can attack all the above-ground plant parts. Cotyledons (seed leaves) of affected seedlings droop and wilt. Lesions (elongated spots) may form on stems of affected seedlings near the ground. Spots on leaves start as small yellowish areas that […]
Passion Fruit Bugs
(Nezara viridula) , (Boerias maculata) , (Anoplocnemis curvipes) , (Leptoglossus membranaceus) Credits: Biovision-Infonet Several species of sucking bugs feed on passion fruit. The most important are: The green stinkbug (Nezara viridula) The brown stinkbug (Boerias maculata) Coreid bugs such as the giant coreid bug or tip wilter (Anoplocnemis curvipes) and the leaf footed plant bug […]