Diamond back moth

antennae. The hindwings are narrow, pointed toward the apex. The tips of the wings appear to turn upward slightly when viewed from the side. In males, the upper [...] may occur in the florets. Initially, the pupa is pinkish-white to pinkish-yellow and changes to brown before adult emergence. The adult of the diamond back [...] white upper edge. In females, the upper two-thirds of the forewings are light ochreous and the markings are like those of the males. The back is marked with

Guava

– a smallish tree. The pulp varies from off-white to bright pink, and is between 4 to 12 cm in length. The taste ranges from tart to very sweet. [...] fruit is cultivated in many tropical and subtropical regions. A vivid yellow or green on the outside, Psidium guaiava, is the fruit of the Myrtle family (

Two-spotted spider mite

cause damage to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce the cells and suck out the contents [...] contents. The empty dead cells become yellow, and in many plants the damage can also be seen on the upper surface of leaves as small yellow dots. The destruction [...] removed, the leaf, and eventually the whole plant, may die. In tomatoes and cucumbers, as little as 30% damage of the leaf surface can lead to loss of the

Cotton bollworm

orange moths approximately 18 to 19 mm in length and have a wingspan of about 40 mm. The grey-green males are smaller. The forewings are edged with a line [...] General The cotton bollworm ( Helicoverpa armigera ) occurs in the tropics and sub-tropics of all continents except for North America. Larvae of the cotton [...] Young caterpillars are yellowish-white to reddish-brown with dark spots. In later instars the head is mottled, and the body is marked with three prominent

Pierce's disease of grapevine

substance, in the vessels. The bacteria, gum and tyloses block the vessels, causing the plants to wilt. Transport to different plant parts depends on the plant [...] bacterial levels in the leaves to neighbouring peach trees with the bacteria mainly in the roots is much more successful than the other way around. In general, [...] plant species: in peach, bacteria are found in high numbers in the roots, whereas in plum, high numbers are found in leaves and fruits. The bacteria are

Avocado

with only one seed. The berry is green-skinned and fleshy and its shape resembles a pear or (large) egg. The avocado tree belongs to the flowering plant family [...] About The avocado ( Persea americana ), also named ‘alligator pear’ is a tree originating in South Central Mexico. Its nick name points to its fruit which [...] Lauraceae . Commercially speaking, avocados are very valuable and the fruit is produced in tropical and Mediterranean regions. Avocados ripen only after they

Cauliflower

About The cauliflower, along with several other vegetables, belongs to the species Brassica oleracea of the genus Brassica which is part of the family [...] collard greens and kale (collectively called "cole" crops) belong to various cultivars, but are all members of the species Brassica oleracea. The cauliflower [...] plant that reproduced by seed. The cauliflower head looks like broccoli and consists of white, flowering meristem. Only the cauliflower head is eaten, this

Banana

(usually easy to peel) can be green or yellow, or red, purple or brown when ripe. Bananas grow in bunches downwards from the top of the plant. Nowadays [...] About The banana ( Musa spp.) is a nutritious fruit that grows from various large, herbaceaous flowering plants belonging to the genus Musa . Botanically [...] speaking the fruit is a berry and it varies in colour, size and firmness. Bananas mostly are elongated and curved. Its flesh is soft, rich in starch and

Root rot of carrot

features hence is not easy to place it at the generic level. Årsvoll was the first to identify and describe the fungus in Norway, in 1965. An infection can [...] conditions, an olive-green mycelium can develop on the surface. Initially, the disease forms circular to irregular spots on the leaves that vary in colour from [...] from grey to almost black. The spots appear to be sharply defined, but under a magnifying glass it appears that the infected area radiates into the healthy

Potato

About The word ‘potato’ ( S olanum tuberosum ) is used to refer to the plant itself or its edible tuber. The plant is an herbaceous perennial and came [...] came to Europe from Latin America in the second half of the 16th century. Potatoes as a food crop were introduced by the Spanish. Now this starchy, tuberous [...] an integral part of the world’s food supply and many people’s diet. In terms of volume, potato is the fourth-largest food crop in the world, after maize